Inverse identification of material parameters of titanium alloy TB5 based on response surface methodology and quasi-Newton method

摘要

The anisotropic behavior of titanium alloy sheet TB5 cannot be accurately obtained by experimental identification of standard sheet uniaxile tensile tests. This paper describes a powerful technique allows for the identification of Hill'48 anisotropic parameters by inverse technique method based on the response surface methodology and quasi-Newton method. The identification approach takes the cylinder drawing as study object, and anisotropic parameters as optimum parameters. And the anisotropic parameters, which gained directly from experimental orthogonal test and uniform design tests, are tuned in the finite element model, that the numerically computed height and thickness of the cup matches the experimentally measured field as closely as possible. The result shows that the anisotropic parameters from the inverse identification can describe the mechanical behavior well.