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首页> 外文期刊>Journal of Spacecraft and Rockets >Through-Thickness Connection of Matrix Cracks in Laminate Composites for Propellant Tank
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Through-Thickness Connection of Matrix Cracks in Laminate Composites for Propellant Tank

机译：推进剂罐层合复合材料基体裂纹的全厚度连接

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摘要

Matrix crack accumulation in multiple plies of composite laminates is experimentally investigated to assess the through-thickness connection of matrix cracks, which is closely related to propellant leakage problems of composite tanks. Cracking patterns in [0/θ_2/90]_s laminates reveal that layup angles have a significant effect on crack induction mechanisms in contiguous plies. Matrix crack propagation behaviors in the fiber direction of θ ply induced by 90-ply cracks are investigated in terms of energy release rates using parametric-oriented finite element analysis based on an oblique coordinate system. The effect of cryogenic conditions on crack induction in contiguous plies is also studied, and discussions on through-thickness connection of matrix cracks in composite laminates are provided.
机译：通过实验研究了复合层压板多层中的基体裂纹积累，以评估基体裂纹的全厚度连接，这与复合材料储罐的推进剂泄漏问题密切相关。 [0 /θ_2/ 90] _s层压板的裂纹模式表明，铺层角对连续层的裂纹诱导机理有重要影响。使用基于斜坐标系的参数定向有限元分析，根据能量释放率，研究了90层裂纹在θ层纤维方向上的基体裂纹扩展行为。还研究了低温条件对连续层板裂纹诱导的影响，并讨论了复合材料层合板中基体裂纹的全厚度连接。

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