北京航空航天大学学报 ›› 1999, Vol. 25 ›› Issue (5): 561-564.

• 论文 • 上一篇    下一篇

聚氨酯泡沫塑料剪切力学性能的研究

卢子兴1, 谢若泽2, 田常津2, 刘小平3, 李怀祥3   

  1. 1. 北京航空航天大学 飞行器设计与应用力学系;
    2. 中国工程物理研究院 结构力学所;
    3. 中国工程物理研究院 化工材料研究所
  • 收稿日期:1998-07-23 出版日期:1999-05-31 发布日期:2010-11-19
  • 作者简介:男 38岁 副教授 100083 北京
  • 基金资助:

    国家自然科学基金(19672005),中国工程物理研究院科学技术基金(960318)和中科院力学研究所LNM开放实验室基金资助项目

Investigation into Shear Mechanical Properties of PUR Foamed Plastics

Lu Zixing1, Xie Ruoze2, Tian Changjin2, Liu Xiaoping3, Li Huaixiang3   

  1. 1. Beijing University of Aeronautics and Astronautics,Dept. of Flight Vehicle Design and Applied Mechanics;
    2. Southwest Institute of Structural Mechanics;
    3. Southwest Institute of Chemical Materials
  • Received:1998-07-23 Online:1999-05-31 Published:2010-11-19

摘要: 对聚氨酯泡沫塑料进行了低速扭转实验, 研究了这类材料的剪切力学行为, 确定了材料的剪切弹性模量和剪切破坏强度等力学性能参数.并且, 对扭转试件断口进行了扫描电镜分析,研究了泡沫塑料剪切破坏的机制.最后, 利用作者得到的理论公式,对聚氨酯泡沫塑料的剪切力学性能进行了理论预测.结果表明,理论预测值与实验结果相当一致.

Abstract: The polyurethane rigid foamed plastics are important light structural materials. To investigate their shear mechanical properties is quite necessary for their applications.By the low speed torsional experiments of PUR foamed plastics, their shear mechanical behavior has been studied here. With these experiments, their shear properties such as the shear modulus and strength of PUR foamed plastics have been determined. Furthermore, the fracture surface SEM analyses of PUR foamed plastics have also been done to investigate the mechanism of shear failure in foamed plastics. Finally, the theoretical predictions for shear mechanical properties of PUR foamed plastics are given by means of author's theoretical formulae. The predicted results agree quite well with the experimental results. Particularly, some results obtained in this paper are firstly reported.

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