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首页> 外文会议>International Body Engineering Conference and Exposition >Comparison between experiments and FEM simulation of high velocity tensile test methods to clarify test method's influence of high strength steel
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Comparison between experiments and FEM simulation of high velocity tensile test methods to clarify test method's influence of high strength steel

机译：高速拉伸试验方法的实验与有限元模拟的比较澄清试验方法对高强度钢的影响

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摘要

In order to examine the compatibility of improvement of crashworthiness with weight-saving of automobiles by using high strength steel, a combination analysis of Finite Element Method and Dynamic Mechanical Properties has been established. The material properties used in this analysis have been measured by "one bar method" high velocity tensile tests, which can examine the deformation behaviour of materials at an actual crash speed range (～55km/h). As for the accuracy of this system, comparison between experiments and FEM simulation both of this test machine and other high-velocity-tensile-test machines have clarified the feature of one bar method and the metallurgical features of high velocity deformation. It was confirmed that the stress-strain curve measured by the one bar method agreed with that measured by the modified Split Hopkinson pressure bar method. It was also confirmed by FEM analysis that appropriate stress-strain curve to deform at high strain rate could be identified by using the one bar method because of no influence of the dispersion of stress wave. By FEM simulation of one bar method, the initial peak of the stress-strain curve could be analyzed.
机译：为了通过使用高强度钢来研究通过高强度钢的高强度钢重量储存的持续持续性，建立了有限元方法和动态机械性能的组合分析。该分析中使用的材料特性已经通过“一种条形方法”高速拉伸试验来测量，这可以在实际碰撞速度范围内（〜55km / h）检查材料的变形行为。至于该系统的准确性，实验和有限元模拟之间的比较这两个测试机器和其他高速拉伸试验机的既澄清了一个条形方法的特征和高速变形的冶金特征。确认通过通过改性分裂霍普金森压棒方法测量的一条棒方法测量的应力 - 应变曲线。通过使用一个条形方法可以通过使用应力波的分散的影响，通过使用一种条形方法来识别它以高应变率变形的适当应力 - 应变曲线来证实。通过对一个条形方法的有限元模拟，可以分析应力 - 应变曲线的初始峰。

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