Science topic
Fracture Mechanics - Science topic
Fracture mechanics is the study of the influence of loading, crack size, and structural geometry on the fracture resistance of materials containing natural flaws and cracks. When applied to design, the objective of the fracture mechanics analysis is to limit the operating stress level so that a preexisting crack would not grow to a critical size during the service life of the structure.
Publications related to Fracture Mechanics (10,000)
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This course offers an in-depth exploration of the novel Finite Fracture Mechanics (FFM) technique for modeling crack and failure initiation, with practical applications to real-world problems. It is designed for post-graduate students, expert researchers, and engineers who wish to understand, apply, or develop this approach.
Ultrasonic fracturing, a novel method, has diverse applications in hard rock boring and oil and gas extraction. Understanding the fracture mechanisms of cracks under ultrasonic loading is essential for advancing the study of ultrasonic fracturing in rocks. This paper introduces an innovative method, 3D-ILC (3D-internal laser-engraved crack), to pre...
Introduction
The unique and dynamic features of the feline mandibular angle make open reduction and internal fixation in this region more challenging than in the mandibular body. Visualization of fracture patterns through a fracture map can be a valuable tool for qualitative analysis of fractures in this region. In addition, fracture maps are usefu...
The mechanical behavior of the suspenders under the coupled effects of vehicular loads and environmental factors is exceptionally complex, and the failure paths of the high-strength steel wires within the suspenders remain unclear. Consequently, there is an urgent need to establish a reliability assessment method for the fatigue system of short sus...
In underground engineering, precise analysis of structural discontinuities is critical for understanding the rock fracture mechanisms subjected to shear and tensile loading. This study presents an automatic method for identifying structural planes based on 3D point cloud data of sandstone. The methodology integrates K-nearest neighbor (KNN) search...
A numerical model for predicting the fracture of material with hydrogen diffusion-induced cracking is necessary to provide accurate lifetime predictions for the structural integrity of mechanical components and infrastructure across various industrial sectors. Despite its undesired presence, hydrogen is ubiquitous in oil and natural gas transportat...
Understanding the interfacial bond behavior between externally bonded fiber-reinforced polymer (EBFRP) and concrete is essential for effective strengthening of civil structures. Various bond-slip models exist, but most analytical models are too complex for practical engineering, and empirical models lack flexibility across diverse configurations. F...
This study investigates the influence of build height variation and heat treatment on the microstructure evolution and tensile properties of IN718 alloy produced by Direct Energy Deposition (DED). Microstructural evolution and tensile properties were evaluated at room temperature and 650°C for samples taken from three build heights: 5 mm (bottom re...
The titanium carbide particles reinforced iron matrix composites (TiC/Fe MCs) with different TiC contents of 25, 33, and 41 wt% were fabricated using spark plasma sintering (SPS). The effect of TiC content on the microstructure and mechanical properties of the TiC/Fe MCs was studied. The results were obtained from scanning electron microscopy (SEM)...
The mainstream method for extracting shale gas involves hydraulic fracturing to create fracture networks. However, as extraction depth increases, notable issues such as rapid production decline, low recovery rates, high water consumption, and resource waste become apparent. Identifying new and efficient auxiliary rock-breaking technologies is cruci...
Fractures are diverse geological features. Despite extensive research on their varied geometries and growth mechanisms, there has been relatively little focus on how acid–rock interactions, such as reactive transport and precipitation, influence crack growth. To understand the chemical corrosion of sandstone exclusively from chemical reaction, we h...
This study investigated the hot rolling of titanium-steel clad plates, produced via roll bonding, at four temperatures: 850, 900, 950, and 1000 °C. The aim was to produce thin-gauge titanium-steel clad plates with a total thickness of 2 mm. Interfacial compounds were analyzed using scanning electron microscopy (SEM), backscattered electron imaging...
This study developed a twinning-induced plasticity (TWIP) steel characterized by lightweight, high strength, and high toughness. Tensile tests were conducted at strain rates ranging from 10−4 to 6500 s−1 using a universal testing machine and a Hopkinson bar to evaluate the material’s mechanical properties. A Johnson–Cook (J-C) constitutive model wa...
![The chemical composition [wt %] of test specimen.](publication/389840236/figure/tbl1/AS:11431281315763272@1741943640887/The-chemical-composition-wt-of-test-specimen_Q320.jpg)
Hydrogen is a promising eco-friendly energy source, but its embrittlement effect on structural materials remains a significant challenge. This study investigates the notch sensitivity of 316L stainless steel under in situ electrochemical hydrogen charging, with a focus on mechanical degradation and fracture behavior. By examining the influence of n...
Fracture toughness describes a material’s ability to resist failure in the presence of defects. In case of soft biological tissues, a reliable determination and interpretation of the fracture properties is essential to estimate the risk of fracture after clinical interventions. Here we perform a comparative computational study between soft biologic...
The extensive application of hydraulic fracturing in unconventional reservoirs raises new challenges in understanding the fracture mechanism of granitic materials. Triaxial hydraulic fracturing experiments were conducted to examine the influence of coarse grains on the failure behaviour of impermeable granites based on the associated seismic respon...
Blasting excavation and mechanical vibration in underground engineering often induce “three-dimension (3D) stress + dynamic disturbance” coupled failure of rockmass structural planes, leading to engineering disasters. However, the disturbance effects on rockmass structural planes under 3D stress are unclear. Therefore, true triaxial shear disturban...
This study presented a novel approach for reinforcing nano Ag sintered joints with Ag-coated Cu foam, aimed at achieving reliable and large-area bonding for power electronics. Two joint sizes, 3×3 mm2 and 10×10 mm2, were successfully fabricated at low temperatures to evaluate the impact of Ag-coated Cu foam on the microstructure, mechanical propert...
This article examines the influence of annealing temperature on fracture toughness and forming limit curves of dissimilar aluminum/silver sheets. In the cold roll bonding process, after brushing and acid washing, the prepared surfaces are placed on top of each other and by rolling with reduction more than 50%, the bonding between layers is establis...
The anisotropic behaviour of jointed soft rocks subjected to cyclic loading corresponding to small earthquake events and the affecting parameters is not studied extensively. In the present study, the anisotropic strength response of jointed soft rocks under cyclic loading is investigated under varying pre-heating temperatures (i.e., 30 °C–300 °C),...
Backbreak is an undesirable outcome in blasting operations caused by factors such as equipment failure, improper fragmentation, unstable mine walls, reduced drilling efficiency, and other issues that contribute to increased mining operation costs. To overcome these problems effectively, this study developed a least square support vector machine (LS...
In the present study, an atomistic K-test framework for the fracture toughness assessment of generally oriented grain boundaries (GBs) (tilt, twist, mixed) and triclinic single crystals is investigated. Boundary conditions for the modelling of cracks along the interfaces of bicrystals are derived based on the 6th-order Stroh formalism and compared...
X80 steel pipelines are widely used in oil and gas transportation, and the quality and fracture behavior of the girth weld have an important influence on the safety and performance of the pipeline. This study presents a comprehensive investigation into the microstructure, mechanical properties, and fracture characteristics of X80 steel welded joint...
This study investigates the fatigue behaviour of wire arc additively manufactured (WAAM) aluminium alloys, emphasizing the role of pore in fatigue life assessment. Using a multiscale experimental and simulation approach, it was found that fatigue life is highly sensitive to pore size, with larger pores significantly reducing durability. However, an...
Tungsten (W) exhibits desirable properties for extreme applications, such as the divertor in magnetic fusion reactors, but its practicality remains limited due to poor formability and insufficient irradiation resistance. In this work, we study the intrinsic ductility of body-centered cubic WTaCrV based high entropy alloys (HEAs), which are known to...
The microstructure and mechanical properties of GNP-reinforced aluminum composites obtained by powder metallurgy and hot extrusion (at 400 °C, 500 °C, and annealing at 3 h at 610 °C), were investigated. It was found that: (i) depending on the processing applied, the composites showed an increase in yield strength (YS) and ultimate strength (US) of...
The variation in roof structure induced by changes in bedrock thickness exerts a direct influence on the stress distribution within lower strata, consequently governing the stability of roadway surrounding rock. To investigate the impact of bedrock thickness variations on overburden fracture behavior and stress evolution in deep-buried thick loose...
Microseismic analysis reveals that fracturing in multicluster horizontal wells can generate complex hydraulic fracture networks in heterogeneous formations. Nevertheless, precisely characterizing the three-dimensional (3D) configuration of hydraulic fracture networks and stimulated reservoir volume (SRV) remains a challenge. A coupled flow-stress-d...
Multi-Material Laser Powder Bed Fusion (MM-LPBF) offers a novel approach for fabricating high-resolution components with both spatially tailored material properties and design by leveraging selective powder deposition (SPD) in conventional LPBF processing. This study analyzes the effect of build orientation as a contributing factor to material comp...
Microwave fracturing and assisted mechanical breakage hold great potential for efficiency enhancement and energy conservation of hard rock excavation. However, the mechanism of microwave-assisted rock breaking has not yet been comprehensively revealed. In this study, the sandstone specimens are initially treated with the microwave power level of 1–...
Coal and gas outburst is a complex dynamic phenomenon happened in the underground of coal mines, and it has been a serious threat to the safe and efficient production of mines. To investigate the intricate mechanisms at play, a large-scale coal and gas outburst test was conducted based on the prototype of outbursts induced by coal uncovering. Coal...
Glued-in rod (GiR) timber joints, featuring a composition of a rod, adhesive (glue), and timber, play a pivotal role within the mass timber construction industry where the performance of the GiR connections is imperative for the success of massive timber-based structural systems. However, the intricate mechanical complexities inherent in the load-d...
Smart material applications, such as piezoelectric actuators, have emerged as effective methods for repairing cracks in aircraft structures due to their electromechanical properties. Numerous studies have been conducted using finite element (FE) simulations; however, there is a lack of parametric studies utilizing advanced computing technologies. T...
The current work investigates the possibility of strengthening grain boundaries by nanoprecipitates using a CrCu coating model system. To this end, two compositions with 30 and 40 at.% of Cu and a balanced amount of Cr were synthesized via physical vapor deposition. The coatings exhibited a thickness of 1.8 μm and a Cr-based solid solution was dete...
Compared with single coal seam mining, the stratum damage induced by shallow multi-seam mining is more severe and poses a risk of mine disasters that threaten the safety of coal mine personnel. In order to reveal the characteristics and mechanism of strata damage, in this paper, field measurement, numerical simulation and mechanical analysis are us...
The next generation of acoustic emission (AE) applications in concrete structural health monitoring (SHM) relies upon a reliable and quantitative relationship between AE measurements and corresponding AE sources. To achieve this, it is a prerequisite to accurately model the whole AE process that is a multiscale coupling process between local mater...
The influence of the chemical composition on the brittle fracture behaviour of quenched and tempered low alloy bainitic steels was investigated thanks to the laboratory elaboration of three model alloys which have underwent a heat treatment to improve their chemical homogeneity. Two model materials with chemical compositions simulating zones of lar...
Stone armatures are privileged archaeological evidence to inform us about Palaeolithic hunting technology, and macro- and microscopic traces have been demonstrated to be reliable indicators of projectile use. Researchers have used a broad range of criteria for the identification of projectiles, including morphometrics, diagnostic impact fractures o...
In this research, the compressive behavior of closed-cell aluminum foam was examined across a broad strain rate spectrum, spanning from 0.005 s⁻¹ to 2000 s⁻¹. Utilizing an enhanced Hopkinson bar apparatus, the deformation and fracture mechanisms of the foam were captured through high-speed videography. Additionally, a microscale finite element mode...
We employed the nonlinear finite element software ANSYS LS-DYNA 19.0 to develop a coupled dynamic-static load model for shale oil reservoirs in the Qianjiang Depression through theoretical analysis and numerical simulation and to investigate an oil extraction technology by improving oil yield while maintaining environmental sustainability of Qianji...
Jointed soft-hard composite rocks are frequently encountered in nature, and this complex structure contributes to unpredictable fracturing mechanisms and failure behavior. In this study, soft-hard composite rocks with three joints were fabricated to conduct a uniaxial loading experiment, supplemented by Digital Image Correlation (DIC) and Acoustic...
The strength of a transversally isotropic cylinder with a system of healed torsional cracks is investigated in this paper. Degradation of service characteristics of the reinforced-concrete materials in APP structures, mine shaft s, collectors, and hydraulic works delved into the necessity of serviceability renewal, repair, and the restoration of ca...
It is of great significance to study the fracture mechanism of defect-bearing rocks. Through the uniaxial compression test and discrete element numerical simulation on the fixed inclination parallel-fissured sandstone, the mechanical properties, fracture mechanism and acoustic emission full dynamic time-varying evolution law of sandstone with diffe...
Fibrillar adhesion, observed in animals like beetles, spiders and geckos, relies on nanoscopic or microscopic fibrils to enhance surface adhesion via ‘contact splitting’. This concept has inspired engineering applications across robotics, transportation and medicine. Recent studies suggest that functional grading of fibril properties can improve ad...
Based on CALPHAD-guided alloy design, key experimental investigations, and first-principles calculations, this study explores the melting characteristics, microstructure, mechanical properties, and fracture mechanisms of Sn-0.5Ag-0.7Cu-3Bi-xIn (x = 4, 8, 12, 17, wt.%)/Cu solder joints. Research reveals that In doping lowers the solidus, liquidus, a...
The cross-section effect leads to variations in the microstructure and thickness of marine engineering steel thick plates, which may result in delaminated tearing and a reduction in material plasticity and fracture toughness. The microstructural characterization of the matrix and the regions near the impact fracture at different depths by the thick...
The causes of jadeite “structural cotton” are complex and varied, and are the result of a combination of factors in an ecological context. Jadeite “structural cotton” not only has a unique appearance, but also its formation mechanism with the conventional emerald there are obvious differences. In view of the exquisite adaptation of organisms to the...
These authors contributed equally to this work. Abstract Predicting crack trajectories in brittle solids remains an open challenge in fracture mechanics due to the non-local nature of crack propagation and the way cracks modify their surrounding medium. Here, we develop a framework for analytically predicting crack tra-jectories, similar to predict...
Even local small cracks may induce instability and failure or operativity loss before the crisis for the intact material is actually attained. Thus, damage models and the possibility of their identification have become trendy subjects in structural mechanics. We previously studied buckling and post-buckling of parabolic arches with a local transver...
Plain Language Summary
Dikes and sills play a key role in volcanic systems by storing and helping magma move beneath the Earth's surface, affecting volcanic eruptions and the formation of igneous rocks. However, the resistance of rocks to the propagation of these cracks, known as fracture energy, varies widely and is not well understood. This study...
Rock failure, which causes instability in rock engineering, is an engineering accident that generally occurs through the coalescence of the preexisting cracks in rocks. Therefore, it is very important to research the coalescence of rock cracks to prevent rock engineering accidents. Based on the mechanical theories of elastoplastic mechanics and fra...
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The deformation and instability of overlying strata is the root cause of roof dynamic disasters. Therefore, it is necessary to study the geomechanical behavior of overlying strata and the evolution law of three‐dimensional fracture morphology for preventing rock burst disasters and identifying the source of mine earthquakes. To solve the problem of...
Dynamic loading along the rock joints from factors such as thermal loads, excavation, and seismic wave velocity further exacerbates susceptibility. It is crucial to restore the strength of such rock masses using appropriate techniques to enhance the stability of slopes and tunnels and mitigate future distress and damage. This study investigates the...
The present study focuses on the computation of interfacial excess potential for the cohesive zones through which a brittle crack propagates in tungsten (W) twist grain boundaries (TGBs). Additionally, the influence of phosphorus (P) impurities is investigated. To this end, we have performed classical atomistic modeling of several ⟨110⟩ TGBs in the...
The bolted joint is a crucial component of a steel structure, directly impacting the safety and reliability of the entire structure. At present, the linear elastic theory is used in the joint design of steel structures, but it fails to reflect the process of crack initiation and propagation clearly. The traditional methods of fracture mechanics, fi...
Hydraulic fracturing is a widely used stimulation method to enhance the productivity of unconventional resources and it has become an indispensable part of well completion in shale oil and gas field development. The complex hydraulic fracture network is strongly influenced by the interaction between the hydraulic fracture (HF) and the bedding plane...
The mechanism of cavity growth in a UCG process is mainly dependent on the presence of fractures and microcracks in the coal seam. In this study, the rate of cavity growth and the crack propagation mechanism in brittle coal samples under high thermal conditions are investigated using a two‐dimensional particle flow code (PFC2D). Coal samples with d...
The main contribution of the present work is the display of the impact of the addition of SiC into the aluminum alloy Al6061. For this reason, the Mode I stress intensity factor KI and T-stress for compact tension CT specimen are evaluated using 3D finite element analysis (FEA). The material used here in the compact tension CT specimen is Al6061-Si...
The material mismatch between the dissimilarly oriented plies within laminated structures induces localised singular interlaminar stresses at free edges, under various loading conditions such as mechanical, moisture, or thermal. These interlaminar stresses lead to premature interlaminar cracking. This study introduces the application of Finite Frac...
A mathematical model for crack-tip fields is proposed in this paper for the response of a three-dimensional (3-D) porous elastic solid whose material moduli are dependent on the density. Such a description wherein the generalized Lam\`e coefficients are nonlinear functions of material stiffness is more realistic because most engineering materials a...
The shear-based fracturing of deep fractured rocks under compression-shear
loading is one of the most prevalent failure modes due to the existence of in situ stress. In order to study the shear fracture mechanical properties of fractured rocks, a doubleedge cracked flattened Brazilian disc (DCFBD) sample was developed by introducing two platforms i...
A novel hot-melt cyclic olefin-based adhesive was designed as a transparent, non-tacky film of amorphous thermoplastic with a unique polymer micro-structure. The aim of the present paper is to assess the mechanical properties of the 0.1 mm thick COP hot-melt adhesive film through adhesive characterizations tests. The glass transition temperature wa...
Strain hardening is a key feature observed in many rocks deformed in the so-called ‘semi-brittle’ regime, where both crystal plastic and brittle deformation mechanisms operate. Dislocation storage has long been recognized as a major process leading to strain hardening. Here, it is suggested that tensile microcracks may be viewed as dislocation sink...
This study aims to investigate the mechanical properties and energy characteristics of coal-rock combinations during uniaxial compression, specifically focusing on variations in interface inclination angles. Each of the stress–strain curves of the CRC (Coal-Rock-Like Material Combination) with varying interface inclination angles were obtained usin...
To standardize the reliability test evaluation schedule of passenger cars powertrain, a multi-condition varying-speed accelerated test criteria correlated with the statistical data of target vehicles is developed. With this test criteria, a real-vehicle test is conducted to evaluate a trial-manufacture car equipped with a newly developed transmissi...
Liquid nitrogen (LN2) fracturing technology is an innovative method for enhancing geothermal energy extraction from hot dry rock reservoirs. This study investigates the impact of LN2 cooling on the mechanical properties of granite subjected to varying pre-heating temperatures. Experiments including ultrasonic testing, Brazilian splitting tests, and...
This study aims to explore the influence of random pore characteristics inside rock mass on the fracture mechanical properties of rock under tensile stress. By means of numerical simulation based on the improved smoothed particle hydrodynamics (SPH) method, a specific kernel function approximate integral interpolation form and discrete particle sup...
This paper employs in situ Electron Backscatter Diffraction (EBSD) tensile technology to thoroughly consider the evolution of microstructure, grain size, grain boundary characteristics, orientation differences, and dislocation density of H13 steel during the elastic and plastic stages of room temperature tensile testing. The study unveils the defor...
Carbon-fiber-reinforced polyetheretherketone (CF/PEEK) composites are being increasingly used in aerospace, biomedical, and other industries due to their superior mechanical properties. However, CF/PEEK structural components require secondary processing after curing and molding to meet connection and assembly precision requirements. This process, h...
Laboratory experiments on fault rocks mostly show static friction coefficients in between 0.5 and 0.8 in agreement with the Byerlee’s results (Byerlee, 1978). Several exceptions are reported for rheologically weak rock samples, e.g., phyllosilicates and serpentinites (Tesei et al., 2012; Pozzi et al., 2023), with friction values as low as 0.2. Geod...
The crack width assessment and reliable modeling of the crack localization process are essential for accurately modeling crack propagation, which is critical for evaluating deflections, serviceability limit states, and the redistribution of internal forces, which influence ultimate limit states. This paper examines various modeling approaches and t...
Tunnel collapse is a critical issue in geotechnical engineering, affecting the safety, functionality, and economic viability of underground structures. This study examines the primary failure mechanisms of tunnels, including roof instability, shear failure of sidewalls, base heave, wedge failure, and progressive collapse, with a particular focus on...
This study examines the deformation behaviour and fracture mechanisms of bimetal composites (BCs) composed of high-carbon medium-manganese steel (Mn8) and low-carbon steel (SS400), fabricated through hot roll bonding. The research highlights the effect of varying thickness ratios on the mechanical properties of Mn8/SS400 BCs. The microstructure and...
There is much discussion today about the possibility of extending the lifetime of industrial plant components due to economic factors. Pressure vessels are among the most expensive components, and their replacement can significantly impact the operation of an entire plant. In this context, several Fitness-for-Service (FFS) methodologies can be appl...
Red sandstone is widely distributed in southern China. Due to the significant difference in mechanical properties before and after hydration and its poor water stability, red sandstone often triggers landslide accidents. In this paper, red sandstone from an open pit slope in Jiangxi Province was taken as the research object. Two variables, namely t...
Variational phase field fracture models are now widely used to simulate crack propagation in structures. A critical aspect of these simulations is the correct determination of the propagation threshold of pre-existing cracks, as it highly relies on how the initial cracks are implemented. While prior studies briefly discuss initial crack implementat...
Chemical Equilibrium Fracture Mechanics (CEFM) studies the effect of chemical reactions and phase transformations on crack-tip fields and material fracture toughness under chemical equilibrium. An important CEFM direction is hydrogen-induced embrittlement of alloys, due to several industrial applications, including those within the industrial value...
Seismic and geodetic observations show that slow slip events (SSEs) in subduction zones can happen at all temporal and spatial scales and propagate at various velocities. Observation of rapid tremor reversals indicates back‐propagating fronts traveling much faster than the main rupture front. Heterogeneity of fault properties, such as fault roughne...
In this paper, an accelerated bending fatigue test method for the crankshaft was proposed based on the combination of the extended Kalman filtering algorithm method (EKF) and different failure criterion parameters. First the intrinsic frequency of the system and the fatigue crack depth were chosen to be the failure criterion parameters based on the...
Kegagalan akibat kelelahan material dapat berpotensi fatal karena dapat menyebabkan fraktur tanpa deformasi awal yang terdeteksi. Faktor-faktor seperti beban maksimum yang tinggi dan siklus tegangan yang besar mempercepat proses kelelahan material. Dalam desain robot exoskeleton ekstremitas bawah, kekuatan dan keamanan robot menjadi fokus utama, te...
In this work, the validity of Linear Elastic Fracture Mechanics (LEFM) for measuring the energy release rates for adhesively bonded carbon fibre reinforced plastic (CFRP) joints under Mode II and Mixed Mode I/II loading, using end loaded split (ELS) and fixed ratio mixed mode (FRMM) specimens respectively, has been investigated. The G values determ...
Acceleration of fatigue crack growth in steels under hydrogenating environments (hydrogen-assisted fatigue crack growth, HA-FCG) is of critical concern for the defect-tolerant engineering design of pressure vessels and pipelines for the storage and transportation of gaseous hydrogen. This overview provides a state-of-the-art understanding of the HA...
In the metal additive manufacturing (MAM) scenario, metal-polymer-based systems such as material extrusion (MEX) and binder jetting (BJ) are gaining increasing interest as they are expected to provide production cost savings alongside increased productivity compared with well-established powder bed fusion (PBF) and direct energy deposition (DED) te...
The fracture behavior of gadolinia-doped ceria (GDC) electrolytes under complex mechano-electrochemical conditions is significantly affected by various factors, especially when microcracks are present within the material. This paper develops an atom-to-continuum (AtC) multiscale method that integrates molecular dynamics (MD) simulations with the fi...
Adhesively bonded joints offer numerous advantages for industrial applications. However, because damage and failure in adhesively bonded joints occur within thin adhesive layers between stiff adherends, experimental characterization and numerical simulation that account for microscopic phenomena are particularly challenging. For adhesively bonded c...
Directly recycled AA6061, valued for its energy-efficient production and reduced environmental impact compared to primary aluminium, exhibits unique mechanical properties due to microstructural changes during recycling. Behavioural analysis under various loading conditions, including tensile and impact tests, reveals mild ductility and anisotropic...
The fracture evolution and the strength characteristics of a jointed rock mass under hydro-mechanical coupling are key issues that affect the safety and stability of underground engineering. In this study, a kind of transparent rock-like resin was adopted to investigate the crack initiation and propagation modes of the 3D flaw under hydro-mechanica...
In civil engineering, stress corrosion cracking (SCC) is a common cause of premature failure in steel wires, and effective solutions are currently limited. Investigating the SCC behavior of steel wires with different strength levels is crucial for understanding its fracture mechanism and developing potential solutions. This study examines the SCC b...
This study investigates the integration of the universal discontinuity index (UDi) into digital twin (DT) models of rock masses, presenting a novel quantitative statistical semantic damage model (QSSDM) that aligns with the digitalization advancements of Industry 4.0. Unlike traditional empirical classification systems such as RMR, Q system, GSI, a...
The presence of holes significantly influences crack growth behavior in elastic-plastic material under monotonic loading. This work focuses on experimentally evaluating the J-integral to understand the effect of holes on crack propagation in SS304. A modified approach is developed to derive the geometry-dependent f (a/W) function for the J elastic...
The efficiency of mechanical pulping has long been of interest due to the large energy consumed by the process. Previous estimates of theoretical efficiency have accounted for less than 20 % of the energy employed. In this study, we make new estimates based on fracture mechanics and abrasion as the mechanisms of new surface creation. We postulate t...
The fundamental understanding of the root causes of failure requires information on atomic-scale processes. Molecular dynamics (MD) simulations are widely used to provide these insights while maintaining chemical specificity. However, the boundary conditions that can be applied in MD fracture simulations are limited to the linear-elastic fracture m...
Interfacial shear fracture behavior of C18150Cu/1060Al/C18150Cu trilayered composite at different temperatures, which was fabricated by high-temperature oxygen-free hot rolling technology. The interfacial microstructure, interfacial shear strength, interfacial shear fracture morphology, and microstructure near the shear fracture were systematically...
The pillar burst disaster in deep engineering significantly constrains project construction. To reveal the fracture mechanism of rock pillars under instantaneous unloading, a self-designed rigid true triaxial experimental apparatus, equipped with two high-speed cameras and an acoustic emission (AE) monitoring system, was utilized to conduct instant...
To examine the influence of hole depth on the mechanical properties of rock, a series of uniaxial compression tests were performed on six groups of pre-drilled sandstone samples, each with varying depths. Also, multiple physical fields coupled with acoustic emission (AE) and digital image correlation (DIC) systems were synchronously employed to mon...
To investigate the effect of acid fracturing fluid on the fracture toughness and fractal properties of crack propagation in Qinshui coal under impact load, the 50 mm diameter split Hopkinson pressure bar device was employed to carry out mode I dynamic fracture toughness tests on Qinshui anthracite samples treated with acid fracturing fluid and wate...
