CAJ | 학술논문

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。
이저온추진제적섬유증강수지기복합재료연료관위대상，연구재저온배경하복합재료/결구적역학성능。기우세관역학모형，분별건립료용우복합재료저상적2충전형복합재료E-Glass/Epoxy화Graphite/Epoxy저온배경하적본구관계。채용유한원법，통과대저온배경하전형포층적층합판자유변계부근층간응력적분석，토론료저온대E-Glass/Epoxy화Graphite/Epoxy저2충전형복합재료층합판자유변계부근층간응력분포적영향。결과표명：온도적변화대층합판층간응력분포적영향교명현，차온도월저층합판적최대층간응력치월대。연구성과장대저온추진제적섬유증강수지기복합재료연료관설계제공일정적삼고개치。
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.