Finite Element Modeling - Science topic

Although machine Learning has demonstrated exceptional applicability in thermographic inspection, precise defect reconstruction is still challenging, especially for complex defect profiles with limited defect sample diversity. Thus, this paper proposes a self-enhancement defect reconstruction technique based on cycle-consistent generative adversari...

Objective The distribution and size of the zone of the centers of resistance (ZCR) are critical for accurate orthodontic treatments and minimizing unexpected tooth movements. However, this information remains unclear for mandibular incisors and canines. This study aims to address these gaps in knowledge. Methods Finite element models of four inc...

Knowledge-driven modeling of structural dynamics relies heavily on the cognitive abilities of modelers and often struggles to address uncertain boundaries where multiple affecting factors generally exist, especially those currently not well understood. To address the issue, we present a new low-dimensional dynamical modeling approach, integrating d...

This work is concerned with the simulation of pavement behavior using the Finite Element Method (FEM) with the goal of predicting the appearance of cracks during its useful life. The developed method can help maintenance planning towards providing users with safety and comfort. The effects of both traffic loads and temperature variations are consid...

Piezoelectric micro-electro-mechanical-system (MEMS) loudspeakers are attracting growing research interest in the last years due to the increasing interest towards miniaturization required by new wireless audio devices. Finite Element Models (FEM) and Lumped Element Models (LEM) able to accurately simulate their linear response have been recently p...

Substituting normal concrete with ductile Engineered Cementitious Composites (ECC) is a promising way to address the safety and durability issues caused by cracking in steel-concrete composite structures. To realize a synergistic deformation behavior between steel and ECC, Perfobond Leiste (PBL) shear connectors are preferred to be used owing to th...

Lattice structures exhibit periodicity along three orthogonal axes, which limits their mechanical isotropy and design flexibility. In this study, the lattice structures with multifold rotational symmetries were proposed and designed based on body-centered cubic (BCC) structures. The specimens of the proposed structures were fabricated through laser...

Induction hardening is a heat treatment process that enhances the mechanical properties of materials, improving their resistance to fatigue, fracture, and wear. Unlike conventional methods, induction hardening selectively heats the surface of the material, forming a high-hardness layer while leaving the core relatively unaffected. In addition, it g...

After creating a new Finite Elements Model (FEM) of the aircraft IAR-99 HAWK using special elements, the team decided to validate the results by performing a free-free vibrations analysis on this model. In this presentation we have described the finite elements used and their peculiarities, the finite elements model obtained for the aircraft IAR-99...

The shear stress on isotropic curved beams with compact sections and variable thickness is investigated. Two new solutions, based on Cook’s proposal and the mechanics of materials approach, were developed and validated using computational finite element models (FEM) for four typical cross-sections (rectangular, circular, elliptical, and triangular)...

During the construction of elevated bridge pile foundations, the mechanical processes, including the extrusion and friction caused by the steel casing’s rotation into the soil and the soil pressure unloading due to soil extraction from pile holes, can significantly disturb existing structures. To address the engineering challenge posed by the plann...

When fastening components connected through friction contacts are subjected to tangential cyclic loads, slips may occur at the contact interfaces. Under multiple cyclic tangential load excitations, slips may be cumulative or shakedown. However, few reports have conducted experimental work on slip behaviors because local micro slips are difficult to...

During the operation of gas storage wells, due to factors such as circulating casing pressure, poor cementation quality of cement sheath interface and poor mechanical properties, cement sheath produces plastic strain accumulation, fatigue damage, etc., which cause safety problems such as wellbore structure failure. In order to protect integrity of...

This research examines the effect of thermomechanical and microstructural constituents on welding of AISI 316L (austenite stainless steel) and S275 steel. A Finite Element Model (FEM) was constructed using ANSYS 19.1, and an experimental study was conducted using the Rotary Friction Welding (RFW) process. It was determined that there is a genuine c...

Civil engineering structures face major challenges, particularly earthquakes, which are random phenomena in their intensity and frequency content. The seismic response of structures depends largely on the intensity of an earthquake and especially on its frequency content. Structural Health Monitoring (SHM) is a relevant tool for assessing the dynam...

In this paper, for the first time, the static bending and free vibration of bi-directional functionally graded (2D-FG) nanobeams partially resting on an elastic foundation are investigated. The nanobeams are composed of four material components and exhibit mechanical characteristics that vary smoothly and continuously along the thickness and length...

This research investigates the flexural performance of slabs reinforced with high-strength steel-strand mesh (HSSM) and engineered cementitious composites (ECCs). By employing finite element analysis (FEA) and theoretical modeling, this study aims to deepen the understanding of how these materials behave under bending stresses. A finite element mod...

This research introduces an efficient machine learning approach for predicting the structural health of long-span suspension bridges, focusing on their responses to dynamic environmental load like earthquakes and wind. Unlike traditional analytical methods that rely on simplifications, this study utilizes real-world data from ane-mometers and accel...

In order to investigate the interfacial bonding properties of high-strength steel stainless wire mesh-reinforced ECC (HSSWM-ECC) and concrete, a finite element model was established for two types of interfaces based on experimental research. The results show that the failure modes observed in the 21 groups of simulations can be classified into thre...

In the context of rising global temperatures, countries around the world are increasingly tailoring their own “carbon neutrality” plans. China has also formulated its “dual-carbon” goals, and the construction industry is gradually transitioning towards prefabrication to reduce carbon emissions. This paper uses the Sha Pu Station of Shenzhen’s Metro...

This study investigated numerically the behavior of slender austenitic stainless-steel grade EN 1.4420 columns under compression loads. The column has a single lipped Sigma cross section. The finite element model was developed using ABAQUS software, then it was validated by comparing its results against outcomes from a previous experimental study....

Micro/nano hierarchical structures could endow materials with various surface functions. However, the multilayer and multiscale characteristics of micro/nano hierarchical structures bring difficulties for their one step and controllable fabrication. Accordingly, based on tip-based fabrication techniques, this study proposed a micro-amplitude vibrat...

This study investigates the dynamic stiffness and damping characteristics of three polyurethane materials—PM, PS, and PST—using a comprehensive vibroacoustic testing approach. The aim is to examine material parameters such as dynamic stiffness, Young’s modulus, critical damping factor, and the influence of sample irregularities on the accuracy of m...

This work presents a novel variable-dimension accordion honeycomb structure capable of achieving circumferential deformation, characterized by its uneven structural stiffness properties. Unlike current accordion honeycombs, our design employs a variable-dimension honeycomb configuration defined in the polar coordinate system, using independent shap...

Porous materials and structures, such as subterranean fire ant nests, are abundant in nature. It is hypothesized that these structures likely have evolved biological adaptations that enhance their collapse resistance. This research aims to elucidate the collapse-resistant mechanisms of pore geometries in fire ant nests. Finite Element Models of ant...

Turn-to-turn short circuit faults in the primary winding of generator terminal voltage transformers can lead to erroneous operation of stator grounding protection systems. This paper analyzes the fault characteristics associated with such failures and derives formulas for the fault phase current and zero-sequence voltage during a turn-to-turn short...

In order to protect the precious cultural heritage of the pagoda in the mountainous area from the damage caused by falling rocks, we provide targeted and effective research support and protection strategy basis. ABAQUS finite element analysis software is used to accurately simulate and analyze the response of the pagoda under the impact load of fal...

The last stomatal division aligns with the leaf main axis in many species. Understanding how cellular events such as these are coordinated across organ scales remains a challenge in developmental biology. In Arabidopsis, polarised proteins guide the asymmetric divisions in the early stomatal lineage. These proteins show organ scale alignment and ma...

Shape measurement using multicore optical fiber sensors has attracted more attention in many fields due to the good consistency of the fiber cores. Three symmetrically arranged cores in a multicore fiber are usually used to reconstruct shapes by calculating the bending vectors, which will not be achieved when one of the cores is damaged or occupied...

Mathematical modeling of heat treatment processes necessitates dealing with inherent complexities such as large material property variations, phase transformations, complex inter-parameter couplings, and boundary conditions. A mathematical framework based on a finite element model capable of predicting temperature history and thus, the evolution of...

Transformation models have been widely used in geotechnical engineering to relate data from lab or field tests (e.g., cone penetration tests, CPT) to design parameters required in geotechnical analysis and design. Proper selection of transformation models is crucial but challenging for accurate prediction of geotechnical responses (e.g., reclamatio...

This study comprehensively investigates the temperature dynamics, fluid flow patterns, and moisture distribution during solar drying of Stevia rebaudiana leaves. Drying experiments were conducted using an indirect mode solar dryer (ISD) and mixed‐mode solar dryer (MSD), considering both natural convection mode (NCM) and forced convection mode (FCM)...

Personal care robots are assumed to be frequent contact with humans. Thus, the limitation of mechanical inputs should be clarified for the development of safety standards on human-personal care robot interactions. In our previous studies, in vivo impact tests has been conducted using anesthetized pigs in order to obtain the injury resistance thresh...

Vortex-induced vibrations are oscillatory motions experienced by a body interacting with an external flow. These vibrations can be harnessed for energy harvesting purpose. A cantilever beam with a cylinder attached at the free end represents the bluff-body oscillator of interest here. Vortex-induced vibrations of two adjacent bluff-body oscillators...

Compared with the traditional frame structures, the novel composite frame with replaceable steel links can realize the rapid recovery of building occupancy after seismic actions to provide the capacity of reducing structural damage and ensure the reuse of a structure. In this system, plastic deformation and damage mainly concentrated in the steel l...

This study investigated the seismic performance and assessed the seismic fragility of an existing pentapod suction-bucket-supported offshore wind turbine, focusing on the amplification of earthquake ground motions. A simplified suction bucket–soil interaction model with nonlinear spring elements was employed within a finite element framework, linki...

Linerless composite pressure vessels, or type V pressure vessels, are gaining increased interest in the transportation industry because they offer improved storage volume and dry weight, especially for low-pressure cryogenic storage. Nevertheless, the design and manufacturing of this type of pressure vessel bring several challenges due to the inher...

Measuring the sound absorption coefficient in a small reverberation room below the Schroeder frequency is a challenging task and the results are subject to a high degree of uncertainty. Recent research shows that the low-frequency acoustic properties of the enclosure and the test sample should be characterized by quantities that describe the modal...

Monopiles are typically the preferred foundation for offshore wind turbines, which are becoming increasingly large. While 3D finite element modelling can aid the design process of monopile foundations, achieving reliable results requires precise constitutive soil models and input parameters derived from laboratory and field data, as well as careful...

Given the unstable input of electricity generated by offshore renewable energy in connection to the power grid at present, one solution is energy storage technology. In recent years, the new marine gravitational energy storage technology has received wide attention in China and worldwide. To apply this new energy storage technology for use in the o...

To facilitate simulations in the design of electrical machines with a laminated core, often only a slice model is considered instead of the entire machine. We propose a method, where the expensive 3D eddy current problem of the slice model is replaced by a cheap static magnetic field problem with an effective material in a 2D finite element model....

Laser-assisted turning (LAT) involves locally heating a rotating workpiece using a focused laser beam before the removal of material. A key aspect in optimising productivity with laser-assisted turning is understanding the thermal relationship between laser heating, the improved material removal rate, and machinability. Consequently , in this paper...

After rolling, TP2 copper tubes exhibit defects such as sawtooth marks, cracks, and uneven wall thickness after joint drawing, which severely affects the quality of the finished copper tubes. To study the effect of drawing process parameters on wall thickness uniformity, an ultrasonic detection platform for measuring the wall thickness of rolled co...

The flexural buckling behaviour and residual resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire are studied in this paper, based on experiments and numerical modelling. Twelve column specimens, fabricated from concretes with three recycled coarse aggregate replacement ratios (0%, 3...

Dam monitoring is an effective method of the management of risk associated with dam operation. Interpretation of monitoring data is an essential part of the monitoring procedure. The main purpose of data interpretation in dams is the well-timed detection of hazardous conditions. Since numerical modelling such as finite element modelling method (FEM...

Hollow concrete compressive members (HCCs) are lightweight and stiff structural members. The main focus of the study described is to create a model using nonlinear finite element analysis that can precisely forecast how well HCCs are when reinforced with non-corrosive glass fiber-reinforced polymer (GFRP) bars and subjected to axial compressive loa...

Hybrid bonded-bolted (HBB) joining is common method used in aircraft assembly, particularly for critical junctions such as the wing-to-fuselage joint, to ensure both quality and durability. Accurate simulation of HBB joining presents a significant challenge, as it requires a proper description of the contact interaction of the assembled parts, the...

Living near overhead transmission lines has become more common nowadays, where magnetic field radiation has always been a public concern regarding the effect of MF radiation from OTL on the occurrence probability of cancerous diseases. In addition to the increasing trend of electricity consumption, people are getting more exposed to magnetic field...

This study investigates the flexural performance of steel trusses with concrete infill and gradient stiffeners at the joints. Three specimens were fabricated and subjected to flexural tests. A finite element model was developed and validated based on experimental results. This model was used to study the stiffness to evaluate the effects of concret...

To the fatigue performance of prestressed CFRP-reinforced steel plates with central defects and double-edge defects. Based on the team's self-developed self-bonding prestressed CFRP application device, fatigue tests of prestressed CFRP single-sided reinforced steel plates with defects under tensile cyclic loading were carried out for two defect typ...

This paper presents a novel configuration of built-up cold-formed steel (CFS) flooring system in the shape of a box section. A new technique is applied to produce the components of the flooring system, which are fastened by self-drilling screws. This box section consists of a cast-in-situ concrete slab, trapezoidal steel decking, two sigma section,...

In this paper, a widely used disc-buckle support frame is taken as the object, and parallel positive and negative bending tests are carried out on the connection nodes of the disc-buckle support frame. The failure mode, stress distribution law and bending resistance of the connection nodes of the disc-buckle support frame are systematically studied...

Fiber optic ultrasonic sensors, which are highly resistant to electromagnetic interference, are expected to be implanted inside electrical equipment to achieve high-sensitivity partial discharge (PD) detection. However, the influence of the fiber optic rings on PD parameters remains unclear. In this paper, a three-dimensional finite element model o...

To address the conservative excavator working device configuration obtained by traditional design methods, a lightweight structure design method was proposed in this study based on automatically generated surrogate model. A finite element model of the working device was first constructed, and its accuracy was verified against experimental results....

To address the issue of regional water resource scarcity, water diversion projects have been constructed worldwide. As an essential lifeline project, the prefabricated aqueduct is prevalently utilized in cross-regional water transfer and diversion projects. This paper was based on the prefabricated aqueduct project, which adopted fabricated technol...

As one of the key components of CNC machining centers, the structural performance of the saddle plays an important role in the machining accuracy of CNC machine tools. Taking the high-precision machining center of a certain factory as the research object, a finite element model of the sliding saddle is established. The ANSYS software is used to per...

This study focuses on the effect of window openings on the seismic performance of the stone walls of Tibetan and Qiang dwellings. A typical stone wall of a Tibetan and Qiang dwelling constructed using irregular stone and yellow mud masonry in Li County, Sichuan Province, was chosen as a prototype, and two stone walls with different structural windo...

Natural calamities have historically impacted operational mountainous power transmission towers, including high winds and ice accumulation, which can result in pole damage or diminished load-bearing capability, compromising their structural integrity. Consequently, developing a safety state prediction model for transmission towers may efficiently m...

Vibratory rollers are generally used in the process of highway subgrade compaction. In the paper, the vibratory roller—subgrade finite element model was established to simulate the field construction by using ABAQUS. We used Hilbert–Huang Transform to analyze the compaction in the field test from the time–frequency domain. By changing the parameter...

A novel slit-resonator acoustic metastructure (SRAM) composed of Helmholtz resonators and porous materials is proposed to achieve a continuous perfect sound absorption at 200–3000 Hz. The Helmholtz resonator utilizes the resonance effect for low-frequency acoustic energy attenuation, and when its neck is small enough, it can be considered as an air...

Using the quenching process to create a specific residual stress distribution in steel parts is a key method for improving their strength. Although finite element simulation can overcome the time-consuming and labor-intensive limitations of experimental measurements, accurately predicting the residual stress distribution in quenched steel parts rem...

Previous studies have primarily focused on converting point clouds (PC) into a dense mech of 3D finite element models, neglecting the conversion of PCs into as-built wireframe models with two-node elements for line elements such as beams and columns. This study aims to demonstrate the feasibility of this direct conversion, utilizing building framin...

RESUMO Este trabalho apresenta o BackCAP, um programa de computador para retroanálise de pavimentos que utiliza dados de ensaios deflectométricos realizados com o equipamento Falling Weight Deflectometer (FWD). O programa utiliza um modelo de elementos finitos para avaliar as respostas mecânicas do pavimento. São disponibilizados dois algoritmos de...