摘要
为研究超高分子量聚乙烯板在爆炸冲击波和破片侵彻联合载荷作用下的破坏及响应,采用LS-DYNA数值仿真的方法来模拟爆炸产生的冲击波及破片群作用到靶板上的过程,通过改变爆炸距离、载荷形式和靶板厚度等因素,得到在不同条件下靶板变形破坏的结果.其模拟的结果表明:相比于冲击波或破片群的单一载荷作用,联合载荷作用对靶板的破坏能力更强;在联合作用下,随着爆距的增加,靶板的整体弯曲变形和破坏程度减小,靶板的破坏模式由开始的集团冲塞破口转为穿孔破口和撕裂破口共同存在,直至只存在穿孔破口;在联合作用下,随着靶板厚度的增加,破片群穿透靶板的剩余速度逐渐减小,速度衰减率增大,靶板抵御破片侵彻的能力提高,但仅改变靶板厚度对整体变形及破坏模式的影响并不明显.
In order to study the damage and response of UHMWPE plates under the combined impact of explosion shock waves and fragment penetrations,the LS-DYNA numerical simulation method is used to simulate the shock wave generated by the explosion and the process of the action of fragments on the target plate.By changing the factors such as the explosion distance,the load form and the thickness of the target plate,the deformation and damage of the target plate under different conditions are obtained.The results of simulations show that the combined action of shock waves and fragments is more serious than the impact of shock waves or fragments alone on the target;under the combined action,as the explosion distance increases,the overall bending deformation and damage of the target plate is reduced,the failure mode of the target plate is changed from a large break at the beginning of the symmetry center to a penetration and tear break,until finally it turns into only penetrating break;under the combined action,as the thickness of the target increases,the residual velocity of the fragments gradually decreases,the rate of decay of the fragments increases,and the ability of the target plate to resist the penetration of the fragments increases.Only changing the thickness of the target plate has no obvious effect on the overall deformation and failure mode.
作者
邱晓清
唐柏鉴
任鹏
张晓锋
QIU Xiaoqing;TANG Baijian;REN Peng;ZHANG Xiaofeng(School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212003, China;Civil Engineering College, Suzhou University of Science and Technology, Suzhou 215009, China;School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China)
出处
《江苏科技大学学报（自然科学版）》
CAS
2020年第3期6-13,共8页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
国家自然科学基金资助项目(51509115)。
