复合材料单筋板在轴压下失效后材料性能退化方法  

Damage Degradation of Composite Stiffened Panels during Post-buckling

作　　者：袁菲[1] 李新祥[1] YUAN Fei;LI Xin-xiang(National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research institute of China,Xi'an 710065,China)

机构地区：[1]中国飞机强度研究所强度与结构完整性全国重点实验室,西安710065

出　　处：《科学技术与工程》2025年第9期3931-3937,共7页Science Technology and Engineering

基　　金：民机科研项目(MJ-2015-F-038,MJ-2016-F-01)。

摘　　要：复合材料在航空航天等工程中应用非常广泛,对其材料结构的损伤累计及失效规律等力学行为进行分析研究,具有重大的工程价值。为了预测复合材料加筋壁板在压缩工况下的强度及损伤扩展,以压缩载荷下帽型单筋板为例,分别采用了1种瞬时刚度退化和3种连续刚度退化模型进行分析对比,通过对单元中材料点的刚度折减,模拟了复合材料损伤演化的过程,并将试验结果与分析结果相对比。对比结果表明:4种损伤退化模型均可较为准确地预测压缩工况下加筋壁板的承载能力以及损伤范围;与其他模型相比,连续损伤退化模型中的常数型模型精度最高。研究结果为复合材料加筋壁板的力学性能研究提供了理论指导。Composite material is widely used in aerospace field.It is important to research the damage process of composite and its failure mode.Composite damage is a complex progressive process.In order to predict the strength and damage propagation of reinforced composite wall panels under compression conditions,taking the cap shaped single rib panel under compression load as an example,one instantaneous stiffness degradation model and three continuous stiffness degradation models were used for analysis and comparison.By reducing the stiffness of material points in the element,the damage evolution process of composite materials was simulated,and the experimental results were compared with the analysis results.The comparison results show that all four damage degradation models can accurately predict the bearing capacity and damage range of reinforced wall panels under compression conditions.Compared with other models,the constant type model in the continuous damage degradation model has the highest accuracy.The research results provide theoretical guidance for the study of mechanical properties of composite reinforced wall panels.

关 键 词：复合材料 渐进破坏 非线性衰减 加筋壁板 后屈曲 

分 类 号：V214.8[航空宇航科学与技术—航空宇航推进理论与工程]