Research on uniaxial tension performance of tailor rolled blank

Uniaxial tension performance of tailor rolled blank(TRB) is studied by means of analytical,simulated and experimental methods,respectively.The analytic model of TRB for uniaxial tension is derived from theory of metal plastic deformation.Uniaxial tension experiments on unannealed and annealed 1.2mm and 2.0mm uniform blanks as well as 1.2 / 2.0mm TRB are carried out,and the difference in the performance of TRB before and after annealing is explained by metallurgical structure.Then,uniaxial tension processes of unannealed and annealed 1.2 / 2.0 mm TRBs are simulated on the basis of uniaxial tension experiments.The experimental results indicate that the stress-strain state of TRB during uniaxial tension can be accurately represented by the analytic model.The necking of unannealed and annealed TRB specimens for uniaxial tension both happens at the thinner sides,and the annealed TRB shows better formability.The conclusions drawn by analytical model,simulation and experiment show good agreement.