混杂碳/玻纤维复合材料自行车轮辋的铺层优化分析及抗疲劳验证

Optimal layup analysis and anti-fatigue verification of bicycle rim with inter-ply hybrid carbon/glass fiber reinforced composites

对碳纤维/玻璃纤维层间混杂复合材料自行车轮辋进行数值优化分析,能够设计出具有价格适中、安全性能高、耐疲劳等特点的自行车轮辋。借助有限元分析对自行车轮辋模型进行服役状态下的力学行为模拟,能够为试验研究提供相对可靠的方案,减少试验过程中不必要的原料浪费,从而降低整个复合材料轮辋的设计和制备成本。本文通过ABAQUS软件构建了自行车轮辋模型,通过调整碳纤维预浸布铺层和玻璃纤维预浸布铺层的顺序、各铺层角度比例和顺序,计算轮辋在服役状态下的力学性能,通过比较各方案得到较优的设计方案。5万次加速疲劳测试结果表明:采用优化后的自行车轮辋侧壁铺层方案及凸缘铺层方案指导复合材料轮辋的制备,可以显著提高复合材料自行车轮辋的抗疲劳能力。

Bicycle rim with moderate cost,high safety performance,anti-fatigue and other characteristics can be designed through numerically optimal analysis of bicycle rim with inter-ply carbon/glass hybrid fiber reinforced polymer composites.To simulate the behavior of the composite bicycle rim in service by finite element analysis,it can provide relatively reliable scheme for experiments and minimize the waste of the raw material in experiments,and reduce the cost of design and preparation of the composite rim.In this paper,a bicycle rim model was constructed by adjusting the order of carbon fiber prepreg and glass fiber prepreg,the proportion and order of each ply orientation,and the mechanical properties of the rim in service were calculated by the software ABAQUS.The optimal layup scheme was obtained by comparing each scheme of the simulated composite rim in service.The results of accelerated fatigue test(50000 times)demonstrate that selecting the optimal lay up scheme of rim sidewall and rim bead to make the composite bicycle rim can significantly improve its anti-fatigue capability.