Experimental and numerical investigation of springback effect for advanced high strength dual phase steel

Material parameter identification within an integrated methodology considering anisotropy, hardening and rupture

“…It has been proved that the reliability of the numerical prediction of springback increases due to the consideration of the Bauschinger effect (Chung et al, 2005). Recently, Chongthairungruang et al (2012) investigated the influence of pre-deformation on the springback of high strength steel sheets. A modified S-rail forming test was used to evaluate the degree of springback of the steel sheets after a pre-strain.…”

Springback prediction and reduction in deep drawing under influence of unloading modulus degradation

“…Nevertheless, this non-linear behavior of unloading and reloading curves could be neglected. Chongthairungruang et al [12] observed from the unloading-reloading curves that the total strain recovery during unloading stage decreases when plastic strain becomes higher and finally reaches a saturation value. It is however observed that there can be up to 22 % reduction in the initial Young's modulus with increasing plastic strains for HSS [6].…”

Effect of Cold Drawing Pass Schedule on Mechanical Properties and Microstructure of ST 52 during Cold Drawing of Seamless Tubes and its Influence on Springback

“…At the same time it is more realistic because the contact forces are present during the unloading step [9, 10, 11,12 and 13].The work reported that the major improvements in the critical properties of a double corrode panel can be achieved using variable blank holder process. Springback was significantly reduced and dent resistance increased [14].Retained austenite exits in many hardenable steels and its presence induced both positive changes in mechanical engineering properties [15].Mathematical expression describing the relation of Young's Modulus with plastic strain was proposed and this expressions was implemented into LS-DYNA for simulation of U-Channel springback [16].The variation of Young's Modulus during loading and unloading was considered to identify different variables affecting ratcheting simulation [17].The work reveals the influence of pre deformation on the springback of steel AHSS sheets under consideration of the Young's Modulus change and the effect of this change as a function of plastic strength [18].An elasto-plastic model using a kinematic hardening model was made for springback analysis in sheet metal forming. The change of Young's Modulus versus plastic strain was proposed by [19].…”