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Artykuły w czasopismach na temat „VUMAT user law”

Autor: Grafiati

Data publikacji: 7 grudnia 2024

Data aktualizacji: 31 lipca 2025

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1

Hu, Jing, Xiao Xing Li, Kwan Soo Chung, and Rao Yao. "Spring-Back Evaluation of Stretch Bending Process Based on Chaboche Combined Isotropic-Kinematic Hardening Laws." Advanced Materials Research 204-210 (February 2011): 1745–50. http://dx.doi.org/10.4028/www.scientific.net/amr.204-210.1745.

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We present a study on spring-back prediction in the stretching bending process using the Chaboche model combined isotropic-kinematic hardening law and Mises yielding criterion, and a material user subroutine (VUMAT, UMAT) program was developed base on the ABAQUS interface for the model. The effects of different hardening law on the spring-back in the stretch forming process was also analyzed and compared. The simulation results show that the combined isotropic-kinematic hardening law has the better spring-back prediction compared with the pure isotropic and kinematic hardening law in the stret

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2

Belova, O. N., D. V. Chapliy, and L. V. Stepanova. "APPLICATION OF THE UMAT SUBROUTINE FOR SOLVING CONTINUUM MECHANICS PROBLEMS (OVERVIEW)." Vestnik of Samara University. Natural Science Series 27, no. 3 (2022): 46–73. http://dx.doi.org/10.18287/2541-7525-2021-27-3-46-73.

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This paper presents an overview of the application of the UMAT subroutine of the SIMULIA Abaqus multifunctional software package in solid mechanics and related areas. This subroutine is used to describe new user materials that are not available in the class of standard materials of the SIMULIA Abaqus package. This overview article provides examples of problems and constitutive equations of materials that are modeled using UMAT / VUMAT procedures. Various types of materials are presented, successfully described by means of user-defined UMAT and VUMAT procedures. A general description and experi

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3

Ming, Lu, and Olivier Pantalé. "An efficient and robust VUMAT implementation of elastoplastic constitutive laws in Abaqus/Explicit finite element code." Mechanics & Industry 19, no. 3 (2018): 308. http://dx.doi.org/10.1051/meca/2018021.

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This paper describes the development of an efficient and robust numerical algorithm for the implementation of elastoplastic constitutive laws in the commercial non-linear finite element software Abaqus/Explicit through a VUMAT FORTRAN subroutine. In the present paper, while the Abaqus/Explicit uses an explicit time integration scheme, the implicit radial return mapping algorithm is used to compute the plastic strain, the plastic strain rate and the temperature at the end of each increment instead of the widely used forward Euler approach. This more complex process allows us to obtain more prec

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4

Zhao, Pengjing, Jingpin Jiao, Gang Fang, Zhanghua Chen, and Xiang Gao. "Investigation on tensile deformation and failure for 5052 aluminum alloy based on continuum damage model." Journal of Physics: Conference Series 2085, no. 1 (2021): 012039. http://dx.doi.org/10.1088/1742-6596/2085/1/012039.

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Abstract A VUMAT user material subroutine for the Lemaitre continuous damage mechanics model was developed based on the finite element solver ABAQUS/Explicit platform to investigate the deformation and failure behavior of 5052 aluminum alloy. The mechanical property parameters and damage parameters of 5052 aluminum alloy were identified by the inversion method combining tensile test and finite element simulation. The numerical simulation results showed that the force-displacement curves predicted by the established damage model were in good agreement with the experimental measurement, and the

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5

Lian, J., M. Sharaf, F. Archie, and S. Münstermann. "A hybrid approach for modelling of plasticity and failure behaviour of advanced high-strength steel sheets." International Journal of Damage Mechanics 22, no. 2 (2012): 188–218. http://dx.doi.org/10.1177/1056789512439319.

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The ductile damage mechanisms dominating in modern high-strength steels have emphasised the significance of the onset of damage and the subsequent damage evolution in sheet metal forming processes. This paper contributes to the modelling of the plasticity and ductile damage behaviour of a dual-phase steel sheet by proposing a new damage mechanics approach derived from the combination of different types of damage models. It addresses the influence of stress state on the plasticity behaviour and onset of damage of materials, and quantifies the microstructure degradation using a dissipation-energ

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6

Gao, Wei, Zhiqiang Yu, Aijie Ma, and Zhangxin Guo. "Numerical simulation of composite grid sandwich structure under low-velocity impact." Science and Engineering of Composite Materials 29, no. 1 (2022): 516–28. http://dx.doi.org/10.1515/secm-2022-0176.

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Abstract The low-velocity impact finite element model of the carbon fiber-reinforced composite grid sandwich structure was established by ABAQUS. Its panels and grid are both carbon fiber-reinforced composite laminates. The constitutive relation of composite laminates is written into the VUMAT user subroutine using the Fortran language. Simulation of intralaminar failure behavior of composite laminates using the three-dimensional Hashin failure criterion. The quadratic stress criterion and the B-K energy criterion were used to simulate the interlaminar failure behavior, and the delamination da

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7

Salem, Brahim, Ali Mkaddem, Malek Habak, Yousef Dobah, and Abdessalem Jarraya. "A New Double-Inclination Oblique Model to Simulate Drilling of GFRP/Al-Based Stacks: A Thermomechanical Approach." Polymers 17, no. 8 (2025): 1047. https://doi.org/10.3390/polym17081047.

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This paper reports an investigation of the thermomechanical behavior at the interface of GFRP/Al composite stacks when the stacking arrangement varies. A temperature-coupled damage approach was developed to simulate thermal energy transfer and damage propagation at metallic-to-composite interface. The proposed model was then implemented into ABAQUS/Explicit finite element code using user-defined subroutine VUMAT finely imbricated with VDFLUX. Unlike to previous models, oblique cutting configuration (OCC) involving double-inclination of the tool was proposed to simulate finely the material remo

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8

Bandaru, Aswani Kumar, and Suhail Ahmad. "Effect of Projectile Geometry on the Deformation Behavior of Kevlar Composite Armors Under Ballistic Impact." International Journal of Applied Mechanics 07, no. 03 (2015): 1550039. http://dx.doi.org/10.1142/s1758825115500398.

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A failure model based on the three-dimensional strains in a composite layer with improved progressive damage modeling has been implemented to predict the deformation behavior of composite armors subjected to ballistic impact. The present model comprises mainly of two parts. First, quadratic strain based failure criteria are presented to predict the initiation of failure modes. Second, the post damage softening behavior and degradation of the material stiffness is measured by damage evolution law. The model has been implemented within ABAQUS/Explicit as a user defined subroutine VUMAT. The vali

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9

Al-Azzawi, Ahmad SM, Luiz F. Kawashita, and Carol A. Featherston. "Predicting interlaminar damage behaviour of fibre-metal laminates containing adhesive joints under bending loads." Journal of Reinforced Plastics and Composites 41, no. 5-6 (2021): 167–86. http://dx.doi.org/10.1177/07316844211051706.

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This study includes experimental and numerical investigations on fibre-metal laminate structures containing adhesive joints under static bending loads. Experimental tests were carried out on Glare® 4B specimens manufactured in-house and containing doubler joint features. Numerical analyses were performed using Abaqus software including damage in the glass fibre reinforced polymer layers, ductile damage in the resin pockets (FM94 epoxy) and plasticity in the metal layers. A new cohesive zone model coupling friction and interfacial shear under through-thickness compressive stress has been develo

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10

Wang, Peijie, Chuanchuan Ma, Chun Xue, and Zhibing Chu. "Study on Influence of Mechanical Behavior of AZ31 Magnesium Alloy Based on GTN Damage Modeling." Materials 18, no. 1 (2024): 90. https://doi.org/10.3390/ma18010090.

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Damage mechanisms are a key factor in materials science and are essential for understanding and predicting the behavior of materials under complex loading conditions. In this paper, the influence of different directions, different rates and different model parameters on the mechanical behavior of AZ31 magnesium alloy during the tensile process is investigated based on the secondary development of the VUMAT user subroutine based on the GTN damage model and verified by the tensile experiments at different loading rates and in different directions. The results show that AZ31 magnesium alloy exhib

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11

Chaouki, Hicham, Stéphane Thibodeau, Mario Fafard, Donald Ziegler, and Houshang Alamdari. "Characterization of the Hot Anode Paste Compaction Process: A Computational and Experimental Study." Materials 12, no. 5 (2019): 800. http://dx.doi.org/10.3390/ma12050800.

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The aim of this work is to model and characterize green anode paste compaction behavior. For this purpose, a nonlinear viscoplastic constitutive law for compressible materials, based on the finite strain theory and the thermodynamic framework, was used. An experimental study was carried out to characterize axial and radial behaviors of the anode paste. To this end, simple compaction tests using a thin steel instrumented mold were performed at a temperature of 150 °C. Results of these experiments brought out the nonlinear mechanical behavior of the anode paste. Furthermore, they showed the impo

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12

Zhang, Yanfeng, Zhengong Zhou, and Zhiyong Tan. "Compression Shear Properties of Bonded–Bolted Hybrid Single-Lap Joints of C/C Composites at High Temperature." Applied Sciences 10, no. 3 (2020): 1054. http://dx.doi.org/10.3390/app10031054.

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Based on previous research, in this paper, the compressive shear failure behavior and mechanical properties of bonded–bolted hybrid single-lap joints of C/C composites at high temperature were studied. The compression shear test was performed on the joints at 800 °C to obtain the load–displacement curve and failure morphology. The failure modes of joints were observed by digital microscopy and scanning electron microscopy. A numerical analysis model was implemented in finite element code Abaqus/Explicit embedded with the user material subroutine (VUMAT). The numerical results were compared wit

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13

Yu, Zeliang, Pu Xue, and Yue Chen. "Composite Single-Bolted Joint Simulation for Dynamic Strength Prediction." Proceedings 2, no. 8 (2018): 512. http://dx.doi.org/10.3390/icem18-05424.

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Composite material has been widely used in various fields for its high specific strength and high specific stiffness, so the connectors applicable to composite structures capture many researchers’ attention. With the advantages of higher carrying capacity and repetitive assembling and disassembling, bolted joint becomes one of the most popular connectors in engineering practice. Cutting off the fiber and causing stress concentration are more serious to composite than metal, so it is necessary to predict the strength of the composite joints. Most investigations focus on the response under quasi

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14

Zhuang, Weimin, Jian Sun, and Dongxuan Xie. "Modified Deshpande–Fleck Model considering a Variable Plasticity Poisson’s Ratio and a Variable Ellipticity." Advances in Materials Science and Engineering 2022 (March 16, 2022): 1–14. http://dx.doi.org/10.1155/2022/9235106.

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It is controversial whether the plastic Poisson’s ratio and ellipticity are invariable in the Deshpande–Fleck model, which describes the constitutive behavior of foam materials. In this paper, the Deshpande–Fleck model is modified by a variable plasticity Poisson’s ratio and a variable ellipticity based on a nonassociated flow rule. The plasticity Poisson’s ratio is measured by in situ digital image correlation (DIC) technology during the uniaxial compression experiment of aluminum foam. The ellipticity is then determined through the experimental data of uniaxial compression and hydrostatic co

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15

Li, Xiang, and Ruiying Luo. "Experimental and Numerical Analysis of Progressive Damage of SiCf/SiC Composite under Three-Point Bending." Crystals 12, no. 5 (2022): 720. http://dx.doi.org/10.3390/cryst12050720.

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Satin SiCf/SiC composite has a wide range of applications; it is necessary to study its mechanical properties. The progressive failure of five-harness five-layer satin weave SiCf/SiC plate composites was explored experimentally and numerically in this research. The bending properties were derived and elucidated at ambient temperature through a three-point bending experiment. The generation and progression of damage was observed by CCD camera. For quantitative analysis of the strain field evolution, DIC (digital image correlation) was adopted, while the microscopic analyses were performed for t

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16

Cheng, Hang, Zhiqiang Zhang, Mingwen Ren, and Hongjie Jia. "Experimental and Numerical Simulation Studies on V-Shaped Bending of Aluminum/CFRP Laminates." Materials 16, no. 14 (2023): 4939. http://dx.doi.org/10.3390/ma16144939.

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With the increasing requirements of automotive lightweighting, metal/CFRP laminates are increasingly used. In this paper, Al/CFRP laminates were prepared using an integrated hot press curing method, and the optimum curing conditions were determined using the single-lap shear test at 130 °C for 45 min. The effects of fiber lay-up, forming speed, and metal layer thickness on bending springback were investigated using the V-shaped bending test and Abaqus finite element analysis method. The results show that fiber lay-up has an important influence on springback. Among the five different fiber lay-

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17

Chatti, Sami, and Narjess Chtioui. "Sheet metal forming simulation using finite elastoplasticity with mixed isotropic/kinematic hardening." European Journal of Computational Mechanics, August 7, 2011, 427–53. http://dx.doi.org/10.13052/ejcm.20.427-453.

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A numerical formulation is presented for anisotropic elastoplasticity behavior in finite strain with non-linear isotropic/kinematic hardening model. Non-linear kinematic hardening is modeled by the Lemaitre-Chaboche law with the aim of considering cyclic deformation phenomena. User-defined material subroutines are developed based on Hill’s quadratic yield function for both ABAQUS-Explicit (VUMAT) and ABAQUS-Standard (UMAT). For validation purpose, the tension-compression and cyclic shear tests are simulated. Several sheet forming processes including contact, anisotropic plasticity, elastic mod

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18

Duc-Toan, Nguyen, Banh Tien-Long, Jung Dong-Won, Yang Seung-Han, and Kim Young-Suk. "A Modified Johnson–Cook Model to Predict Stress-strain Curves of Boron Steel Sheets at Elevated and Cooling Temperatures." High Temperature Materials and Processes 31, no. 1 (2012). http://dx.doi.org/10.1515/htmp.2011.127.

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AbstractIn order to predict correctly stress-strain curve for tensile tests at elevated and cooling temperatures, a modification of a Johnson–Cook (J-C) model and a new method to determine (J-C) material parameters are proposed. A MATLAB tool is used to determine material parameters by fitting a curve to follow Ludwick and Voce's hardening law at various elevated temperatures. Those hardening law parameters are then utilized to determine modified (J-C) model material parameters. The modified (J-C) model shows the better prediction compared to the conventional one. An FEM tensile test simulatio

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19

Xue, Lian, Weiping Li, Jialei Liu, and Caijun Xue. "Research on low-velocity impact damage and influencing factors of composite laminates." Journal of Composite Materials, February 7, 2025. https://doi.org/10.1177/00219983251319389.

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To explore the damage behavior of composite laminate panels under low-velocity impact loading, an investigation of the impact performance of composite material plates under low-velocity impact loading was conducted through drop hammer impact tests. A unified theoretical framework regarding intra-layer damage and interlayer delamination in composite laminates was proposed. An enhanced strain-based Hashin criterion was implemented through the Abaqus/Explicit User Material Subroutine (VUMAT) to model intra-layer damage, while a modified traction-separation law, accounting for strain rate effects,

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20

Ahmad, Bilal, and Xiangfan Fang. "Strain rate-dependent crash simulation of woven glass fabric thermoplastic composites." Journal of Reinforced Plastics and Composites, February 17, 2022, 073168442110642. http://dx.doi.org/10.1177/07316844211064235.

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Woven fabric thermoplastic composites possess high specific strength and stiffness along with thermoformability. To utilize the full potential of these materials to achieve better crash-safe designs in automotive structural parts, their crash behavior must be predicted accurately. For reliable crash simulations, strain rate-dependent material data and equally capable material modeling are required. In this study, quasi-static and high-speed tests are carried out to measure tensile and in-plane shear properties. A strain rate-dependent continuum damage mechanics model is formulated to describe

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21

Xuan, Sun, and Tong Mingbo. "Finite Element Analysis of Low-Velocity Impact Damage on Stiffened Composite Panels." July 1, 2014. https://doi.org/10.5281/zenodo.1093920.

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To understand the factors which affect impact damage on composite structures, particularly the effects of impact position and ribs. In this paper, a finite element model (FEM) of low-velocity impact damage on the composite structure was established via the nonlinear finite element method, combined with the user-defined materials subroutine (VUMAT) of the ABAQUS software. The structural elements chosen for the investigation comprised a series of stiffened composite panels, representative of real aircraft structure. By impacting the panels at different positions relative to the ribs, the effect

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