复合材料单筋板失效后的材料性能退化方法研究  

Research on Progressive Damage of Composite Stiffened Panels during Postbuckling Analysis

作　　者：张昭[1] 袁菲[1] 李新祥[1] Zhang Zhao;Yuan Fei;Li Xinxiang(National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research Institute of China,Xi'an Shaanxi 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：《飞行器强度研究》2024年第1期6-13,共8页Aircraft Strength Research

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,本文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 pattern.composite damage is a complex progressive process.in order to predict the strength and damage revolution of stiffened panels under compressive load,sudden degradation model and three kinds of continuum damage models are used to numerically simulate the calculation of test specimen.the comparison between experiment results and numerical simulation results shows that each of the four damage degradation models can predict the strength of stiffened panels.comparing to other models,constant continuum damage models has the highest accuracy.

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：TB3[一般工业技术—材料科学与工程]