纱罗网格织物铺层位置对聚丙烯/黄麻复合材料弯曲性能影响及有限元模拟  

Influences of Placement Position of Leno Mesh Fabric on Flexural Properties of PP/Jute Composite and Finite Element Simulation

作　　者：李苏文 吴华伟 王春红[1] 吴帅 刘胜凯[1] 左祺 张昊[1] 陈澄[1] Li Suwen;Wu Huawei;Wang Chunhong;Wu Shuai;Liu Shengkai;Zuo Qi;Zhang Hao;Chen Cheng(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;College of Engineering and Technology,Jiyang College of Zhejiang A&F University,Shaoxing 312000,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]浙江农林大学暨阳学院工程技术学院,浙江绍兴312000

出　　处：《工程塑料应用》2022年第11期67-73,共7页Engineering Plastics Application

基　　金：中国纺织工业联合会科技指导性计划项目(2021057);天津市研究生科研创新项目(2020YJSB063)。

摘　　要：以纱罗网格织物为增强体,通过模压工艺制备纱罗网格织物增强聚丙烯/黄麻复合材料,并结合三点弯曲试验和有限元分析探究纱罗网格织物不同铺层位置对复合材料弯曲性能影响,进一步分析复合材料弯曲损伤机理。结果表明,纱罗网格织物铺放在中上层时复合材料弯曲性能较好。当纱罗网格织物铺放在上层、中层和下层时,复合材料的弯曲强度相比于未带有纱罗网格织物的复合材料分别提高了19.28%,18.79%,5.30%,弯曲弹性模量分别提高了24.12%,18.24%,11.76%。通过有限元建立了纱罗网格织物铺在不同位置的聚丙烯/黄麻复合材料模型,分析了不同铺层位置下材料的弯曲损伤机理。当纱罗网格织物铺在复合材料上表面时,主要受到压力作用,而铺在下表面时,主要受到拉力作用。随着纱罗网格织物的下移,应力逐渐集中。因此纱罗网格织物铺放在下层时,损伤较大,力学性能较差。有限元模拟应力值与试验得到的应力值误差分别为4.48%(上层),2.74%(中层),3.27%(下层),模拟得到的载荷-位移曲线与弯曲试验得到的曲线吻合度较高。Based on the leno mesh fabric as the reinforced rib,the leno mesh fabric reinforced polypropylene(PP)/jute com‐posite was made with compression molding process.With the three-point flexural test and finite element analysis,the effects of the leno mesh fabric's different placement positions on the flexural performances of the composite were explored.Besides,the flexural damage mechanism of the composite was analyzed furthermore.The results show that the flexural performances of the composite are better when the leno mesh fabric is placed on the middle and upper layers.Compared with the composite without leno mesh fab‐ric,when the leno mesh fabric is placed on the upper,middle and lower layers,the flexural strength of the composite is increased by 19.28%,18.79%,5.30%,and the flexural modulus is increased by 24.12%,18.24%,and 11.76%,respectively.The PP/jute compos‐ite models with different placement positions of the leno mesh fabric were established by finite element,and the flexural damage mechanisms of the composite under different placement positions were analyzed.When the leno mesh fabric is placed on the upper layer,it is mainly subjected to pressure,while when it is placed on the lower layer,it is mainly subjected to tension.As the leno mesh fabric moves down,the stress gradually concentrates.Therefore,when the leno mesh fabric is placed on the lower layer,the damage is greater and the mechanical properties are poor.The stress value error between the finite element simulation and the flexur‐al test is 4.48%(upper),2.74%(middle)and 3.27%(lower),respectively,and the load-displacement curve obtained by the simula‐tion is highly consistent with the curve obtained by the flexural test.

关 键 词：黄麻纤维 聚丙烯 纱罗网格织物 弯曲性能 有限元模拟 复合材料 损伤机理 

分 类 号：TB332[一般工业技术—材料科学与工程]