Simulation of the influence of Lode parameter on ductile fracture using an ellipsoidal void model
Simulation of the influence of Lode parameter on ductile fracture using an ellipsoidal void model
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DOI：
10.1016/j.ijsolstr.2021.111143
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发表时间：
2021-10
影响因子：
3.6
通讯作者：
Kazutake Komori
中科院分区：
文献类型：
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作者：
Kazutake Komori
采用作者提出的椭球孔洞模型模拟了矿脉参数μ对韧性断裂的影响，并利用本文提出的基本理论进行了分析。在μ=+1和μ=-1的情况下，用椭球孔洞模型计算的断裂等效应变几乎相同。在μ=±1的情况下，用椭球孔洞模型计算的断裂等效应变比μ= 0的情况下的断裂等效应变大。用椭球体模型计算的孔洞形状和断裂处的孔洞结构与应力三轴度有很大关系，但与矿脉参数关系不大。所提出的基本理论表明，μ=±1时的断裂等效应变是μ= 0时的2/3。用基本理论分析的等效断裂应变与用椭球孔洞模型计算的结果基本一致。
The influence of the Lode parameter μ on ductile fracture is simulated using an ellipsoidal void model proposed previously by the author, and is analyzed using an elementary theory proposed in this study. The equivalent strain at fracture calculated using the ellipsoidal void model in the case of μ=+ 1 is almost identical to that in the case of μ=-1. The equivalent strain at fracture calculated using the ellipsoidal void model in the case of μ=±1 is larger than that in the case of μ= 0. The void shape and the void configuration at fracture calculated using the ellipsoidal void model significantly depend on the stress triaxiality but scarcely depend on the Lode parameter. The proposed elementary theory indicates that the equivalent strain at fracture in the case of μ=±1 is 2/3 times larger than that in the case of μ= 0. The equivalent strain at fracture analyzed using the elementary theory almost agrees with that calculated using the ellipsoidal void model.