According to uniaxial loading-displacement curves of TC4 titanium alloy, The parameters of Gurson-Tvergaard-Needleman model (GTN model) were determined by an inverse approach. The influence of 6 different GTN model parameters on simulation results were studied by finite element method. It is found that only the parameters of f0 and fN need to be determined by the inverse approach, εn defined by tensile test, Sn determined by calculation, fc and fF could be given by simulation results directly. Voids damage evolution becomes faster with appearing of necking stages of TC4 titanium alloy, until failure fracture.
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王明正,李曉延. TC4鈦合金GTN損傷模型反向標定法研究[J].稀有金屬材料與工程,2012,41(5):795~799.[Wang Mingzheng, Li Xiaoyan. Study on GTN Damage Model of TC4 Titanium Alloy by An Inverse Approach[J]. Rare Metal Materials and Engineering,2012,41(5):795~799.] DOI：[doi]