CAJ | 학술논문

针对部分金属材料延性断裂、应力三轴度及Lode参数同时相关问题，将两个含Lode参数影响的断裂准则写入有限元程序ABAQUS，用于1．6 mm厚6061－T6铝合金靶板在7．9 mm直径球形弹丸撞击下断裂行为及弹道极限数值预报。为揭示应力状态影响，用两种不考虑Lode参数影响的断裂准则进行有限元计算，并与试验对比。结果表明，引入Lode参数可提升6061－T6铝合金靶板断裂行为及抗侵彻性能的数值预报效果。
침대부분금속재료연성단렬、응력삼축도급Lode삼수동시상관문제，장량개함Lode삼수영향적단렬준칙사입유한원정서ABAQUS，용우1．6 mm후6061－T6려합금파판재7．9 mm직경구형탄환당격하단렬행위급탄도겁한수치예보。위게시응력상태영향，용량충불고필Lode삼수영향적단렬준칙진행유한원계산，병여시험대비。결과표명，인입Lode삼수가제승6061－T6려합금파판단렬행위급항침철성능적수치예보효과。
Recentstudiesshowthattheductilefractureofsomemetalsmaydependonnotonlythestresstriaxiality but also the Lode parameter.Two ductile fracture criteria developed in recent publications incorporating the Lode parameter effect were implemented into ABAQUS procedure and were employed in the numerical prediction of the fracture behavior and ballistic resistance of 1 .6 mm thick 606 1-T6 aluminum alloy targets under impacts of a 7 .9 mm diameter steel ball.To reveal the effect of stress state,FE calculations by using other two fracture criteria without incorporation with the Lode parameter were conducted.These predictions were compared with the test results reported in the open literature. The present comparison study shows that the incorporation of the Lode parameter can improve the prediction results on the fracture behavior and ballistic resistance of 606 1-T6 aluminum alloy targets.