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Research on Forming Limit Stress Diagram of Advanced High Strength Dual-Phase Steel Sheets
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Research on Forming Limit Stress Diagram of Advanced High Strength Dual-Phase Steel Sheets
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Journal Article
Research on Forming Limit Stress Diagram of Advanced High Strength Dual-Phase Steel Sheets
2023
Overview
The Forming Limit Stress Diagram (FLSD) can accurately describe the forming process of high-strength steel. However, obtaining FLSD is relatively difficult. In order to predict fracture in advanced high-strength dual-phase (DP) steels, limit maximum and limit minimum principal strains of sheet were obtained through multiple sets of test and simulation. Two material parameters, strength coefficient K and hardening exponent n are introduced into the FLSD function which is established by the strain-stress transformation function. The function shows that the k-value determines the value of the maximum principal stress, while the n-value affects the curvature of the curve. Verification of correctness by testing and simulation to within 10% accuracy. This paper explores a new approach to FLSD research based on material properties, which can expand the application scope of FLSD.
Publisher
MDPI AG,MDPI
