Anisotropic elastic constants of lotus-type porous copper: measurements and micromechanics modeling
Anisotropic elastic constants of lotus-type porous copper: measurements and micromechanics modeling
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DOI：
10.1016/s1359-6454(02)00228-8
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发表时间：
2002-09-20
期刊：
影响因子：
9.4
通讯作者：
Nakajima, H
中科院分区：
文献类型：
--
作者：
Ichitsubo, T;Tane, M;Nakajima, H
我们研究了莲花型多孔铜的弹性常数，将其视为一种以c轴沿孔纵向呈六方弹性对称的复合材料。我们结合使用共振超声光谱和电磁共振方法来确定复合材料的弹性常数。由此产生的杨氏模量，平行于 E 的杨氏模量随孔隙率线性下降，c(33) 随孔隙率缓慢下降，而垂直于 E 的杨氏模量和 c(11) 则先快速下降，然后缓慢下降。考虑铜基体弹性各向异性的微观力学计算可以重现测量的各向异性弹性常数。这表明可以使用微观力学建模通过本方法来预测和设计各种类型的多孔金属的弹性性能。 (C) 2002 Acta Materialia Inc. 由 Elsevier Science Ltd 出版。保留所有权利。
We studied the elastic constants of a lotus-type porous copper, regarding it as a composite material showing hexagonal elastic symmetry with the c-axis along the longitudinal direction of the pores. We used the combination of resonance ultrasound spectroscopy and electromagnetic acoustic resonance methods to determine the elastic constants of the composite. The resulting Young's modulus E-parallel to decreases linearly and c(33) does slowly with porosity, while E-perpendicular to and c(11) drop rapidly and then slowly. Micromechanics calculations considering the elastic anisotropy of the copper matrix can reproduce the measured anisotropic elastic constants. This indicates that the elastic properties of various types of porous metals can be predicted and designed with the present approach using micromechanics modeling. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.