In recent years, one of the most significant advances in analysis and simulation of metal forming processes has been the development and application of the finite element method (FEM). Hydroforming microscale sheet metal forming represents a new and attractive solution to many manufacturing problems. In this paper, an effort was made to determine material properties such as the strain hardening index (n) and the strength coefficient (K) through hydroforming simulations using LS DYNA software which was represented as FEM and also by regression analysis which was called Analytical method. Hydroforming simulation is a cost effective method to evaluate material properties which are unknown. The adoption of hydroforming represents a significant contribution to manufacturing research and development in the automobile and airline industries. The present paper describes the development of two simple methods for determining material properties from previous sheet bulge hydroforming experiments on the microscale. These methods were able to approximate k and n values from sheet bulge hydroforming experiments for 11 mm, 5 mm, and 1 mm diameter dies where proposed methods were presented and results from finite element models and regression analysis were compared with established material properties.
|Commitee:||Misra, Devesh, Taylor, Charles|
|School:||University of Louisiana at Lafayette|
|School Location:||United States -- Louisiana|
|Source:||MAI 53/01M(E), Masters Abstracts International|
|Keywords:||Bulge test, FEA, Hydroforming, LS DYNA, Material properties, Sheet metal forming|
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