Measuring internal residual stress in Al-Cu alloy forgings by crack compliance method with optimized parameters

作     者：DONG Fei YI You-ping HUANG Shi-quan 董非;易幼平;黄始全

作者机构：Research Institute of Light AlloyCentral South UniversityChangsha 410083China State Key Laboratory of High Performance Complex ManufacturingChangsha 410083China School of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2020年第27卷第11期

页      面：3163-3174页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(51875583)supported by the National Natural Science Foundation of China Project(zzyjkt2018-03)supported by the State Key Laboratory of High Performance Complex Manufacturing,China 

主　　题：residual stress crack compliance method crack range interpolation orders Tikhonov regularization method 

摘      要：Measuring the internal stress of Al alloy forgings accurately is critical for controlling the deformation during the subsequent machine *** this work,the crack compliance method was used to calculate the internal residual stress of Al-Cu high strength alloys,and the effect of various model parameters of crack compliance method on the calculated precision was studied by combining the numerical simulation and experimental *** results show that the precision first increased and then decreased with increasing the crack *** decreased precision when using a high crack range was due to the strain fluctuation during the machining process,and the optimized crack range was 71%of the thickness of *** orders of Legendre polynomial can result in residual stress curve more smooth,while high orders led to the occurrence of *** Tikhonov regularization method effectively suppressed the distortion of residual stress caused by the fluctuation of strain data,which significantly improved the *** addition,The crack compliance method with optimized parameters was used to measure the residual stress of Al-Cu alloy with different quenching *** calculated results demonstrated that the distribution of residual stress was obtained accurately.