低温下复合材料层合板的层间应力分析  

Interlaminar Stress Analysis of Composite Laminates under Cryogenic Condition

作　　者：曾红燕[1] 董焱章[1] 尹长城[1] 

机构地区：[1]湖北汽车工业学院汽车工程学院,湖北十堰442002

出　　处：《湖北汽车工业学院学报》2015年第2期41-44,共4页Journal of Hubei University Of Automotive Technology

基　　金：湖北省自然科学基金项目(2014CFB629)

摘　　要：以低温推进剂的纤维增强树脂基复合材料燃料罐为对象,研究在低温环境下复合材料/结构的力学性能。基于细观力学模型,分别建立了用于复合材料贮箱的2种典型复合材料E-Glass/Epoxy和Graphite/Epoxy低温环境下的本构关系。采用有限元法,通过对低温环境下典型铺层的层合板自由边界附近层间应力的分析,讨论了低温对E-Glass/Epoxy和Graphite/Epoxy这2种典型复合材料层合板自由边界附近层间应力分布的影响。结果表明:温度的变化对层合板层间应力分布的影响较明显,且温度越低层合板的最大层间应力值越大。研究成果将对低温推进剂的纤维增强树脂基复合材料燃料罐设计提供一定的参考价值。With focusing on the fiber reinforced resin matrix composite materials fuel cylinder used for the cryogenic propellant,the mechanical properties of composite materials/structures at cryogenic tem-perature were researched. Mechanical and thermal constitutive relations of E-Glass/Epoxy and Graph-ite/Epoxy were designed respectively for the composite materials fuel cylinder on the basis of the com-posite micro-mechanical model. The stress distribution features around the free boundary of the typical laminates at the cryogenic temperature were analyzed by the finite element method, and the effect of cryogenic temperature on interlaminar stress distribution features around the free boundary of E-Glass/Epoxy and Graphite/Epoxy laminates was discussed. The results show that the interlaminar stress distri-bution is affected by cryogenic conditions obviously and the maximum interlaminar stress increases as temperature decreases. The research results provide a reference value for the design of cryogenic propel-lants fiber reinforced resin matrix composite fuel cylinder.

关 键 词：复合材料 低温 弹性模量 力学本构关系 层间应力 

分 类 号：TB332[一般工业技术—材料科学与工程]