CAJ | 학술논문

基于Johnson-cook材料屈服模型描述材料本构关系，引入材料失效参数与单元删除技术，运用ABAQUS建立穿甲弹侵彻目标靶板的三维数值模型，研究探讨穿甲弹对靶板结构的毁伤机理及弹体碰撞冲击作用下靶板结构的损伤模式和动响应特性。分析结果表明：单元失效删除技术适用于处理侵彻冲击等大变形问题，穿甲弹侵彻靶板是典型的冲塞破坏，数值模拟的弹体剩余速度与参考文献结果吻合较好，充分验证了文中所建立的数值模型在预测侵彻过程中的动力响应及损伤的合理准确性。该研究方法与结论可为进一步研究物体碰撞时的侵彻和材料失效问题提供依据，也为穿甲弹结构优化设计及舰船结构装甲防护设计提供参考。
기우Johnson-cook재료굴복모형묘술재료본구관계，인입재료실효삼수여단원산제기술，운용ABAQUS건립천갑탄침철목표파판적삼유수치모형，연구탐토천갑탄대파판결구적훼상궤리급탄체팽당충격작용하파판결구적손상모식화동향응특성。분석결과표명：단원실효산제기술괄용우처리침철충격등대변형문제，천갑탄침철파판시전형적충새파배，수치모의적탄체잉여속도여삼고문헌결과문합교호，충분험증료문중소건립적수치모형재예측침철과정중적동력향응급손상적합리준학성。해연구방법여결론가위진일보연구물체팽당시적침철화재료실효문제제공의거，야위천갑탄결구우화설계급함선결구장갑방호설계제공삼고。
Based on the constitutive relation of the materials described by Johnson-cook yield model, this paper establishes a three-dimensional numerical model of the armor-piercing bullet penetrating target plate by ABAQUS with consideration of the material failure parameter and element deletion technology. It also studies and discusses the mechanics of the armor-piercing bullet damaging structure of the target plate and its damage mode and the dynamic response characteristics under the collision impact of the bullet. The analysis results show that the large deformation problem can be simulated by the element failure deletion technology, and armor-piercing bullet penetrating target plate is typical plugging destroy. It also ifnds out that the projectile residual velocity predicted by numerical simulation is in good agreement with the results from references, which strongly veriifes accuracy and reasonability of the proposed numerical model in predicting the dynamic response and damage during the penetration. The research method and conclusion can provide a basis for penetration and material failure problems in a collision, also provide references for the optimization design of armor-piercing bullet and protective design of the armored structure for warships.