Lu Hongbin, Sheng Dongfa, Fang Yuting, Yu Hongquan, Yang Fan
School of Civil Engineering, Southwest Forestry University, Kunming 650224, China.
Polymers (Basel). 2024 Nov 27;16(23):3319. doi: 10.3390/polym16233319.
The tensile properties of fiber metal laminates were examined at temperatures ranging from 30 °C to 180 °C in this paper through the integration of numerical simulation techniques, experimental measurements, and digital image correlation techniques. The laminates were initially modeled using finite elements, and the failure behavior of porous basalt-fiber-reinforced aluminum alloy plates was numerically simulated. Consequently, metal fiber laminate stress-strain responses were varied by numerous tensile experiments conducted at varying temperatures. Simultaneously, a scanning electron microscope was used to scan a porous basalt-fiber-reinforced aluminum alloy laminate at different temperatures to determine the tensile mechanical behavior and micro-damage morphology. Lastly, the laminate's dynamic response to the tensile process was observed through digital image correlation technology. The stress distribution was determined to be concentrated around circular openings through analysis. The strain distribution graph exhibited a "band" shape as the number of perforations increased. The findings indicate that fiber metal laminates lose tensile strength as temperatures increase. The ultimate tensile strength of the laminate decreases as the number of perforations increases at the same temperature. Complex damage mechanisms, including matrix debonding, fiber withdrawal, and matrix fracture, can be captured through scanning electron microscopy at varying temperatures. The tensile behavior and damage mechanisms of laminates with hole-containing structures under thermal conditions are examined, and the results can be used to inform the design and utilization of laminate structures.
本文通过数值模拟技术、实验测量和数字图像相关技术的结合，研究了纤维金属层合板在30℃至180℃温度范围内的拉伸性能。首先使用有限元对层合板进行建模，并对多孔玄武岩纤维增强铝合金板的失效行为进行了数值模拟。随后，通过在不同温度下进行的大量拉伸实验，得到了金属纤维层合板的应力-应变响应。同时，使用扫描电子显微镜对不同温度下的多孔玄武岩纤维增强铝合金层合板进行扫描，以确定其拉伸力学行为和微观损伤形态。最后，通过数字图像相关技术观察层合板在拉伸过程中的动态响应。通过分析确定应力分布集中在圆形开口周围。随着穿孔数量的增加，应变分布图呈现出“带状”形状。研究结果表明，纤维金属层合板的拉伸强度随温度升高而降低。在相同温度下，层合板的极限拉伸强度随着穿孔数量的增加而降低。通过扫描电子显微镜可以观察到不同温度下包括基体脱粘、纤维拔出和基体断裂在内的复杂损伤机制。研究了含孔结构层合板在热条件下的拉伸行为和损伤机制，其结果可为层合板结构的设计和应用提供参考。
