超弹性橡胶材料分层圆孔蜂窝防护覆盖层动态压缩行为及性能研究

Dynamic crush behavior and performance of layered honeycomb hyperelastic rubber claddings

针对如何设计具有良好抗冲击性能的舰船湿表面敷设橡胶材料防护覆盖层,以舰艇水下抗冲击防护为背景,借鉴功能梯度材料概念,对四种结构分层圆孔周期蜂窝覆盖层在横向匀速加载下的压缩行为及力学性能进行研究。在利用不同本构模型对材料试验数据进行拟合基础上选择合适模型;分析变形特征、支反力峰值、峰值时间及吸能的压缩行为及力学特性;研究压缩速度、胞元大小、排布对压缩性能影响。研究结果对该类覆盖层动力学特性认识有一定指导作用,同时亦为水下非接触性爆炸下防护覆盖层选用与多目标优化设计提供参考。

Coating rubber claddings onto the wet surface of a ship is widely used and is a very effective way to improve its UNDEX resistance. How to design good claddings becomes a great concern of Navy. Here, based on the background of ship＇s protection and conception of functionally graded materials, the in-plane dynamic crush behavior and mechanical performance of four periodic layered honeycomb claddings were investigated at the lateral constant speed to load. Firstly, three groups of rubber test data were fitted with the models in ABAQUS. Then, a proper model was chosen. Moreover, the influence of compressive velocity and cell size and arrangement was analyzed from four aspects including deformation characteristic, peak reaction force, peak time and energy absorption. The results played an instructive role in understanding the dynamic behavior of claddings and provided a guideline for selecting protective claddings and their further multi-objective optimal design when subjected to UNDEX.