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本文从理论分析和实验角度,对内压下长丝缠绕(FW)纤维增强复合材料管的刚性和强度进行了研究,内容包括缠绕角为30°、45°、55°、70°的FW管以及缠绕角为55°的FW夹层管的刚度、形变和强度。结果发现,缠绕角为45°和55°的FW管应变和位移的实验结果与理论值相吻合。根据最大应力失效准则,我们对内压下管材失效强度的预测提出了一种理论上的方法,把理论上的结果和实验结果相比较,发现它们之间存在着一定的关系。
In this paper, the stiffness and strength of filament-wound (FW) fiber-reinforced composite tubes under internal pressure were studied theoretically and experimentally, including FW tubes with winding angles of 30 °, 45 °, 55 ° and 70 ° And the stiffness, deformation and strength of the FW sandwich tube with a wrap angle of 55 °. The results show that the experimental results of the strain and displacement of the FW tube with the winding angles of 45 ° and 55 ° coincide with the theoretical values. According to the principle of maximum stress failure, we put forward a theoretical method to predict the failure strength of pipe under internal pressure. The theoretical results and experimental results are compared and found that there is a certain relationship between them.