Evaluation of ductile fracture model in bulk forming

M. Urbánek, J. Džugan, A. Prantl
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Abstract

The purpose of this study is to evaluate the parameters of material plasticity and fracture models at room temperature and at rates up to 1 mm/min for steels which are ordinarily used for forging, for instance the 38MnVS6 steel. The behaviour of materials during forming was evaluated and described using MARC/MENTAT and DEFORM software tools. Several fracture models were examined from the perspective of the planned research tasks which involve testing at forging temperatures up to 1,100°C. The fracture models considered were those which are implemented as standard tools for example: Cockcroft and Latham, Oyane and Rice and Tracey. Standard tensile tests, torsion tests and compressive tests were carried out. Based on the tensile test data, an FEM analysis of the stress-strain curve was conducted. The ductile fracture models were then calibrated using multiple stress-strain conditions, including triaxial stress states and various lode angles.
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大块成形中韧性断裂模型的评价
本研究的目的是评估通常用于锻造的钢(例如38MnVS6钢)在室温和高达1 mm/min的速率下的材料塑性和断裂模型的参数。使用MARC/MENTAT和DEFORM软件工具对材料在成形过程中的行为进行了评估和描述。从计划的研究任务的角度检查了几个断裂模型,这些研究任务涉及在高达1100°C的锻造温度下进行测试。所考虑的断裂模型是作为标准工具实现的,例如:Cockcroft和Latham、Oyane和Rice以及Tracey。进行了标准拉伸试验、扭转试验和压缩试验。基于拉伸试验数据,对应力-应变曲线进行了有限元分析。然后使用多种应力-应变条件,包括三轴应力状态和各种矿脉角,对韧性断裂模型进行校准。
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来源期刊
CiteScore
1.20
自引率
0.00%
发文量
3
期刊介绍: IJCMSSE is a refereed international journal that aims to provide a blend of theoretical and applied study of computational materials science and surface engineering. The scope of IJCMSSE original scientific papers that describe computer methods of modelling, simulation, and prediction for designing materials and structures at all length scales. The Editors-in-Chief of IJCMSSE encourage the submission of fundamental and interdisciplinary contributions on materials science and engineering, surface engineering and computational methods of modelling, simulation, and prediction. Papers published in IJCMSSE involve the solution of current problems, in which it is necessary to apply computational materials science and surface engineering methods for solving relevant engineering problems.
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