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A Three-Dimensional Elastic-Plastic Contact Analysis of Vickers Indenter on a Deep Drawing Quality Steel Sheet

机译:深冲优质钢板维氏压头的三维弹塑性接触分析

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摘要

Three-dimensional finite element-based numerical analysis of Vickers indenter hardness test was conducted to investigate the effect of frictional conditions and material anisotropy on indentation results of deep drawing quality steel sheets. The strain hardening properties and Lankford’s coefficient were determined through the uniaxial tensile tests. The numerical computations were carried out using ABAQUS nonlinear finite element (FE) analysis software. Numerical simulations taken into account anisotropy of material described by Hill (1948) yield a criterion. The stress and strain distributions and loading–unloading characteristics were considered to study the response of the material. It was found that the hardness values seemed to be influenced by the value of the friction coefficient due to the pile-up phenomenon observed. The increasing of the friction coefficient led to a decrease of the pile-up value. Moreover, the width of the pile-ups differed from each other in the two perpendicular directions of measurement. Frictional conditions did not significantly affect the maximum force and the character of load–displacement curves. Frictional regime between the indenter and workpiece caused that the region of maximum residual stresses to be located in the subsurface.
机译:基于维氏压头硬度试验的三维有限元数值分析,研究了摩擦条件和材料各向异性对深冲优质钢板压痕结果的影响。应变硬化性能和兰克福德系数是通过单轴拉伸试验确定的。使用ABAQUS非线性有限元(FE)分析软件进行了数值计算。希尔(1948)描述的考虑材料各向异性的数值模拟产生了一个标准。考虑应力和应变分布以及装卸特性来研究材料的响应。发现由于观察到的堆积现象,硬度值似乎受到摩擦系数值的影响。摩擦系数的增加导致堆积值的减小。此外,堆积物的宽度在两个垂直的测量方向上彼此不同。摩擦条件并没有显着影响最大力和载荷-位移曲线的特性。压头和工件之间的摩擦状态导致最大残余应力区域位于地下。

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