The effect of thermal cycles on the mechanical properties of fiber-metal laminates
The effect of thermal cycles on the mechanical properties of fiber-metal laminates
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DOI：
10.1016/j.matdes.2012.06.038
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发表时间：
2012-12
影响因子：
8.4
通讯作者：
Adriana Costa;Danielle Silva;D. N. Travessa;E. C. Botelho
中科院分区：
文献类型：
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作者：
Adriana Costa;Danielle Silva;D. N. Travessa;E. C. Botelho
研究了热冲击循环对纤维-金属层合板力学性能的影响。FML板由两块1.6mm厚的AA2024铝板和两层单向玻璃纤维环氧树脂预浸料和两层玻璃纤维增强环氧树脂胶带组成的复合材料层组成。该套件通过手工铺叠和典型的真空袋技术制造。固化循环是在高压釜中在125 ± 5 ° C下持续90分钟并且高压釜压力为400kPa。从制造的板中取出的FML试样经受− 50和+80 °C之间的温度变化，这些温度之间具有快速转变。在1000和2000次循环后，对样品的拉伸和层间剪切强度进行评价，并与未暴露样品进行比较。2000次循环对应于商用飞机维护程序的典型C检查间隔。据观察，热冲击循环并没有导致显着的微观结构变化的FML，特别是在复合材料层。同样，没有观察到明显的影响FML的机械性能的热冲击循环。
The effect of thermal-shock cycles on the mechanical properties of fiber–metal laminates (FMLs) has been evaluated. FML plates were composed by two AA2024 Al sheets (1.6mm thick) and one composite ply formed by two layers of unidirectional glass fiber epoxy prepreg and two layers of epoxy adhesive tape of glass fiber reinforced epoxy adhesive. The set was manufactured by hand layup and typical vacuum bag technique. The curing cycle was in autoclave at 125±5°C for 90min and an autoclave pressure of 400kPa. FML coupons taken from the manufactured plate were submitted to temperature variations between −50 and +80°C, with a fast transition between these temperatures. Tensile and interlaminar shear strength were evaluated on samples after 1000 and 2000 cycles, and compared to nonexposed samples. 2000 Cycles corresponds to typical C Check interval for commercial aircraft maintenance programs. It was observed that the thermal-shock cycles did not result in significant microstructural changes on the FML, particularly on the composite ply. Similarly, no appreciable effect on the mechanical properties of FML was observed by the thermal-shock cycles.