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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >A non-associated anisotropic plasticity model with mixed isotropic-kinematic hardening for finite element simulation of incremental sheet metal forming process
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A non-associated anisotropic plasticity model with mixed isotropic-kinematic hardening for finite element simulation of incremental sheet metal forming process

机译：具有混合各向同性 - 运动硬化的无相关各向异性塑性模型，用于增量板材成形过程的有限元模拟

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摘要

This paper focuses on numerical simulation of single point incremental forming (SPIF) process. Via a user-defined material (VUMAT) subroutine is employed to implement a non-associated mixed isotropic-kinematic hardening material model. The accuracy of the proposed non-associated flow rule model to predict the material behavior and the anisotropy in sheet metal forming simulations is examined by comparing numerical results with experimental measurements. The suggested model shows good agreement with experimental results compared to the associated Hill_R and Hill_S models. The proposed non-associated flow rule demonstrates a good efficiency to simulate the springback after sheet metal forming and to predict the thickness variation during incremental sheet metal forming process. The present non-associated model can improve the prediction of both anisotropic and hardening behaviors of material used in numerically controlled sheet metal forming technology.
机译：本文重点介绍单点增量成型（SPIF）过程的数值模拟。 通过用户定义的材料（Vumat）子程序用于实现非相关的混合各向同性 - 运动淬火材料模型。 通过将数值结果与实验测量比较，检查所提出的无相关流量规则模型的准确性以预测材料行为和钣金形成模拟中的各向异性。 与相关的Hill_R和Hill_S模型相比，建议的模型与实验结果表现出良好的一致性。 所提出的非相关性流量规则表明了在金属板形成后模拟回弹的良好效率，并预测增量金属板形成过程中的厚度变化。 本发明的非相关模型可以改善在数值控制的金属板形成技术中使用的材料的各向异性和硬化行为的预测。

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