Composite Stress Corrosion Cracking Damage Mechanism of Metal-Lined Fiber Hoop-Wrapped Composite Cylinders
Composite Stress Corrosion Cracking Damage Mechanism of Metal-Lined Fiber Hoop-Wrapped Composite Cylinders
复制标题
金属衬里纤维环绕复合圆筒的复合应力腐蚀开裂损伤机理
DOI：
10.1166/sam.2018.3342
复制
发表时间：
2018-09
影响因子：
0.9
通讯作者：
Liu Linlin
中科院分区：
文献类型：
--
作者：
Xiang Zhong;Liu Linlin
采用一种新的包括宏观和微观两个层次的多尺度损伤模型，研究了金属内衬纤维箍缠绕复合材料圆筒缠绕层的应力腐蚀开裂损伤扩展。具有嵌入单元的多尺度模型包括复合材料的详细微观结构。利用扫描电子显微镜对缠绕层复合材料的应力腐蚀开裂进行了观察，建立了金属衬里纤维环箍缠绕复合材料圆筒的多尺度模型。采用两种多尺度损伤数值模型对损伤演化过程进行了模拟。多尺度研究表明，金属内衬纤维箍缠绕圆筒缠绕层裂纹在应力腐蚀作用下会沿轴向和径向扩展，但优先在轴向扩展。此外，这些现象与扫描电子显微镜观察到的情况很好地吻合。在微观研究的基础上，利用宏观模型探讨了环向裂纹对应力腐蚀裂纹扩展的影响。这一发现通过观察和模拟相结合的方法解释了应力腐蚀裂纹在圆筒缠绕层上的扩展机理。
This study aims to investigate the stress corrosion cracking (SCC) damage propagation of the wound layer of metal-lined fiber hoop-wrapped composite cylinders by using a new multi-scale damage model, including macro and micro levels. The multi-scale model with an embedded cell includes a detailed microstructure of the composite. Scanning electron microscopy (SEM) is used to observe the SCC in the wound-layer composites and established the multi-scale model of the metal-lined fiber hoop-wrapped composite cylinder. Two numerical damage multi-scale models are used for the simulation of the damage evolution. Multi-scale research indicates that the metal-lined fiber hoop-wrapped cylinder winding layer crack will be extended along the axial and radial directions under the effect of stress corrosion, but priority will be extended in the axial direction. Moreover, these phenomena are in good agreement with what the SEM observed. Based on the microscopic study, we use the macroscale model to explore the effects of circumferential crack on the SCC propagation. This finding explains the propagation mechanism of the SCC on the wound layer of the cylinders by combining the method of observation and simulation.