Determination of pattern allowances for a steel casting using an inverse elastoplastic deformation analysis

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Galles, D.^1 ; Lu, J.^2 ; Beckermann, C.^2

Oak Ridge Ass. Universities, Oak Ridge

TN

37830, United States^1

Department of Mechanical Engineering, University of Iowa, Iowa City

IA

52242, United States^2

关键词: Elasto-plastic analysis;    Elastoplastic deformation;    Forward simulation;    Inverse deformation method;    Inverse simulation;    Pattern geometry;    Production casting;    Trial-and-error process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012077/pdf
DOI  :  10.1088/1757-899X/529/1/012077

来源: IOP

【 摘 要 】

The determination of pattern dimensions using simulation is an inefficient trial-and-error process that requires several design iterations. In this study, the finite element inverse elastoplastic analysis is utilized to calculate the pattern geometry in a single iteration for a plastically deformed body. A simplified casting system is simulated to demonstrate the feasibility of the inverse method. An inverse simulation is performed first to calculate the pattern shape. This configuration is then used as the input geometry for a forward simulation, which is shown to successfully recover the original as-cast shape used for the inverse analysis. Through this sequence, the inverse deformation method is shown to be a viable technique for the determination of pattern allowances in production castings.