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Study of the effects of low-velocity impact on a composite bicycle down tube

机译：低速冲击对复合自行车下管的影响研究

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摘要

This study evaluates, by experiment and numerical analysis, the effects of a pebble thrown from the front wheel and hitting the down tube of a carbon-epoxy bicycle frame (the Guru Cycles Photon R). The performance of the down tube is based on the retention of its mechanical properties when performing a load test before and after an impact event. The results show that the down tube experiences a 4-5% loss of rigidity after an impact of 1.5-6 J. A parametric analysis of the effects of fibre orientation established a down tube stacking sequence that would increase its rigidity by 5.6%. With this new configuration, the effects of an impact on the tube was reduced and its residual rigidity after 1.5-6 J impacts increased by 1.5-2%.
机译：这项研究通过实验和数值分析评估了从前轮抛出的小石子撞击碳环氧自行车车架（Guru Cycles Photon R）的下管的影响。落管的性能基于在撞击事件发生之前和之后进行负载测试时其机械性能的保持性。结果表明，在受到1.5-6 J的冲击后，下管的刚度降低了4-5％。对纤维取向的影响进行参数分析后，确定了下管堆叠顺序，可将其刚性提高5.6％。通过这种新配置，减少了对管的冲击影响，并且在1.5-6 J冲击后其残余刚度增加了1.5-2％。

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