采用Gurson模型对材料在拉伸状态下的颈缩、损伤与破坏过程进行分析.应用有限元数值模拟、最优化算法和实验研究相结合,对材料参数进行优化识别.将获得的Gurson损伤参数应用于2169延性金属材料在拉伸状态下的破坏分析.
参考文献
[1] | GURSON A L .Continum theory of ductile rupture by void nucleation and growth:Part Ⅰ-yield criteria and flow rules for porous ductile materials[J].Journal of Engineering Materials and Technology,1977,99(01):2-15. |
[2] | NEEDLEMAN A;TVERGAARD V .Material strain-rate sensitivity in the round tensile bar[R].RI:Brown University,1985. |
[3] | TVERGAARD V .Influence of voids on shear band instabilities under plane strain conditions[J].International Journal of Fracture,1981,17(04):389-406. |
[4] | TVERGAARD V;NEEDLEMAN A .Analysis of the cup-cone fracture in a round tensile bar[J].Acta Metalluraica,1984,32(01):157-169. |
[5] | MARQUARDT D W .An algorithm for least-squares estimation of nonlinear parameters[J].Journal of the society for Industrial and Applied Mathematics,1963,11(02):431-441. |
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