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首页> 外文会议>Asia-Pacific Conference on Shock amp; Impact Loads on Structures; 20031112-14; Changsha, Hunan,(CN) >ON FOAM IMPACT INDUCED DAMAGE WAVES IN REINFORCED CARBON-CARBON
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ON FOAM IMPACT INDUCED DAMAGE WAVES IN REINFORCED CARBON-CARBON

机译：碳纤维的泡沫冲击诱发损伤波研究

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摘要

This study discusses the existence of damage waves in RCC (Reinforced Carbon-Carbon) subjected to foam impact loads by re-examining and re-analysing the impact test results published by the CAIB (Columbia Accident Investigation Board) in their technical reports. There are two different failure patterns with widely different failure stresses. The first pattern is a half-through single crack associated with a lower stress at the crack-tip and the second pattern is the fragmentation of a through-hole with a stress level six times as large. The fragmentation pattern clearly indicates the existence of damage waves in the corresponding foam impact test. The solution of the new composite certification scheme, based on a hybrid numerical/experimental methodology and a damage wave code, is proposed. With the proposed technologies, one can map the test and modelling results in different experimental spaces, i.e. material testing space, small scale testing space and full scale testing space with the greatest compatibility so that three eminent features, i.e. robustness in ensuring safety, copiousness in cost-saving and adequacy in time reduction, can be achieved for various industrial applications, especially for computer aided engineering qualifications (CAEQ).
机译：这项研究通过重新检查和重新分析由CAIB（哥伦比亚事故调查委员会）在其技术报告中发布的冲击试验结果，讨论了承受泡沫冲击载荷的RCC（增强碳-碳）中损伤波的存在。有两种不同的失效模式，其失效应力差异很大。第一模式是与裂纹尖端处的较低应力相关的半贯通单裂纹，第二模式是应力水平为六倍的通孔的破裂。碎片图清楚地表明在相应的泡沫冲击试验中存在损伤波。提出了一种基于混合数值/实验方法和损伤波代码的新型复合认证方案的解决方案。利用所提出的技术，可以将测试和建模结果映射到具有最大兼容性的不同实验空间（即材料测试空间，小规模测试空间和满量程测试空间）中，从而确保了三个显着的特征，即确保安全性的鲁棒性，安全性。对于各种工业应用，尤其是计算机辅助工程认证（CAEQ），都可以实现节省成本和减少时间的充分性。

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