用于洛氏硬度压痕建模与分析的自相似性简化方法

Self-Similarity Simplification Approaches for the Modeling and Analysis of Rockwell Hardness Indentation.

作者信息

Ma Li, Zhou Jack, Lau Alan, Low Samuel, deWit Roland

机构信息

National Institute of Standards and Technology, Gaithersburg, MD 20899-8553.

Department of Mechanical Engineering and Mechanics Drexel University, Philadelphia, PA 19104.

出版信息

J Res Natl Inst Stand Technol. 2002 Oct 1;107(5):401-12. doi: 10.6028/jres.107.033. Print 2002 Sep-Oct.

DOI:10.6028/jres.107.033

PMID:27446740

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4861379/

Abstract

The indentation process of pressing a Rockwell diamond indenter into inelastic material has been studied to provide a means for the analysis, simulation and prediction of Rockwell hardness tests. The geometrical characteristics of the spheroconical-shaped Rockwell indenter are discussed and fit to a general function in a self-similar way. The complicated moving boundary problem in Rockwell hardness tests is simplified to an intermediate stationary one for a flat die indenter using principle of similarity and cumulative superposition approach. This method is applied to both strain hardening and strain rate dependent materials. The effects of different material properties and indenter geometries on the indentation depth are discussed.

摘要

对将洛氏金刚石压头压入非弹性材料的压痕过程进行了研究，以提供一种分析、模拟和预测洛氏硬度测试的方法。讨论了球形圆锥形状的洛氏压头的几何特征，并以自相似的方式将其拟合为一个通用函数。利用相似原理和累积叠加法，将洛氏硬度测试中复杂的移动边界问题简化为平模压头的中间固定边界问题。该方法适用于应变硬化和应变率相关材料。讨论了不同材料性能和压头几何形状对压痕深度的影响。