摘要
对中温固化高韧性环氧树脂混杂复合材料力学性能进行了试验及数值模拟研究。首先,采用热熔法分别制备了碳纤维单向预浸料、高强玻璃纤维单向预浸料和芳纶纤维单向预浸料,并通过热压罐法制备单种预浸料铺层和不同纤维预浸料层间混合铺层方式铺贴组合的复合材料层合板;其次,对其拉伸、压缩力学性能进行测试,得到应力应变曲线及强度、刚度等关键性能;最后,建立混杂纤维层合板复合材料力学数值模拟模型,并引入Hashin强度准则对混杂复合材料进行失效力学性能评估,与实测值对比验证其准确性。结果表明,不同纤维预浸料的层间混杂,使混杂复合材料发挥协同效应,优化性能,且混杂复合材料理论计算模型得到的数据接近实测值,为混杂纤维复合材料的强度设计提供理论依据。
In this paper,the mechanical properties of mid-temperature cured high toughness epoxy resin hybrid composites were investigated.Firstly,carbon fiber unidirectional prepreg,high-strength glass fiber unidirectional prepreg,and aramid fiber unidirectional prepreg were prepared by the hot-melt method,and a single prepreg layer and hybrid composites with different fibers were prepared by the autoclave method.Secondly,the tensile and compressive mechanical properties are tested and key performances such as stress-strain curve,strength,and stiffness were obtained.Finally,a theoretical model of equivalent tensile stiffness of hybrid fiber laminate composites was established and the Hashin strength criterion was introduced to evaluate the strength of the composites,the accuracy of which was verified by comparison with the measured values.The results showed that the interlayer mixing of different fiber prepregs allowed the hybrid composite to exert synergistic effects,optimize performance.The data obtained from the theoretical calculation model of the hybrid composite was close to the measured values,providing a theoretical basis for the strength design of the hybrid fiber.
作者
乌云其其格
付宇彤
高旭豪
姚学锋
Wuyunqiqige;FU Yutong;GAO Xuhao;YAO Xuefeng(Composite Technology Center,AVIC Manufacturing Technology Institute,Beijing 101300,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China)
出处
《航空制造技术》
2020年第22期14-22,共9页
Aeronautical Manufacturing Technology
关键词
中温固化环氧树脂
混杂复合材料
力学性能
强度
损伤
Medium temperature curing epoxy resin
Hybrid composites
Mechanical property
Strength
Failure
作者简介
通讯作者:乌云其其格,博士,研究员,主要从事树脂基复合材料用树脂及预浸料方面的科研工作,负责完成多项国防课题。以第一作者发表论文60多篇,以第一申请人申请授权的专利2项。获得航空工业科学技术进步一等奖3次,二等奖2次,三等奖1次,国防科学技术进步一等奖,荣立个人二等功1次,E–mail:wuyunqiqige 2006@126.com。
