微爆索线性切割航空有机玻璃的实验研究和有限元分析

为了提高航空人/椅救生系统穿盖的成功率和降低飞机复杂性，提出了微爆索（MDC）线性切割技术在穿盖弹射系统中的应用。设计了一系列不同类型的微爆索，对航空有机玻璃（PMMA）平板元件的切割过程进行了实验研究，确定了微爆索的金属药型罩材质、炸药类型和装药线密度范围。观测了层裂现象，得到了切割深度与装药量的关系。采用非线性动态分析程序LS-DYNA对切割过程进行了数值模拟,观察到了层裂现象。数值模拟得到的PMMA的切割深度与装药线密度的关系，与实测得到的结果基本吻合。

Experimental study and finite element analysis of linear cutting aerial PMMA using micro detonation cord

Application of linear cutting technique with micro detonation cord( MDC) in penetration ejection system was proposed to improve successful probability of aerial aviator/seat escape system and to reduce aeroplane complexity. Different kinds of MDC were designed. Cutting process of polymethyl methacrylate (PMMA) plate by MDC was experimentally studied to determine metal cover material, explosive types, charge quantities. Spallation phenomena were observed, and relationship between the cutting depth and charge quantities was obtained. Process of cutting PMMA plate was simulated using nonlinear dynamic analysis code LS-DYNA to compare with the experiment. Relationship of cutting depth of PMMA plate and charge linear density obtained by numerical simulation is in good agreement with the experimental results.