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Evaluation of tensile properties of fiber metal laminates under different strain rates
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering ( IF 2.3 ) Pub Date : 2021-10-28 , DOI: 10.1177/09544089211053063
Muhammad Yasir Khalid 1 , Zia Ullah Arif 1 , Waqas Ahmed 1 , Hassan Arshad 1
Affiliation  

There has been an ever-going need for materials containing excellent mechanical properties, lower density, and improved fuel efficiency in the aerospace industry. To date, Fiber Metal Laminates (FMLs) are a prime choice for aerospace applications. The components of aircraft are subjected to various mechanical loadings under operating conditions; therefore, an in-depth understanding of material behavior under expected loading conditions is imperative for the meticulous design and manufacturing of these components. To evaluate the tensile behavior of the FMLs containing Aluminum 7075-T6 sheets as a metallic phase was the primary aim of this study. Furthermore, the manufactured composites were treated with the processes including surface de-greasing, mechanical abrasion, and anodizing. In order to perform mechanical characterization, uniaxial tensile tests were conducted at various strain rates 2×10−4 s−1, 5×10−4 s−1 and 8×10−4 s−1. The FMLs were fabricated through vacuum-assisted resin transfer molding (VARTM) process. The results revealed that FMLs based different combinations of the fiber and metal constituents exhibited a low degree of strain rate-sensitivity. In the case of CARALL, 1.7% increase in tensile strength was observed, and, its tensile strength was increased from 741 MPa to 754 MPa. Whereas, ARALL and GLARE laminates exhibited high degree of strain rate-sensitivity. When the strain rate is increased from 2×10−4 s−1, 5×10−4 s−1 and 8×10−4 s−1 the values are increased in the following patterns: 389 MPa, 411 MPa, and 475 MPa for GLARE laminates, and 253 MPa, 298 MPa 352 MPa for ARALL laminates. Thus, 39% and 22% increase in the tensile strengths were noted for ARALL and GLARE laminates, respectively.



中文翻译:

不同应变率下纤维金属层压板的拉伸性能评价

航空航天工业一直需要具有优异机械性能、较低密度和提高燃料效率的材料。迄今为止,纤维金属层压板 (FML) 是航空航天应用的首选。飞行器的部件在运行条件下承受各种机械载荷;因此,深入了解预期负载条件下的材料行为对于这些组件的精心设计和制造至关重要。本研究的主要目的是评估含有 7075-T6 铝板作为金属相的 FML 的拉伸行为。此外,制造的复合材料经过表面脱脂、机械磨损和阳极氧化等工艺处理。为了进行机械表征,-4 s -1、5×10 -4 s -1和8×10 -4 s -1。FML 是通过真空辅助树脂传递模塑 (VARTM) 工艺制造的。结果表明,基于纤维和金属成分的不同组合的 FML 表现出低程度的应变率敏感性。在 CARALL 的情况下,观察到拉伸强度增加了 1.7%,并且其拉伸强度从 741 MPa 增加到 754 MPa。而 ARALL 和 GLARE 层压板则表现出高度的应变率敏感性。当应变速率从 2×10 -4 s -1、5×10 -4 s -1和 8×10 -4 s 增加时-1值按以下模式增加:GLARE 层压板为 389 MPa、411 MPa 和 475 MPa,ARALL 层压板为 253 MPa、298 MPa 和 352 MPa。因此,ARALL 和 GLARE 层压板的拉伸强度分别增加了 39% 和 22%。

更新日期:2021-10-28
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