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首页> 外文期刊>SAMPE Journal >Through-Thickness Failure of 3D Fiber Reinforced Foam Core Sandwich Structures
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Through-Thickness Failure of 3D Fiber Reinforced Foam Core Sandwich Structures

机译：3D纤维增强泡沫芯夹芯结构的全厚度破坏

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摘要

Foam core sandwich composites are widely used in primary structural components of launch vehicles and spacecraft. These structures exhibit complex failure modes and are highly sensitive to butt-joints, core mismatches, impact damage, voids, and facesheet delaminations. Three-dimensional Fiber Reinforced Foam Cores (3DFRFC) represent a new class of core material designed for future aerospace structures. An analysis, test, and non-destructive evaluation program was developed to investigate the failure interaction and through-thickness properties of a 3DFRFC composite sandwich structure. 3DFRFC sandwich and unreinforced foam specimens are manufactured and tested in the through-thickness or flatwise tension configuration. The qualities of the manufactured samples are verified using through-transmission ultrasonic inspection. Nonlinear finite element analysis with a progressive failure methodology and the embedded element method is used to understand the failure
机译：泡沫芯三明治复合材料被广泛用于运载火箭和航天器的主要结构部件。这些结构表现出复杂的破坏模式，并且对对接，核心错位，冲击破坏，空隙和面板分层非常敏感。三维纤维增强泡沫芯（3DFRFC）代表了用于未来航空航天结构的新型芯材料。开发了一种分析，测试和无损评估程序，以研究3DFRFC复合夹层结构的失效相互作用和贯穿厚度特性。 3DFRFC三明治和非增强泡沫样品的制造和测试均通过厚度或水平拉伸配置。所制造样品的质量通过透射超声波检查进行验证。使用渐进式故障方法和嵌入式元方法进行非线性有限元分析，以了解故障

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