沈阳航空航天大学学报2025，Vol.42Issue(1)：14-24,11.DOI:10.3969/j.issn.2095-1248.2025.01.002
低温下复合材料层合板就位效应的细观力学分析
Micromechanical analysis of in-situ effect of composite laminates at cryogenic temperatures
摘要
Abstract
Composite material tanks are prone to microcracks at cryogenic temperature conditions.Accurately predicting the initiation and evolution of structural microcracks at cryogenic temperatures is crucial for the design and optimization of tank structures.An embedded multi-fiber representative volume element model was established to study the influence of cryogenic temperature conditions on the initiation and evolution of microcracks in composite laminates that considered the in-situ effect.This model was consisted of two 0° adjacent constraint layers and a 90° intermediate layer.Under transverse tensile loads and cryogenic temperature conditions,the microcrack initiation strain and tensile stress in the structure were obtained,and the initiation and evolution of microcracks were studied.The results show that cryogenic temperatures significantly influence the initiation location and evolution path of microcracks in structures.Microcracks are prone to occur in structures at cryogenic temperatures.The interface debonding is more likely to occur in regions with denser fiber arrangements at cryogenic temperatures.The thermal stress results in variations in microcrack initiation location between ordinary temperature and cryogenic temperature conditions.Notably,the structural damage evolution pattern in the intermediate layer remains consistent under both ordinary and cryogenic temperatures.关键词
复合材料层合板/代表性体积单元/细观力学/就位效应/微裂纹Key words
composite laminates/representative volume element/micromechanics/in-situ effect/microcracks引用本文复制引用
贺丹,张在强,常鑫..低温下复合材料层合板就位效应的细观力学分析[J].沈阳航空航天大学学报,2025,42(1):14-24,11.基金项目
国家重点研发计划项目(项目编号:2020YFA0711104) （项目编号:2020YFA0711104）
XX行动项目(项目编号:933A2AB1). （项目编号:933A2AB1）
