Application of non-associated flow rule for prediction of nonuniform material flow during deep drawing of tailor welded blanks. (March 2023)

• Record Type: Journal Article
• Authors: Bandyopadhyay, Kaushik; Basak, Shamik; Panda, Sushanta Kumar; Saha, Partha; Zhou, Norman
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 237:Number 4(2023)
• Page Start: 618
• Page End: 629
• Publication Date: 2023-03
• Subjects: NAFR -- AFR -- Hill48 -- mixed-hardening law -- FE modelling -- cup height -- thinning; Mechanical engineering -- Periodicals; Engineering -- Management -- Periodicals; Manufacturing processes -- Periodicals; 629.8
• DOI: 10.1177/09544054221110958
• Languages: English
• ISSNs: 0954-4054

Abstract

In order to enhance FE prediction capability, researchers are presently showing interest in applications of non-associated flow rule (NAFR) coupled with Hill48 quadratic function in different sheet metal forming operations. In this work, the concept of NAFR based model was implemented for the first time in FE simulation of deep drawing of DP980-IFHS tailor welded blanks (TWBs) of coated and uncoated sheets. The NAFR model was formulated using two approaches: namely, stress-value based Hill48 as yield function and R-value based Hill48 as the plastic potential function in the first approach, and the vice-versa in the second approach. Also, the classical associated flow rule (AFR) based approach coupled with the anisotropic Hill48 yield model was implemented in the FE simulation for comparison purpose. For improving the prediction accuracy, a mixed hardening equation by combining Voce and Swift hardening law was incorporated as the constitutive equation. It was found that FE simulation implementing the NAFR approach predicted the deep drawing behaviour of the parent materials and TWBs more accurately compared to that of the AFR approach.