夹芯复合材料圆柱壳在静水压力下的承载能力试验

An experiment study on capacity of composite sandwich cylindrical shell under hydrostatic pressure

为研究极限复合材料圆柱壳在静水压力下的损伤现象和机理,首先基于钢制耐压壳比重大以及声学和磁学性能差的缺点,提出了使用夹芯复合材料圆柱壳作为潜水器耐压壳的新型结构形式;然后,采用试验研究,比较了两种模量芯材的夹芯复合材料圆柱壳结构在静水压力下的承载能力;最后,根据两种壳体的特点,设计了两种不同的试验方案进行试验,得到了壳体的失效载荷,并通过应变片测定了壳体复合材料表层上相应测点在试验过程中的应变数据。得到以下结果:HW-S01壳体受到屈曲效应的破坏,而HW-055壳体由于局部复合材料应力过载而失效;HW-S01壳体的试验失效荷载为1.34MPa,HW-055壳体的失效载荷为11.2MPa。试验结果表明:该夹芯复合材料圆柱壳有能力承受超过1000m水深的静水压力,可以对大潜深潜水器全复合材料耐压壳的设计研究提供参考。

Traditional steel pressure shell applied in submersibles has such defects as the high density of steel which affects the volume of the vessel,and the poor acoustical and magnetic performance of steel structure.In order to avoid these defects,composite sandwich cylindrical shell is introduced in this paper to replace steel pressure shell.The composite sandwich cylindrical shell structure is studied using experiment method to compare the capacity of two shell models under hydrostatic pressure.Two experiments of these shells are carried out to get experiment failure loads and strain data measure points on the shell′s outer and inner surface.As a result,the HW-S01 Shell is damaged by buckling effect,and the failure load is 1.34 MPa in the experiment.The HW-055 Shell fails because of local composite matrix compressive stress overload,and the structure fails at a load of 11.2 MPa in experiment.The experiment results show that the composite sandwich cylindrical shell is capable of bearing the hydrostatic pressure under a depth of 1 000 meters in water,and thus it can support the designing and research of full composite pressure shell for deep-sea submarine.