Mechanical properties and energy absorption capability of functionally graded F2BCC lattice fabricated by SLM
Mechanical properties and energy absorption capability of functionally graded F2BCC lattice fabricated by SLM
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DOI：
10.1016/j.matdes.2018.01.059
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发表时间：
2018-04-15
影响因子：
8.4
通讯作者：
Ponnusamy, P.
中科院分区：
文献类型：
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作者：
Al-Saedi, Dheyaa S. J.;Masood, S. H.;Ponnusamy, P.
具有复杂内部设计的金属晶格结构可以使用选择性激光熔化（SLM）增材制造技术来制造。这些晶格结构由于其独特的性能，结合了轻质和高强度，因此在个人防护设备和包装等方面有许多应用。通过压缩实验和有限元分析，研究并比较了SLM工艺制备的Al-12 Si铝合金功能梯度和均匀F2 BCC点阵结构的力学性能和能量吸收能力。用扫描电子显微镜观察固体支撑体的直径和表面形貌。功能梯度晶格结构被发现表现出不同的变形行为相比，均匀的晶格结构。有限元分析的结果被发现是在定性协议与实验数据和预测的分析模型的梯度晶格结构。单位体积的总累积能量吸收在功能梯度晶格中比在均匀晶格中高。最后，确定了吉布森和阿什比三个解析方程的力学特性和系数，可用于估算其他SLM制备的功能梯度晶格结构的力学性能。(C)2018爱思唯尔有限公司版权所有。
Metallic lattice structures with complex internal design can be fabricated using selective laser melting (SLM) additive manufacturing technology. These lattice structures are finding many applications such as in personal protective equipment and packaging due to their distinctive properties, combining the lightweight and high strength. In this study, experimental compression tests and finite element analysis (FEA) were conducted to investigate and compare the mechanical properties and energy absorption capability of functionally graded and uniform F2BCC lattice structures made of Al-12Si aluminium alloy and manufactured by SLM process. The solid struts diameters and surface morphology were examined using scanning electron microscope. The functionally graded lattice structures were found to exhibit distinct deformation behaviour as compared to the uniform lattice structure. Results of finite element analysis were found to be in qualitative agreement with the experimental data and with the predictions of the analytical models for graded lattice structure. The total cumulative energy absorption per unit volume was higher in functionally graded lattice than in uniform lattice. Finally, mechanical characteristics and coefficients of three Gibson and Ashby analytical equations were also determined, which could be used to estimate the mechanical properties of other SLM fabricated functionally graded lattice structures. (C) 2018 Elsevier Ltd. All rights reserved.