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深冲优质钢板上维氏压头的三维弹塑性接触分析

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

作者信息

Trzepiecinski Tomasz, Lemu Hirpa G

机构信息

Department of Materials Forming and Processing, Rzeszow University of Technology, al. Powst. Warszawy 8, 35-959 Rzeszów, Poland.

Faculty of Science and Technology, University of Stavanger; N-4036 Stavanger, Norway.

出版信息

Materials (Basel). 2019 Jul 4;12(13):2153. doi: 10.3390/ma12132153.

DOI:10.3390/ma12132153
PMID:31277427
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6651008/
Abstract

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.

摘要

为了研究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，对维氏压头硬度试验进行了基于三维有限元的数值分析。通过单轴拉伸试验确定了应变硬化性能和兰克福德系数。使用ABAQUS非线性有限元（FE）分析软件进行了数值计算。考虑了由希尔（1948）描述的材料各向异性的数值模拟得出了一个准则。研究了应力和应变分布以及加载-卸载特性，以研究材料的响应。结果发现，由于观察到的堆积现象，硬度值似乎受摩擦系数值的影响。摩擦系数的增加导致堆积值的降低。此外，在两个相互垂直的测量方向上，堆积的宽度彼此不同。摩擦条件对最大力和载荷-位移曲线的特征没有显著影响。压头与工件之间的摩擦状态导致最大残余应力区域位于次表面。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e597/6651008/a0baf8e6d36d/materials-12-02153-g014.jpg
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