In this work, a free piston shock tube is utilized to conduct blast experiments on unidirectional glass fiber reinforced thermoplastic composite-metal hybrid panels. Damage and deflection characteristics are obtained in real time during the blast test using fringe projection methods, and post blast damage is assessed by nondestructive evaluation methods. Finite element models are developed in LS Dyna for the blast apparatus and hybrid composite panel and the results are compared to the experimental blast tests. The delamination in the computational model matched both size and shape to the delamination of the composite C-Scan. Furthermore, both dynamic deflection and permanent deflection of the hybrid panel correlated well between the experimental blast test and the LS Dyna blast simulation.

中文翻译：

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高压爆炸载荷下复合金属混合板损伤机制的实验和计算研究

在这项工作中，利用自由活塞激波管对单向玻璃纤维增​​强热塑性复合金属混合面板进行爆炸实验。使用条纹投影方法在爆炸试验过程中实时获得损伤和偏转特征，并通过无损评估方法评估爆炸后损伤。在 LS Dyna 中为爆炸装置和混合复合板开发了有限元模型，并将结果与​​实验爆炸测试进行了比较。计算模型中的分层的尺寸和形状与复合 C 扫描的分层相匹配。此外，混合面板的动态偏转和永久偏转在实验爆炸测试和 LS Dyna 爆炸模拟之间具有良好的相关性。