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Dynamic pulse buckling of composite shells subjected to external blast

机译：爆炸作用下复合材料壳体的动态脉冲屈曲

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Dynamic pulse buckling of woven E-Glass/Vinyl Ester and laminated E-Glass/Epoxy cylindrical shells subjected to uniform overpressure and asymmetric pressure pulse (side-on explosion) were examined. The solutions for the radial shell deformations were represented by Mathieu differential equations. The dynamic instability of the shells was determined from a Mathieu stability diagram. It was found that the stability of the shells depended on lay-up, aspect ratio as well as impulse distribution. The stable vibration response of the shells with side-on explosion compared well with finite element solutions using a Dynamic, Implicit analysis in ABAQUS Standard. First-ply failure of the woven E-Glass/Vinyl Ester shell with side-on explosion was predicted using a modified Hashin-Rotem failure criterion. It was shown that the thinner woven E-Glass/Vinyl Ester shells were more likely to fail by dynamic instability, whereas the thicker woven E-Glass/Vinyl Ester shells were more likely to fail by first-ply failure.
机译：研究了编织的E-玻璃/乙烯基酯和层压的E-玻璃/环氧树脂圆柱壳的动态脉冲屈曲，它们经受了均匀的超压和不对称的压力脉冲（侧面爆炸）。径向壳变形的解由Mathieu微分方程表示。壳的动态不稳定性是根据Mathieu稳定性图确定的。发现壳的稳定性取决于叠层，纵横比以及脉冲分布。使用ABAQUS标准中的动态，隐式分析，可对侧面爆炸产生的壳体的稳定振动响应与有限元解决方案进行比较。使用改良的Hashin-Rotem破坏准则，可预测发生侧面爆炸的E-玻璃/乙烯基酯编织机壳的第一层破坏。结果表明，较薄的机织E-玻璃/乙烯基酯壳更有可能因动态不稳定性而失效，而较厚的机织E-玻璃/乙烯基酯壳则较容易因第一层失效而失效。

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