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首页> 外文会议>構造強度に関する講演会 >Fracture Mechanical Study on Initiation and Growth of Debonding between Liner and FW Layer of Cryogenic Composite Material Tank for Rocket System.
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Fracture Mechanical Study on Initiation and Growth of Debonding between Liner and FW Layer of Cryogenic Composite Material Tank for Rocket System.

机译：火箭系统低温复合材料罐衬里和FW层粘晶剥离的折断力学研究。

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A CFRP cryogenic tank is being developed for the future space vehicle to reduce the weight of a fuel tank. In the present study, damage problems of the CFRP tank with the Aluminum alloy liner is discussed through a finite element analysis, which is subjected to not only the internal pressure but also the high thermal stresses. The interfacial stress distribution around the portions with the thickness change of liner in the cylindrical portion of the tank is particularly studied since the broad debonded portion between the CFRP layer and the Aluminum liner was observed during the low temperature and pressure test. The magnitude of the interface stress obtained is found to be sufficiently large to cause a debonding. The yielding of the liner causes even higher interfacial stress. The instability of the debonded portion is evaluated by the energy release rate obtained based on the virtual crack closure technique.
机译：正在为未来的空间车辆开发CFRP低温罐以减少燃料箱的重量。在本研究中，通过有限元分析讨论了具有铝合金衬里的CFRP罐的损伤问题，该有限元分析不仅对内部压力进行了高热应力。由于在低温和压力测试期间观察到CFRP层和铝衬里之间的宽剥离部分，因此特别研究了在罐的圆柱形部分中围绕衬里厚度变化的界面应力分布。发现所获得的界面应力的幅度足够大以引起剥离。衬里的屈服导致甚至更高的界面应力。通过基于虚拟裂纹闭合技术获得的能量释放速率来评估禁止部分的不稳定性。

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