Novel method for measuring surface residual stress using flat-ended cylindrical indentation

作     者：Guangzhao HAN Lixun CAI Xiaokun LIU Guangzhao HAN;Lixun CAI;Xiaokun LIU

作者机构：Applied Mechanics and Structure Safety Key Laboratory of Sichuan ProvinceSchool of Mechanics and Aerospace EngineeringSouthwest Jiaotong UniversityChengdu 610031China Zhengzhou Machinery Research Institute Transmission Technology Co.LtdZhengzhou 518115China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2024年第37卷第8期

页      面：486-495页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China(Nos.11872320 and 12072294) 

主　　题：Instrumented indentation Residual stress Finite element simulation Equivalent material method Mechanical property 

摘      要：Instrumented indentation is a promising technique for estimating surface residual stresses and mechanical properties in engineering *** relative difference between the indentation loads for unstressed and stressed specimens was selected as the key parameter for measuring surface residual stresses in flat-ended cylindrical *** on the equivalent material method and finite element simulations,a dimensionless mapping model with six constants was established between the relative load difference,constitutive model parameters,and normalized residual stress.A novel method for measuring the surface residual stress and constitutive model parameters of metallic material through flat-ended cylindrical indentations was proposed using this model and a mechanical properties determination *** simulations were conducted using numerous elastoplastic materials with different residual stresses to verify the proposed model;good agreements were observed between the predicted residual stresses and those previously applied in finite element ***-ended cylindrical indentation tests were performed on four metallic materials using cruciform specimens subjected to various equibiaxial *** results exhibited good conformance between the stress–strain curves obtained using the proposed method and those from traditional tensile tests,and the absolute differences between the predicted residual stresses and applied stresses were within 40 MPa in most cases.