Abstract

In this work, a novel laminated polyester composite that contains waste tire rubber particles and glass fiber is developed. This composite is expected to possess better mechanical and physical properties, than other conventional polyester composites which consist of CaCO₃ and glass fiber. This novel composite can be used in car bodies and in the aviation industry. Flat laminated specimens from both composites are prepared by hand layup. Tensile and impact testing are done to evaluate and compare the mechanical properties of these composites. An experiment is done to study the damage that can occur to the novel composite when drilling holes which can be used for joining composite laminates with other parts. Twelve trials were made to reduce the damage by better selection of the drilling conditions. Peel up and push out delamination factors are calculated to investigate the damage. Digital optical microscope is used to investigate the fracture surface of broken specimens and the nature of drilling damage. Comparison between novel and conventional composites shows an improvement by approximately 47% and the density of the new composite decreases by 8%. The optimum drilling cutting speed is approximately 1150 rpm which gives the least delamination factor at the front and back of specimen.

Graphic Abstract

中文翻译：

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废轮胎橡胶聚酯复合材料层压板中钻孔造成的损坏评估

摘要

在这项工作中，开发了一种新型的层压聚酯复合材料，其中包含废轮胎橡胶颗粒和玻璃纤维。与其他由CaCO ₃组成的常规聚酯复合材料相比，该复合材料具有更好的机械和物理性能。和玻璃纤维。这种新颖的复合材料可用于车身和航空工业。两种复合材料制成的扁平层压样品均采用手工铺砌法制备。进行拉伸和冲击测试以评估和比较这些复合材料的机械性能。进行了一项实验来研究新型复合材料在钻孔时可能发生的损坏，该孔可用于将复合材料层压板与其他零件连接在一起。为了更好地选择钻孔条件，进行了十二次试验以减少损坏。计算剥离和推出分层因子以调查损坏情况。数字光学显微镜用于研究断裂试样的断裂表面和钻孔损伤的性质。新型和常规复合材料之间的比较显示出约47％的改善，而新复合材料的密度降低了8％。最佳的钻孔切割速度约为1150 rpm，这在样品的正面和背面给出了最小的分层系数。

图形摘要