CAJ | 학술논문

利用LS-Dyna有限元软件开展球形弹弹道侵彻Kevlar/乙烯基树脂三维正交机织复合材料的模拟研究,靶板采用含损伤的正交各向异性本构模型和Hashin失效准则,子弹剩余速度的计算值和实验值符合较好,破坏形貌和实验基本一致,并给出侵彻速度时程曲线;结合x方向纤维和面内基体的损伤演化图,分析弹道侵彻过程和材料的破坏模式.
이용LS-Dyna유한원연건개전구형탄탄도침철Kevlar/을희기수지삼유정교궤직복합재료적모의연구,파판채용함손상적정교각향이성본구모형화Hashin실효준칙,자탄잉여속도적계산치화실험치부합교호,파배형모화실험기본일치,병급출침철속도시정곡선;결합x방향섬유화면내기체적손상연화도,분석탄도침철과정화재료적파배모식.
We present numerical simulation of Kevlar/Vinyl 3D orthogonal woven composite impacted by a spherical bullet with LS-Dyna software. Orthogonal constitutive equation with damage tensor and Hashin failure criteria are adopted for the Kevlar/Vinyl target. Time history of penetration velocity and loading of bullet show that steady penetration process and residual velocity agree well with experimental date. The damage modes basically reflect experimental results. Penetration process and damage modes are studied in details by analyzing damage evolution along the x fiber and interface matrix. It shows that the simulations are in good agreement with experiments.