Application of a Lode dependent fracture criterion in predicting fracture of 6061-T6511H aluminium alloy Taylor rods
Qingnian Yang1 Xiaozhen Chen1 Xinke Xiao1 Fan Li2 Wei Zhang3
1. Nanyang Institute of Technology, School of Civil Engineering, Nanyang 473004;
2. Chongqing University, School of Civil Engineering, Chongqing 400045;
3. Harbin Institute of Technology, School of Astronautics, Harbin 150008
To examine the effectiveness the Lode parameter dependent fracture criterion in simulations, Taylor impact tests of 6061-T6511H aluminum alloy cylinders with the diameter of 5.9 mm in the velocity range of 163.4 ~ 327.7 m/s were conducted by a one-stage light gas gun, where two deformation and fracture modes, i.e., mushrooming and shear cracking were identified. Material tests under various stress states and temperatures were conducted in order to characterize the mechanical behavior of 6061-T6511H aluminum alloy. Based on the experimental and corresponding numerical results, a modified Johnson-Cook constitutive relation & Johnson-Cook fracture criterion and a newly developed Lode parameter dependent fracture criterion were calibrated. Then, 3D finite element models were built in ABAQUS/Explicit where the fracture criterion of Lode dependent/independent mentioned above was adopted respectively to simulate the Taylor impacts. Results show that the FE simulations using the Lode parameter dependent fracture criterion can reasonably predict the deformation and fracture behaviors of the Taylor rods of 6061-T6511H aluminum alloy, instead, the material ductility was over predicted by using the Lode parameter independent fracture criterion.
杨庆年1，陈孝珍1，肖新科1，李凡2，张伟3. Lode相关断裂准则在6061-T6511H铝合金Taylor杆断裂预报中的应用[J]. 振动与冲击, 2018, 37(2): 142-149.
Qingnian Yang1 Xiaozhen Chen1 Xinke Xiao1 Fan Li2 Wei Zhang3. Application of a Lode dependent fracture criterion in predicting fracture of 6061-T6511H aluminium alloy Taylor rods. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 142-149.
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