Effect of Relative Density on Compressive Load Response of Crumpled Aluminium Foil Mesh
Effect of Relative Density on Compressive Load Response of Crumpled Aluminium Foil Mesh
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DOI：
10.3390/ma12234018
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发表时间：
2019-12
期刊：
影响因子：
3.4
通讯作者：
D. Hughes;E. Amalu;Tannaz Pak;R. Kennedy
中科院分区：
文献类型：
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作者：
D. Hughes;E. Amalu;Tannaz Pak;R. Kennedy
近年来，大量的金属泡沫和多孔金属被开发出来。由于这些材料的高成本，人们正在探索蜂窝金属材料的替代制造方法。皱巴巴的金属箔网，通过模具压缩技术制造，正在发展成为一种潜在的替代方法。然而，缺乏足够的负载响应数据限制了它们的应用。研究了开模和闭模压缩锻造不同密度皱褶铝箔网的单轴压缩载荷响应。采用膨胀金属工艺制造的0.05毫米厚铝片网。采用x射线计算机微层析成像技术对CAFM内部细胞结构进行成像。应力应变关系表明，无论相对密度如何，cafm均产生相同的载荷响应曲线。幂律函数ER=17110ρr3.6547和σY，E=53.092ρr2.2249定义了实际杨氏模量ER与有效屈服强度σY，E之间的关系。该研究提供了相对密度对cafm压缩性能影响的新知识，在轻量化结构设计中具有应用价值。
In recent years, a large number of metal foams and porous metals have been developed. Due to the high cost of these materials alternative manufacturing methods for cellular metallic materials are being explored. Crumpled metallic foil meshes, manufactured via die compression techniques, are evolving as a potential alternative method. However, the non-availability of sufficient data on their load response is limiting their uptake. Uniaxial compressive load response of crumpled aluminium foil meshes (CAFMs) of varying densities, forged by open and closed die compression, are studied. A 0.05 mm thick aluminium sheet mesh, manufactured by the expanded metal process is used. X-ray computed micro-tomography is employed to image the CAFM’s internal cellular structure. The stress-strain relation demonstrates that the CAFMs produce identical load response profile irrespective of their relative density. Power law functions ER=17110ρr3.6547 and σY,E=53.092ρr2.2249 define the relationships between real Young’s Modulus ER and effective yield strength, σY,E. The study provides new knowledge on the effect of relative density on the compressive properties of CAFMs which have applications across lightweight structural design.