约束结构对连续玻璃纤维增强聚氨酯复合材料板簧性能的影响  

INFLUENCE OF CONFINEMENT STRUCTURE ON PROPERTIES OF CONTINUOUS GLASS FIBER REINFORCED POLYURETHANE COMPOSITE LEAF SPRINGS

作　　者：李波 张民爱 杨建 王钧[2] LI Bo;ZHANG Min-ai;YANG Jian;WANG Jun(The Research and Development Center of Guangzhou Automobile Group Co.,Ltd.,Guangzhou 511434,China;Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广州511434 [2]武汉理工大学,武汉430070

出　　处：《复合材料科学与工程》2020年第10期82-87,共6页Composites Science and Engineering

摘　　要：为了改善连续玻璃纤维增强聚氨酯(GF/PUR)复合材料作为弹性体的力学性能,采用真空树脂导入成型工艺制备了具有环向缠绕玻璃纤维纱、玻璃纤维布、玻璃纤维套管和两层玻璃纤维套管的复合材料板簧,对其弯曲模量、弯曲强度、疲劳性能以及阻尼性能进行了研究。结果表明:约束结构在一定程度上会降低复合材料板簧的弯曲模量和弯曲强度,但是其疲劳性能和阻尼性能明显提升。其中,纤维布带作为约束结构时,复合材料板簧综合性能较好,其弯曲模量为26201.16 MPa,弯曲强度为443.12 MPa,40%应力水平下循环次数达到2109,自振频率和损耗因子分别为215 Hz和0.071。In order to improve the mechanical properties of continuous glass fiber reinforced polyurethane(GF/PUR)composites as elastomers,the composite leaf springs with circumferential winding glass fiber yarn,glass fiber cloth,glass fiber bushing and two layers of glass fiber bushing were prepared by vacuum resin introduction molding process.The bending modulus,bending strength,fatigue property and damping property were studied.The results show that the restrained structure can reduce the bending modulus and strength of the composite spring to some extent,but its fatigue and damping properties are improved obviously.Among them,when the fiber cloth belt is used as the confinement structure,the composite leaf spring has better comprehensive performance,the bending modulus is 26201.16 MPa,the bending strength is 443.12 MPa,the cycle times of 40%stress level is 2109,and the natural frequency and loss factor are 215 Hz and 0.071,respectively.

关 键 词：GF/PUR复合材料 玻璃纤维 约束结构 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]