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Static tensile properties for jute fiber reinforced composite

机译:黄麻纤维增强复合材料的静态拉伸性能

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In fiber reinforced composite, glass fiber reinforced plastics (GFRP) are widely used. But they have a disadvantage from the viewpoint of reuse and recycling. Instead of GFRP, natural fibers such as bamboo, jute, kenaf and hemp fibers are focused upon for environmental friendliness. In this study, jute fiber is chosen as reinforcement because of the huge market and low cost. Polypropylene and emulsion type biodegradable resins are used as the matrix because of their recycling properties and cost. The tensile properties for Jute Fiber Reinforced Plastics (JFRP) are examined. There are few reports about strength reduction from the viewpoint of residual strain and damage accumulation. So in this study, cyclic loading (load-unload) tests were conducted for improving the mechanical properties. Heat treatment is also conducted for JFRP to examine the strength. As a result, the following conclusions are obtained. Young's modulus is improved for load-unload tensile tests. In the case where the load is less than 75% of the ultimate load and the number of cycles is ten, the residual strain has no effect on the tensile strength after load-unload tests. In the case where the load is 82.5% of the ultimate load, the tensile strength decreased. In the case where the load-unload test used 50% and 70% of the ultimate load, the residual strains are 0.12% and 0.40% respectively. There is no effect for tensile strength in the case where heat treatment is conducted to the pre-preg using PLA resin.
机译:在纤维增强复合材料中,广泛使用玻璃纤维增​​强塑料(GFRP)。但从重用和回收的角度来看,它们具有缺点。而不是GFRP,竹,黄麻,kEnaf和大麻纤维等天然纤维,专注于环境友好。在这项研究中,由于巨大的市场和低成本,珍惜纤维被选为钢筋。由于其再循环性能和成本,聚丙烯和乳液型可生物降解树脂用作基质。检查了黄麻纤维增强塑料(JFRP)的拉伸性能。从残留应变和损伤积累的观点来看,很少有关于强度减少的报道。因此,在本研究中,进行循环加载(负载卸载)测试以改善机械性能。还对JFRP进行热处理来检查强度。结果,获得了以下结论。用于负载卸载拉伸试验的杨氏模量得到改善。在载荷小于最终载荷的75%的情况下,循环次数为10,残留的菌株对负载卸载测试后的拉伸强度没有影响。在载荷为极限载荷的82.5%的情况下,拉伸强度降低。在载荷卸载测试使用50%和70%的最终载荷的情况下,残留菌株分别为0.12%和0.40%。在使用PLA树脂对预先预先处理的情况下,没有对拉伸强度的影响。

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