Improved Implementation of Material Behaviour Change due to Bake Hardening in the Simulation of the Process Chain

IF 0.3 Q4 THERMODYNAMICS
M. Hofmann, A. Oeckerath, T. Wallmersperger, K. Wolf
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引用次数: 0

Abstract

Abstract The steadily increasing demands on the crash safety of automobiles with simultaneous weight reduction also mean higher requirements for crash simulation. In addition to manufacturability, the focus in component dimensioning is increasingly on crash properties. In order to improve the predictive accuracy of crash simulation, the individual process steps must be coupled in the simulations. To increase the quality of the predictions, thermal treatments such as curing of the paint, which normally takes place at 170 °C for around 20 minutes, should also be taken into account. In many steels, the so-called bake-hardening effect occurs. This leads to an increase in the yield stress. In this publication, different transformation approaches for the hardening curves will be investigated in order to increase the prediction accuracy in the process chain. An example is used to demonstrate their easy applicability in the simulation of the process chain.
工艺链模拟中由于烘烤硬化导致的材料行为改变的改进实现
在汽车轻量化的同时,对汽车碰撞安全性的要求不断提高,对碰撞仿真也提出了更高的要求。除了可制造性外,部件尺寸的重点也越来越多地放在碰撞性能上。为了提高碰撞仿真的预测精度,必须在仿真中对各个过程步骤进行耦合。为了提高预测的质量,还应考虑到热处理,例如通常在170°C下进行约20分钟的油漆固化。在许多钢中,会发生所谓的烘烤硬化效应。这导致屈服应力的增加。为了提高工艺链中的预测精度,本文将研究硬化曲线的不同变换方法。通过实例说明了它们在流程链仿真中的适用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
43
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