In this paper, properties of glass fiber-reinforced thermoplastic polymers (GFRTP) were evaluated using recycled polyester (rPET) for injection molding bicycle frame. The effect on thermal and mechanical properties of rPET reinforced glass chop fiber according to fiber cross section and fiber content ratio were studied. The crystallization temperature of glass fiber (GF)/rPET, a glass fiber added thermoplastic composite, was higher than the crystallization temperature of rPET pellet without a glass fiber, and the shape of the exothermic curve was sharper. Mechanical characteristics of a GF/rPET thermoplastic composites has been increased by increasing fiber contents, than above a certain level did not longer increased. And mechanical properties of flat glass fiber reinforced rPET with low void volume were most excellent. In order to prove the validity of the experimental results, finite element analysis of thermoplastic composite was performed by Digimat and Abaqus to compare the experimental values according to the cross sectional shape and volume fraction of glass fiber. The results of finite element analysis showed a similar tendency between the experimental results and the analysis results.

在本文中，玻璃纤维增​​强热塑性聚合物 (GFRTP) 的性能使用再生聚酯 (rPET) 进行注塑自行车车架评估。研究了纤维横截面和纤维含量比对 rPET 增强玻璃短切纤维的热性能和机械性能的影响。玻璃纤维（GF）/rPET是一种添加玻璃纤维的热塑性复合材料，其结晶温度高于不含玻璃纤维的rPET粒料的结晶温度，放热曲线形状更尖锐。GF/rPET 热塑性复合材料的机械特性已通过增加纤维含量而增加，超过一定水平则不再增加。并且具有低空隙体积的平板玻璃纤维增​​强rPET的机械性能最为优异。为了证明实验结果的有效性，利用Digimat和Abaqus对热塑性复合材料进行有限元分析，根据玻璃纤维的横截面形状和体积分数对实验值进行比较。有限元分析结果表明实验结果与分析结果之间存在相似的趋势。