Fibre reinforced plastic tubes with balanced off-axis ply orientation exhibit excellent mechanical properties and are widely used in various types of structures. In this study, a theoretical prediction model was proposed to determine the overall buckling load and the failure mode of fibre reinforced plastic laminated tubes with off-axis ply orientation under axial compression. This model considers the transverse shear effect and adopts Puck failure criteria to perform an analysis based on deduced three-dimensional stress and strain fields. A series of carbon fibre reinforced plastics tubes with varying off-axis ply orientations and lengths were designed and prepared. Axial compression tests with effective end-reinforcement and hinge support were performed to validate the proposed prediction model. The results indicated that the predicted model results were in good agreement with the test results, with respect to ultimate loads, failure modes, and locations of failure. Parametric analysis on the influence of transverse shear effect was also conducted, which further explained the influencing degree of transverse shear effect considering different tube lengths, ply sequences, and initial deflection.

中文翻译：

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基于Puck失效准则的平衡离轴层向纤维增强塑料层压管整体屈曲预测模型

具有平衡离轴层板取向的纤维增强塑料管表现出优异的机械性能，广泛用于各种类型的结构。在这项研究中，提出了一个理论预测模型来确定轴向压缩下离轴层取向的纤维增强塑料层压管的整体屈曲载荷和失效模式。该模型考虑了横向剪切效应，采用 Puck 破坏准则，基于推导出的三维应力和应变场进行分析。设计和制备了一系列具有不同离轴层方向和长度的碳纤维增强塑料管。进行了具有有效端部加固和铰链支撑的轴向压缩测试，以验证所提出的预测模型。结果表明，在极限载荷、失效模式和失效位置方面，预测的模型结果与测试结果非常吻合。还对横向剪切效应的影响进行了参数化分析，进一步说明了考虑不同管长、层序和初始挠度时横向剪切效应的影响程度。