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《材料导报》期刊社  2017, Vol. 31 Issue (20): 147-151    https://doi.org/10.11896/j.issn.1005-023X.2017.020.030
  计算模拟 |
微孔结构对PMI泡沫准静态压缩性能的影响
周景隆, 李文晓, 薛鹏
同济大学航空航天与力学学院,上海 200092
The Effects of Microcell Structure on Quasi-static Compression Performance of PMI Foam
ZHOU Jinglong, LI Wenxiao, XUE Peng
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092
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摘要 基于BBC点集建立了聚甲基丙烯酰亚胺(PMI)闭孔泡沫的Kelvin十四面体模型和Laguerre模型,并采用有限元方法研究了其在准静态载荷作用下的压缩性能。分析了孔径大小、泡孔体积离散系数对压缩弹性模量、初始峰值应力和能量吸收能力的影响。结果表明:Kelvin十四面体模型可以较好地预测PMI泡沫的压缩弹性模量和峰值应力;在相同相对密度条件下,小孔径泡沫的初始峰值应力和能量吸收能力均高于大孔径泡沫,而压缩弹性模量则低于大孔径泡沫;随着泡孔体积离散系数的增大,闭孔PMI泡沫压缩弹性模量、初始峰值应力和能量吸收能力均减小。
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周景隆
李文晓
薛鹏
关键词:  聚甲基丙烯酰亚胺(PMI)闭孔泡沫  十四面体模型  Laguerre模型  弹性模量  初始峰值应力    
Abstract: On the basis of the BBC points set, the Kelvin tetrakaidecahedron and Laguerre tessellation models for the polymethacrylimide (PMI) closed-cell foam were established. The quasi-static compression performance was analyzed by finite element method. The effects of cell size and cell volume dispersion on compression modulus, initial peak stress, and energy absorptivity were discussed. Numerical results showed that the tetrakaidecahedron model can predict the compression elastic modulus and initial peak stress of the PMI foam quite well. Under the same relative density, the smaller cell size will lead to higher initial peak stress and higher energy absorption capacity,but lower compression elastic modulus. The compression elastic modulus, initial peak stress and energy absorption capacity of the closed-cell PMI foam decreases with the increasing cell volume dispersion.
Key words:  polymethacrylimide closed-cell foam    Kelvin tetrakaidecahedron model    Laguerre tessellation    elastic modulus    initial peak stress
出版日期:  2017-10-25      发布日期:  2018-05-05
ZTFLH:  TB332  
  TQ328.2  
作者简介:  周景隆:男,1990年生,硕士,主要研究方向为高分子及复合材料 E-mail:1433481@tongji.edu.cn 李文晓:通讯作者,女,1968年生,副教授,主要研究方向为高分子及复合材料 E-mail:wenxiaoli@tongji.edu.cn
引用本文:    
周景隆, 李文晓, 薛鹏. 微孔结构对PMI泡沫准静态压缩性能的影响[J]. 《材料导报》期刊社, 2017, 31(20): 147-151.
ZHOU Jinglong, LI Wenxiao, XUE Peng. The Effects of Microcell Structure on Quasi-static Compression Performance of PMI Foam. Materials Reports, 2017, 31(20): 147-151.
链接本文:  
https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.020.030  或          https://www.mater-rep.com/CN/Y2017/V31/I20/147
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