Results 141 to 150 of about 1,171 (167)

Prediction of damage evolution behavior in ductile metals by Lemaitre criterion and comparison with GTN and EGTN damage models

Mechanics Based Design of Structures and Machines, 2021
Prediction of damage evolution in ductile metals is among the most important challenges ahead of researchers.
M. S. Sadeghi Nezhad, F. Haji Aboutalebi
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FEA Simulation of Clinching Process Based on GTN Damage Model

Advanced Materials Research, 2013
In this work, the Gurson-Tvergaard-Needleman (GTN) damage model is adopted to depict the material damage during the clinch joining process in a simulation-based theoretical model. The parameters of the GTN model which influence the void nucleation, growth and coalescence are identified.
Bai Jun Shi, Shu Hui Liao, Song Peng, Hang Li   +3 more
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Numerical simulation of incremental sheet forming based on GTN damage model

The International Journal of Advanced Manufacturing Technology, 2015
An attempt was made to analyze the damage evolution and ductile fracture of incremental forming at the microscopic level. Firstly, an extended Gurson–Tvergaard–Needleman (GTN) model integrating with Hill’48 anisotropic yield criterion was established and numerically implemented by User-defined Material Subroutine (VUMAT) in the commercial finite ...
Junchao Li, Songpu Li, Zhiyuan Xie, Wei Wang   +3 more
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Implementation of a Shear Modified GTN Damage Model and its Application in Cold Rolling

Advanced Materials Research, 2013
To characterize the degradation of material at low triaxiality, the shear modified GTN damage model proposed by Nahshon and Hutchinson (2008) was introduced in this study. The details of the numericalimplementation and validation of the model was conducted.
Quan Sun, Yu Xi Yan, Jian Jun Chen, Xiao Xue Li, Hong Liang Pan   +4 more
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Ductile fracture prediction of additive manufactured Ti6Al4V alloy based on an extended GTN damage model

Engineering Fracture Mechanics, 2021
Abstract Selective Laser Melting (SLM) is one of the revolutionary additive manufacturing (AM) technologies to produce metallic mechanical parts. To thoroughly understand the damage and fracture behavior of SLM-fabricated Ti6Al4V alloy under complex stress states, a number of tensile, compressive and torsional experiments covering various stress ...
Xuan Yang, Yazhi Li, Wei Jiang, Min-ge Duan, Dong Chen, Biao Li   +5 more
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A Mesh Independent GTN Damage Model and Its Application in Simulation of Ductile Fracture Behaviour

Volume 3: Design and Analysis, 2008
Ductile fracture process involves the typical stages of nucleation, growth and coalescence of voids in the micro-scale. In order to take the effects of these voids on the stress carrying capability of a mechanical continuum during simulation, damage mechanics models, such as those of Rousselier and Gurson-Tvergaard-Needleman (GTN) are widely used ...
M. K. Samal, M. Seidenfuss, E. Roos, B. K. Dutta, H. S. Kushwaha   +4 more
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Failure analysis of AZ31 magnesium alloy sheets based on the extended GTN damage model

International Journal of Minerals, Metallurgy, and Materials, 2013
Based on the Gurson-Tvergaard-Needleman (GTN) model and Hill’s quadratic anisotropic yield criterion, a combined experimental-numerical study on fracture initiation in the process of thermal stamping of Mg alloy AZ31 sheets was carried out. The aim is to predict the formability of thermal stamping of the Mg alloy sheets at different temperatures.
Rui-ze Wang, Zhang-hua Chen, Yu-jie Li, Chao-fang Dong   +3 more
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DUCTILE DAMAGE ANALYSIS BASED ON A J₃-GTN-LIKE MODEL

Journal of Multiscale Modelling, 2011
A GTN-like model which yield function explicitly depends upon the third stress invariant is first described in this paper. Subsequently, a fully implicit stress integration procedure of this constitutive model based on the return-mapping algorithm is developed.
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Identification of GTN Damage Parameters as a Surrogate Model for S355

Proceedings of the 17th International Symposium on Tubular Structures(ISTS17), 2019
Rui Yan, Haohui Xin, Milan Veljkovic
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Optimization of Damage Parameters of the GTN Model for PVC

2017
Khellafi, Habib, B. Ould Chikh, H. M. Meddah, Bendouba Mostefa   +3 more
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