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纤维缠绕复合材料损伤演化多尺度表征方法构建

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针对复合材料多尺度表征中以细观到宏观力学性能预测为主的问题,发展了包含细观到宏观结构力学性能预测和宏观到细观组分损伤演化表征的纤维缠绕复合材料损伤演化多尺度表征方法.通过确定纤维缠绕复合材料组分本构及力学参数,完成基于细观RFDRVE(Random fiber distributions representative volume element)的单向复合材料力学参数预测,进而实现了纤维缠绕复合材料NOL环的宏观力学性能预测.而后,通过分析NOL环宏观破坏情况,将损伤区域应变加载至RFDRVE,得到NOL环的细观损伤演化情况,并结合扫描电镜观测了细观损伤演化形貌.结果表明,不同缠绕张力下NOL环细观到宏观预测拉伸强度与平均试验拉伸强度的最大误差仅5.08%,且宏观到细观损伤分析能够表征NOL环细观组分上出现的纤维断裂、基体断裂和纤维-基体界面破坏.纤维缠绕复合材料损伤演化多尺度表征方法能实现细观到宏观结构力学性能预测和宏观到细观组分损伤演化表征.
Construction of a Multi-scale Characterization Method for Damage Evolution of Fiber-wound Composites
In order to solve the problem that the multiscale characterization of composites is mainly based on the mechanical property prediction from mesoscale to macroscale,a multiscale characterization method of damage evolution of fiber wound composites was developed.This method includes the prediction of structural mechanical properties from mesoscale to macroscale and the characterization of component damage evolution from macroscale to mesoscale.By determining the constitutive models and mechanical property parameters of fiber winding composites components,the mechanical property prediction of unidirectional composites based on mesoscale random fiber distributions representative volume element(RFDRVE)is completed.Then the macroscale mechanical properties of NOL rings of fiber wound composites were predicted.Besides,the mesoscale damage evolution behavior of NOL ring was obtained by analyzing the macroscopic damage situation of NOL ring and loading the damage strain to RFDRVE,and the mesoscale damage evolution morphology was observed by scanning electron microscopy(SEM).The results show that the maximum error of NOL rings between the mesoscale to macroscale prediction tensile strength and macroscale average tensile strength is only 5.08%under different winding tensions,and the macroscale to mesoscale can characterize the fiber fracture,matrix fracture,and fiber-matrix interface failure in the mesoscale components of NOL rings.The multiscale characterization system of damage evolution of fiber-wound composites can predict the structure mechanical properties from mesoscale to macroscale and characterize the components damage evolution from macroscale to mesoscale.

Fiber-wound compositesMultiscalePrediction of mechanical propertiesCharacterization of damage evolutionRepresentative volume element

寇光杰、何坤成、蔡辉、张小宁、刘梦庆、杨正伟

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火箭军工程大学导弹工程学院,西安 710025

火箭军工程大学核工程学院,西安 710025

纤维缠绕复合材料 多尺度 力学性能预测 损伤演化表征 代表性体积元

军队高层次人才创新工程国家自然科学基金国家自然科学基金陕西省科技创新团队

2022GCCRC-00452375558520755412022TD-62

2024

10.3873/j.issn.1000-1328.2024.08.016

宇航学报
中国宇航学会

宇航学报

CSTPCD北大核心
影响因子：0.887
ISSN：1000-1328
年,卷(期)：2024.45(8)