LAN Bin, YE Xian-hui, SONG Shun-cheng, WU Wan-jun, WANG Bi-hao. Formulation and Programming of a Dynamic Constitutive Model at High Strain Rates in ABAQUS for the 304NG Stainless Steel[J]. Applied Mathematics and Mechanics, 2015, 36(2): 167-177. doi: 10.3879/j.issn.1000-0887.2015.02.006
Citation: LAN Bin, YE Xian-hui, SONG Shun-cheng, WU Wan-jun, WANG Bi-hao. Formulation and Programming of a Dynamic Constitutive Model at High Strain Rates in ABAQUS for the 304NG Stainless Steel[J]. Applied Mathematics and Mechanics, 2015, 36(2): 167-177. doi: 10.3879/j.issn.1000-0887.2015.02.006

Formulation and Programming of a Dynamic Constitutive Model at High Strain Rates in ABAQUS for the 304NG Stainless Steel

doi: 10.3879/j.issn.1000-0887.2015.02.006
  • Received Date: 2014-07-23
  • Rev Recd Date: 2014-12-11
  • Publish Date: 2015-02-15
  • The 304NG stainless steel is commonly used in reactor internal structural members. High strain rate dynamic characteristics of this material have important influences on the structural responses under impact loads. However, there is no suitable constitutive model for the high strain rate dynamic behaviors of this material in existing FEM programs as yet. Based on the dynamic tensile tests of the 304NG stainless steel, a new dynamic constitutive model for it was proposed. With the radial return algorithm and the stable dichotomy iteration method, a UMAT subroutine for the ratedependent model was written into ABAQUS, with the implicit stress update algorithm achieved. Then the dynamic FEM analyses of several examples were performed to verify the UMAT subroutine. The results indicate that the proposed dynamic constitutive model is in good agreement with the test data. The UMAT subroutine is helpful to be applied to response analysis of similar structures under impact loads.
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