A unifying approach in simulating the shot peening process using a 3D random representative volume finite element model

作     者：Dianyin HU Ye GAO Fanchao MENG Jun SONG Yanfei WANG Mengxi REN Rongqiao WANG 

作者机构：School of Energy and Power Engineering Beihang University Beijing 100083 China Collaborative Innovation Center of Advanced Aero-Engine Beijing 100083 China Beijing Key Laboratory of Aero-Engine Structure and Strength Beijing 100083 China Mining and Materials Engineering McGill University Montreal QC H3A 0C5 Canada Experimental School of Beihang University Beijing 100083 China School of Automation Science and Electrical Engineering Beihang University Beijing 100083 China 

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

年 卷 期：2017年第30卷第4期

页      面：1592-1602页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 08[工学] 0706[理学-大气科学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the financial support from China Scholarship Council (CSC) (No. 201406025083) National Natural Science Foundation of China (NSFC) (Nos. 51305012 and 51675024) Aviation Science Fund of China (No. 2014ZB51) financial support from NSFC (No. 51375031) financial support from NSFC (No. 51628101) National Sciences and Engineering Research Council (NSERC) Discovery grant (No. RGPIN 418469-2012) 

主　　题：Almen intensity Boundary effect Finite element modeling Residual stress Shot peening 

摘      要：Using a modified 3D random representative volume（RV）finite element model,the effects of model dimensions（impact region and interval between impact and representative regions）,model shapes（rectangular,square,and circular）,and peening-induced thermal softening on resultant critical quantities（residual stress,Almen intensity,coverage,and arc height）after shot peening are systematically examined.A new quantity,i.e.,the interval between impact and representative regions,is introduced and its optimal value is first determined to eliminate any boundary effect on shot peening ***,model dimensions are respectively assessed for all model shapes to reflect the actual shot peening process,based on which shape-independent critical shot peening quantities are ***,it is found that thermal softening of the target material due to shot peening leads to variances of the surface residual stress and arc height,demonstrating the necessity of considering the thermal effect in a constitutive material model of shot *** study clarifies some of the finite element modeling aspects and lays the ground for accurate modeling of the SP process.