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轴对称载荷下横观各向同性泡沫材料的屈服面

陈伟 卢子兴

陈伟, 卢子兴. 轴对称载荷下横观各向同性泡沫材料的屈服面[J]. 北京航空航天大学学报, 2010, 36(7): 853-856.
引用本文: 陈伟, 卢子兴. 轴对称载荷下横观各向同性泡沫材料的屈服面[J]. 北京航空航天大学学报, 2010, 36(7): 853-856.
Chen Wei, Lu Zixing. Yield surface of transversely isotropic foams under axisymmetric loadings[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(7): 853-856. (in Chinese)
Citation: Chen Wei, Lu Zixing. Yield surface of transversely isotropic foams under axisymmetric loadings[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(7): 853-856. (in Chinese)

轴对称载荷下横观各向同性泡沫材料的屈服面

基金项目: 国家自然科学基金资助项目(10572013,10932001)
详细信息
  • 中图分类号: TB 301

Yield surface of transversely isotropic foams under axisymmetric loadings

  • 摘要: 利用二维有效应力和平均应力的描述方法,推导出三维横观各向同性泡沫材料在轴对称载荷下的特征平均应力、特征应力以及特征应变的表达式,得到用特征平均应力和特征应力描述的屈服面模型;并通过对面心立方单胞模型进行有限元分析,研究了横观各向同性泡沫材料的泡孔长径比对弹性性能和屈服面的影响.结果表明:随泡孔长径比的增加,泡孔伸长方向对应的泡沫模量增加,而与其垂直方向的泡沫模量则减小,且屈服面发生了逆时针转动;得到的屈服面模型与Gurson修正模型基本一致,且同有限元结果相符,为横观各向同性泡沫提供了一种新的屈服面描述.

     

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出版历程
  • 收稿日期:  2009-05-06
  • 网络出版日期:  2010-07-30

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