Research on Repeated Loading and Unloading Deformation Behavior of High-strength Steel

Abstract

Abstract. 3D variable cross-section roll forming is a forming method that adopts multi stands gradually roll forming.In the process of plate material forming,deformed region goes through once stand,one phenomenon of elastic-plastic deformation occurs.Through multiple stands,the phenomenon of repeated loading and unloading occurs on plate material.In this paper, the elastic deformation behavior of TRIP590(transformation induced palsticitu steel) after multi elastic-plastic deformation was obtained, and the elastic strain and elasticity modulus of TRIP590 was also obtained by taking one directional tensile test.The above results provide experimental data for the calculation of bending rebound of 3D variable corss-section roll forming.