Abaqus - Science topic

Composite steel decking concrete slabs are an important structural member in building construction. Research on its thermal behavior should be developed to understand its fire performance. In this paper, a comparison of the temperature distribution in the cross-section of steel decking concrete slabs subjected to fire is made through three differen...

Nowadays, orthopedic fixation devices are used in treating spine diseases, but osteoporosis is the most common challenge for lumbar interbody fusion with pedicle screws. In the elderly population of the world, osteoporosis has become a common disease, which is a concern for spine surgeons because most of the patients who need lumbar interbody fusio...

In this paper, a novel semi-analytical model is developed to capture the mode jumping phenomenon in composite and metallic pressurized fuselage panels. The analytical formulation is derived using the Ritz-based approach and the resulting system of nonlinear equations are solved numerically by homotopy methods. Panels with two different aspect ratio...

In recent years, the scientific community has shown a growing interest in fiber-reinforced concrete (FRC) for modern structures due to its enhanced ductility compared to traditional reinforced concrete (RC). This paper introduces an analytical model that incorporates a comprehensive fiber reinforcing index (RI) to study various types of FRC. The an...

In the past century, in many industries, such as, metal forming industry, it has been important to predict ductile damage and fracture of metals under complex loadings. Regarding damage mechanics, one of the most classical models is the GTN, which was originated from Gurson and later enhanced by Tvergaard and Needleman. The inprovement was achieved...

This research investigates the explosive behavior of reinforced concrete frames retrofitted with wasp nest dampers. One effective solution for minimizing structural damage is the implementation of dampers, which function by absorbing energy and thereby reducing damage resulting from applied loads. One of the relatively recent damper types used is t...

In this study, a new approach, for identification and characterization of straight cracks in plates-like structures, is presented. The finite element method using a commercial software (Abaqus)is coupled with successful history-based adaptive differential evolution algorithm (SHADE) which, ensures the minimization of the objective function based on...

Suspended floors can be designed as effective pendulum seismic isolators for high-rise buildings. However, research studies on the free vibration of suspended laminated composite slabs are relatively limited. This paper presents a comprehensive analytical solution to the free vibration problem of suspended laminated composite slabs. The equations o...

Body armor refers to any protective garment worn to defend the body from physical assaults. There have been significant advancements in the development of bulletproof body armor. Many studies have been conducted, and it has been found that body armor made of composite ballistic material is more effective than traditional steel body armor because it...

This paper presents a numerical study on the vertical (axial) and lateral (flexure) behavior of CFST (Concrete-Filled Steel Tube) columns with active hoop prestress achieved by bolting together two steel half-tubes. Twelve prototype CFST column specimens differing in the prestressing force (three levels) and in the gravity loading ratio (four level...

Ductile damage models and cohesive laws incorporate the material plasticity entailing the growth of irrecoverable deformations even after complete failure. This unrealistic growth remains concealed until the unilateral effects arising from the crack closure emerge. We address this issue by proposing a new strategy to cope with the entire process of...

The working temperature of any 3D printer has a critical effect on process feasibility as well as the final quality of the product. In this respect, thermal analysis can provide a comprehensive understanding of operation parameters and optimization potential. This most certainly also is the case for the new layer-wise additive manufacturing system,...

In current design procedures, the capacities of single-shear timber connections with lag screws are determined based on their governing failure modes, which are assumed to occur independently. In this study, the capacity and failure modes of single-shear timber connections with lag screws are evaluated experimentally and numerically. Six specimens...

Objective This study aimed to provide evidence for the clinical application of single short implants by establishing an anisotropic, three-dimensional (3D) finite element mandible model and simulating the effect of crown-to-implant ratio (CIR) on biomechanics around short implants with different osseointegration rates. Methods Assuming that the bo...

بیش از نیمی از انرژی مصرفی در کشاورزی صرف عملیات خاک¬ورزی می‌گردد. شناسایی صحیح عوامل مؤثر بر خاک¬ورزی و رطوبت خاک سبب تعیین شرایط بهینه وضعیت کار ادوات خاک¬ورزی می‌شود. طراحی و ساخت ادوات خاک¬ورزی مناسب، نیازمند داشتن دانش فنی کافی از تأثیر متقابل خاک و ابزار است. در این تحقیق، ابتدا برهم¬کنش بین ابزار خاک ورز و خاک در یک انباره خاک در مقیاس آزمای...

Masonry arch structures are one of the oldest forms of construction of human civilization. These types of structures have been used since ancient times, and many old arch structures still stand without any major damage. The performance of masonry arch structures under static and dynamic loads is an active field of research, as these structures have...

Structures may suffer damage and even collapse as a result of natural disasters like earthquakes and floods. The degree of damage may vary depending on the loading level under service conditions, making repair operations urgently necessary. Due to the use of very simplified models to simulate the post-cracking behavior of the concrete, the requalif...

This paper presents static and dynamic stress analyses of an axial fan blade, which were carried out under real life centrifugal and aerodynamic loading conditions using the Abaqus software. The location of the crack was identified on the pressure side of the blade at the conjunction between the blade and the blade root. It reveals a high agreement...

Plate anchors offer a cost-effective anchoring solution for offshore floating energy devices. This study aims to investigate the uplift capacity of horizontal plate anchors in dense sand using the critical state-based model NorSand implemented in finite element (FE) software Abaqus. Both drained and fully undrained simulations were conducted to stu...

This paper presents static and dynamic stress analyses of an axial fan blade, which were carried out under real-life centrifugal and aerodynamic loading conditions using the Abaqus software. The location of the crack was identified on the pressure side of the blade at the conjunction between the blade and the blade root. It reveals a high agreement...

Subsea pipelines and cables placed in ice-prone regions may be at risk of iceberg damage. In particular, pipes that are not buried may come in direct contact with iceberg keels. Knowing the range of interaction forces helps to assess the types and magnitudes of potential damage. Experimental studies provide the most valuable data about the interact...

Hollow concrete columns are often employed in bridge constructions because of their lighter weight and effective section characteristics. In addition, to reduce the issue of steel reinforcement corrosion and create a strong and light construction, hollow section columns are also reinforced with bars made of fiber-reinforced polymer. This research a...

An unbraced network arch bridge was constructed to carry the 2 nd Avenue traffic over the interstate (I) 94 in Detroit, Michigan. The bridge is 265 ft long, 96.5 ft wide, and 18-degree skew and comprises of posttensioned concrete tie girders, posttensioned concrete knuckles, posttensioned concrete end diaphragms, transverse steel floor beams, later...

The use of Bubble Deck in modern prefabricated construction methods has recently become widespread in industrial projects worldwide. In the middle of a typical slab, Bubble Deck places hollow plastic balls that do not improve structural performance but significantly reduce structural weight. This study analyzes the behavior of self-uniting bidirect...

As a joints play a significant role in load transfer both in persistent and accidental situation an attempt to improve structural robustness under column loss situation was made. Based on previously conducted experimental tests of bolted double side steel end-plate joints and numerical analysis a development to increase loadcapacity and rotational...

With the global rise of cardiovascular disease including atherosclerosis, there is a high demand or accurate diagnostic tools that can be used during a short consultation. In view of pathology, abnormal blood flow patterns have been demonstrated to be strong predictors of atherosclerotic lesion incidence, location, progression, and rupture. Predict...

Limb injuries frequently necessitate orthotic bracing, and the utilization of material extrusion (MEX) additive manufacturing (AM) or 3D printing offers a rapid and cost-effective means of producing orthoses. These characteristics are highly sought after in today's orthotic market. The study focused on the mechanical strength analysis of the wrist-...

Fatigue failure of carbon fiber-reinforced plastics (CFRPs) under cyclic loadings has attracted the attention of researchers recently. In this study, the entropy-based failure criterion is proposed to investigate the fatigue lifetime of unidirectional CFRPs subjected to multiple-amplitude cyclic loadings. Due to the heterogeneity of CFRPs, a micro-...

Sandwich panels can be utilised as blast absorbing sacrificial structures using their plastic deformation potential. To the authors’ knowledge, sandwich panels with connected (welded or bolted) corrugated layers has been well investigated by researchers. Therefore, the objective of this study is to create a new, inexpensive, graded sandwich panel w...

Single-point incremental forming (SPIF) is a technology that allows obtaining complex parts using a hemispherical end tool by applying a local deformation process in sheet metal. This dieless process presents the advantage of high formability limits and low cost. The increasing need for micro-components, namely, in the medical industry (implants an...

Shape optimization, as one of the types of structural optimization problems, is an important process in the design of shells, since it contributes to the creation of a structure with fine performance characteristics, expansion of design variations and knowledge base to obtain high-quality results. To solve the problems associated with determining t...

The performance of the spherical hinge structure, which is the core component in the rotating construction, determines the success or failure of the swivel process. Most related studies have simplified the spherical hinge, only considering the upper and lower spherical steel plates as a friction subset and ignoring the middle wear plates, so it is...

Polyester composites play a vital role in civil engineering applications, especially in bridge and car park structures. Therefore, the addition of waste silica-based fillers will both improve the mechanical and durability performance of composites and produce an environmentally friendly material. In this study, the mechanical performance of polyest...

Determining the mathematical structure of the stored energy for hyperelastic materials that predicts the experimental data well can prove to be complicated. For instance, the mechanical response of the brain tissue exhibits a complex shear response in the combined tension/compression and shear loading because the shear modulus in tension and compre...

Multi-spar composite boxes (MSCB) are common elements in structural design due to their high load capacity in different loading conditions. This paper presents an experimental and numerical investigation of the failure behavior of MSCB subjected to a combined bending-shearing load. Quadratic failure criteria and mixed-mode strain energy release rat...

In suspended-dome structures, cable-strut joints can be categorized into discontinuous joints and continuous joints. In calculations, the discontinuous joints can be treated as hinge joints. However, in the event of a cable breakage, the continuous joints might experience slip and detachment phenomena. Simplifying continuous cable-strut joints as h...

Collagen substrates in flexible electronics emerged as an alternative to the commonly used stretchable synthetic polymers such as polyethylene terephthalate, polyether sulfone, polydimethylsiloxane etc., thanks to their biocompatibility, flexibility and piezoelectric behaviour. Although researchers were successful in manufacturing these flexible-el...

During manufacture, handling, transportation, installation and operation, mechanical overstress can affect the electrical and thermal properties of the conductor. As the wires in general are made of copper, which is a very plastically deforming material, these stresses will gradually generate plastic deformations of the copper until the wires start...

This study presents the development and experimental verification of a simulation model for estimating the local microstructure of a tool geometry after heat treatment. The experiment involved subjecting a metallic block of dimensions 40 × 50 × 50 mm, made of the ledeburitic cold work steel DIN EN 1.2379 (X153CrMoV12; AISI D2), to a heat treatment...

Multi-layer fabrics are commonly used in ballistics shields with a lower bulletproof class to protect against pistol and revolver bullets. In order to additionally limit the dynamic deflection of the samples, layers reinforced with additional materials, including non-Newtonian fluids compacted by shear, are additionally used. Performing a wide rang...

This study presents a numerical investigation on the use of previously unexplored hybrid sandwich protective structural configurations with aim to resist airblast loading. A honeycomb, corrugated sheet, and woven interlaced core configurations are used to develop the hybrid system. An experimental result reported in the previous literature is used...

It is possible to analyze trusses and frames manually and using relations to the extent that the geometric conditions and loading of the problem are simple to a great extent and the number of elements and members of the truss or frame does not exceed a small number. But in real problems, loading and dimensions are complex and the number of elements...

In this work, the first two-dimensional mesoscopic model has been implemented to study the mechanical behaviour of concrete reinforced with recycled tire rubber as an aggregate. In particular, the replacement of different percentages of coarse aggregate by rubber has been analysed. Four phases have been discretized for the modelling: the aggregate,...

The present numerical study focuses on the problem of dynamic interaction of piled foundations under harmonic excitation at high frequencies relevant for the vibration protection practice. The finite-element programs Plaxis (2D & 3D) and Abaqus are employed for time- and frequency-domain analyses, respectively. As a first step, dynamic impedances...

Bridges are among the most vulnerable structures to earthquake damage. Most bridges are seismically inadequate due to outdated bridge design codes and poor construction methods in developing countries. Although expensive, experimental studies are useful in evaluating bridge piers. As an alternative, numerical tools are used to evaluate bridge piers...

This investigation focuses on the synergistic performance improvement in graphene/MWCNT reinforced polyaryletherketone (PAEK) - carbon fabric (CF) multiscale composites. FTIR revealed the chemical interactions while HRTEM, XRD and 3D X-ray microscopy gave insight into nanofiller dispersion and microstructural features. The functional groups on nano...

Citation: Mousavi, S.S.; Askarian Khoob, A. Effect of Ultra-Lightweight High-Ductility Cementitious Composite in Steel-Concrete-Steel (SCS) Plate to Mitigate Ship Slamming Loads. Abstract: Bottom slamming loads cause considerable local damage to a ship's body and reduce the ship's structural performance against harsh sea waves. Although extensive s...

Concentrated Solar Power (CSP) plants use mirrors to reflect and concentrate sunlight onto a receiver, to heat a fluid and store thermal energy, at high temperature and energy density, to produce dispatchable heat and/or electricity. The secondary mirror is a critical component in the optical system of certain Solar Power Tower plants (SPT), as it...

In this study, the thin-walled plate with the central open hole made of carbon-epoxy composite was investigated. The plate was tested in tension to investigate the mechanism of crack formation in the composite structure. The studies were carried out using two individual methods: experimental and numerical. In the experiment test, load was measured...

This paper presents a numerical study on the vertical (axial) and lateral (flexure) behavior of CFST (Concrete-Filled Steel Tube) columns with active hoop prestress; this transverse prestressing effect is achieved by bolting together two steel half-tubes. This study refers to new construction only (i.e., no retrofit). 12 prototype CFST column speci...

Many structural components and devices in combustion and automotive engineering undergo highly intensive cyclic thermal and mechanical loading during their operation, which leads to low cycle (LCF) or thermomechanical (TMF) fatigue crack growth. This behavior is often characterized by large scale plastic deformations and creep around the crack, so...

The utilization of sacrificial walls for safeguarding human life and critical structures presents a captivating subject within the realm of blast resistance design. Sacrificial layers can be strategically positioned in front of structures requiring protection, aiming to absorb the energy generated by blasts and consequently mitigate the impact of s...

Laser-assisted machining (LAM) is a promising technique to machine hard-to-cut materials. However, the selection of appropriate process parameters is critical in enhancing the process performance. This work presents a comprehensive 3D coupled thermo-mechanical model of LAM, which is applicable for any metal/alloy. The proposed model integrates mate...

نیاز روزافزون بشر به موادی با ویژگی های جدید سبب پیدایش مواد کامپوزیتی شده است.با این حال کامپوزیت ها نیز محدودیت هایی دارند و پاسخگوی همه نیازها نیستند. بنابراین بهبود خصوصیات مواد کامپوزیتی از موضوعات مورد توجه در عصر حاضر است. یکی از روشهای بهبود خصوصیات کامپوزیتها تعبیه مواد هوشمند در آنها است. آلیاژهای حافظهدار به عنوان یک نوع از مواد هوشمند،...

In recent years, due to its beneficial structural applications, castellated steel beam (CSB) is widely used in the construction industry. CSBs are beams with openings of different shapes in their web. CSB is fabricated from steel I-beams by cutting lengthwise along their web to form two separate parts which are then put together after shifting to c...

This research work presents the stress behavior of rib-deck weld joints in Orthotropic Steel Deck (OSD) railway bridges. It is essential to determine the most vulnerable load mode of the wheels for fatigue failure of OSD bridges and to improve the fatigue resistance of the welded rib-deck connection. Fatigue performance largely depends on the weld...

The article deals with the method of calculation of a pre-stressed beam for the first group of limit states without adhesion of wire-rope reinforcement with concrete (monostrand) in the curved position. To verify the plausibility of hypothesis, a numerical simulation was done in the software complex ABAQUS for stress-strain state with such beam unt...

The current study examines the numerical analysis of the laminar flow around a cylinder at various Reynolds numbers (0.1, 1.1, 20, 26, 50, 100, and 195). The research found that a steady state can exist for Reynolds number values of 0.1, 1.1, 20, and 26. However, the flow pattern becomes unstable at Reynolds numbers 50, 100, and 195, leading to the...

The existing Masing-type nonlinear soil constitutive models encounter the problem of relatively complex loading-unloading rules (eg, the "Extended Masing" rule) to describe the soil stress-strain hysteresis curve under the irregular cyclic loadings such as earthquakes. It will lead to a large number of state variables during the solution, which is...

1. Abstract Composite materials have been more and more used in transport, to lighting it and reduce fuel consumption and pollution. Composites have high specific stiffness (Elastic modulus/specific mass) and reducing mass and increasing stiffness of a structure is likely to lead to vibro-acoustic issues and potential discomfort to transport users....

Testing full-scale structures in the laboratory is neither always doable nor financially feasible, especially for large structures. Therefore, these structures are often modeled with Finite Element Analysis (FEA) software and packages, such as Abaqus, to understand their actual behaviors under special simulated loading and material-behavioral consi...

Damages due to complex loading or under natural disasters may cause progressive collapse (PC) in structures have not received much attention despite the importance of the potentially catastrophic impact of these types of deteriorations. When a structure is exposed to external excitations, an energy flow in the structural components is accumulated a...