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Numerical modeling of high strain compression of anisotropic elastic open-cell foams
Lu Zixing, Chen Xin, Zhang Jialei*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� Based on the anisotropic irregular model, the compressive mechanical properties of low-density open-cell elastic foams were simulated by finite element analysis. The compressive stress-strain curves and elastic collapse strength were obtained in order to investigate the influence of anisotropic ratio, random degrees and relative densities on the mechanical properties. The results show that the deformation mechanism is different when loads are applied in different directions, and strut buckling becomes the main deformation mechanism at large compressive strains. A larger anisotropic ratio leads to larger elastic collapse strength along the cell rising direction and lower elastic collapse strength in the vertical direction. Meanwhile, the higher random degree causes lower stress-strain curves in both directions. When λ =1, the effective stress-strain curves well accord with the experimental curves.
Keywords�� anisotropy   foams   mechanical properties   finite element method   high strain     
Received 2007-05-08;
Fund:

������Ȼ��ѧ����������Ŀ(10572013); �����н���ίԱ�Ṳ����Ŀ����ƻ�������Ŀ(XK100060522)

About author: ¬����(1960-),��,�ӱ���ǿ��,����,luzixing@buaa.edu.cn.
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¬����, ����, �ż���.�������Ե��Կ�����ĭѹ����Ϊ����ֵģ��[J]  �������պ����ѧѧ��, 2008,V34(05): 564-567
Lu Zixing, Chen Xin, Zhang Jialei.Numerical modeling of high strain compression of anisotropic elastic open-cell foams[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(05): 564-567
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