Finite Element Simulation of Residual Stress Determination Based on Spherical Indentation Accumulation Morphology

Xiaochen He,Jingyi Shao,Jianhao Feng

doi:10.4236/wjm.2021.116009

Abstract

The introduction of residual stress during the processing of materials has an important impact on the properties of the materials, so it is important to accurately measure the residual stress of the material. This paper established a finite element model of spherical indentation under the action of non-equivalent biaxial residual stress. Then we extracted the full-field accumulation state near the indentation under different stress states from the simulation results and summarized the pile height distribution near the indentation under different stress states. From the simulation, we found that the maximum pile-up height near the indentation point presented a regular trend.

Highlights

The safety and reliability of major national infrastructure and public facilities, such as aircraft, high-speed rail, ships, and nuclear power plants, are the focus of society, and affect the country’s economic development
We found that the maximum pile-up height near the indentation point presented a regular trend
For the direction of the compressive stress, the slope of the pile-up morphology is larger, which indicates that the stacking phenomenon is more obvious, while for the direction of tensile force, the slope of the pile-up morphology is relatively small, indicating that the amount of pile-up there is small

Summary

Introduction

The safety and reliability of major national infrastructure and public facilities, such as aircraft, high-speed rail, ships, and nuclear power plants, are the focus of society, and affect the country’s economic development. Residual stress will be introduced into metal materials in the process of manufacture, processing, and surface treatment in different degrees [1] [2]. These introduced residual stresses have an important influence on the performance. It is of great significance to measure the residual stress of engineering materials accurately

Objectives

Results

Conclusion