层内混杂型机织织物增强复合材料的力学性能(英文)

Mechanical Properties of Intra-hybrid Woven Fabric Composites

在很多领域,如汽车,飞机,土木工程及房屋装饰等,随着对复合材料需求的增长,碳纤维已经成为了一种不可或缺的增强材料。这主要归因于其优异的力学性能,如轻质、高硬度、高强度、抗腐蚀、抗疲劳及优异的结构适用性等。黄麻纤维纯天然有着优异的透气性和吸收性。玻璃纤维也是一种重要的纤维而且已经得到了广泛应用。与碳纤维相比,玻璃纤维的力学性能较低而且密度较大,但是同时它也具有低廉的价格。为了充分利用这些纤维的优势,本研究中使用了混杂织物的增强结构,采用碳纤维-玻璃纤维混杂型粗纱布和玻璃纤维-黄麻纤维混杂型粗纱布作为增强结构,以手糊成型的工艺制备了复合材料。对复合材料不同方向的拉伸试验(0°,5°,15°,45°,90°)进行了测试,并使用声发射系统分析了材料的破坏特征。材料的低周疲劳性能也同样进行了分析和研究。

Along with the increasing requirement of fiber reinforced plastic( FRP) in many areas,such as automobile, airplane,civil engineering and housing products,carbon fiber has already became an indispensable reinforcement due to its excellent properties,such as low density,high stiffness,high strength,corrosion resistance,long fatigue life,adaptability to the intended function of the structure and so on. Jute fiber has excellent breathable and absorbent properties. Glass fiber is also an important fiber which already gained wide use. Compared with carbon fiber,glass fiber has lower mechanical property and higher density but cheaper. In order to make full use of their advantages,intra-hybrid fabric form was established. Glass / Carbon hybrid roving cloth,Glass / Jute hybrid roving cloth,( Type- A,Type- B) was used to fabricate FRP composite through hand lay-up method. The tensile test on different directions( 0°,5°,15°,45°,90°) acoustic emission( AE) measurement were performed. Then,low-cycle-fatigue test and property evaluation were also performed.