Quasi-Static Transverse Crushing of Cylindrical Tubes in Laminated Composites

研究了在横向集中力线作用下钢管的屈曲或破碎问题。这项研究包括分析和实验两部分。最终产品将是一个用户友好的计算机代码，用于根据用于缠绕管的复合材料的性能预测复合管的抗压强度。如有必要，将根据一系列广泛的实验结果对代码进行核实和修改。复合材料结构以其高强度重量比和高刚度重量比而闻名。尽管在过去的20年里，人们对复合材料结构在飞机和航天领域的应用进行了大量的研究，但仍未解决管壳结构的分层、接头效应、冲击损伤和屈曲破坏等基本问题。本研究的结果将提升对管道和导管中使用的层压复合材料管的破碎强度和破坏的最新理解。

The research deals with the buckling or crushing of tubes under the action of a line of concentrated forces in the transverse direction. The research entails both an analytical and experimental component. The end product would be a user friendly computer code for predicting the crushing strength of the composite tubes based on the properties of the composite material used to wind the tubes. The code would be verified and modified, if necessary, based on the results of an extensive series of experiments. Composite structures are well known for their high strength-to-weight ratio and high rigidity-to-weight ratio. In spite of the extensive research in developing composite structures for airframes and space applications during the past 20 years, the basic issues such as delamination, effect of joints, impact damage, and buckling failure of tube and shell structures are yet to be resolved. The results of this research would upgrade the state-of-the-art understanding of the crushing strength and failure of laminated composite tubes used in pipes and conduits.