Abstract: A unified damage and fracture model, the combinatory work density model, which is suitable for both non-cracked body and cracked body has been su-ggested5-7 by the authors of this paperIn the present paper, the deformation and fracture of the two kinds of tensile specimen and TPB specimen made of Steel 40Cr have been simulated by using the new model combined with large elastic-plastic deformation finite element method. The results represent the whole deformation and fracture processes of the specimens in ...