纤维增强复合材料的耐久性实验分析

Experimental Analysis of the Durability of Fiber Reinforced Composites

论文通过探讨腐蚀环境带给纤维增强复合材料耐久性的影响,通过借助于浸水试验、冻融试验、湿热试验进行探讨,认为性能较好的是碳纤维增强复合材料,基于暴露条件下并没有改变力学性能。耐久性最差的是玻璃纤维增强复合材料,不仅仅和水环境和碱环境有着直接的影响,同时和湿热环境以及冻融循环也有着直接的影响。浸水试验之后,GFRP抗压强度逐渐降低,极限应变也降低,但是弹性模量没有出现任何改变,水虽然可以脆化玻璃纤维,但是在浸水试验之后,没有改变力学性能。冻融循环试验之后,降低了极限应变和抗拉强度,没有改变弹性模量,可以说冻融循环过程脆化了纤维材料。关于湿热老化环境的影响而言,改变了GFRP抗拉强度和弹性模量,同时也改变了极限应变。

The thesis discusses the corrosion environment to influence the durability of fiber reinforced composite materials,by means of the water immersion test,freeze-thaw test,damp heat test were discussed,that is the good performance of carbon fiber reinforced composite material,based on the exposure conditions did not change the mechanical properties. The worst durability of the glass fiber reinforced composites,not only has a direct impact on water and alkali environment,but also has a direct impact on the hot and humid environment as well as the freezing and thawing cycles. After immersion test,GFRP compressive strength decreased gradually,the ultimate strain also decreased,but the elastic modulus without any change,even though the water can brittle glass fiber,but did not change after immersion test,mechanical properties. After freezing and thawing cycles,the limit strain and tensile strength are reduced,and the elastic modulus is not changed. In terms of the influence of hot and Humid Aging environment,the tensile strength and elastic modulus of GFRP are changed,and the ultimate strain is also changed.