NUMERICAL SIMULATION OF THE EFFECTS OF MATERIAL PARAMETERS AND HYDROSTATIC PRESSURE ON SUPERPLASTIC BULGING
材料参数及静水压力对超塑性胀形影响的数值模拟

A constitutive relation including the effect of deformation damage has been in-troduced into the rigid-viscoplastic finite element method program,in order to simulatesuperplastic bulging process.The influences of strain rate sensitivity,cavity growth rate andsuperimposed hydrostatic pressure on limit thickness strain have been studied.Theoretically cal-culated results are in agreement with the experimental results for superplastic materials.