中国塑料 ›› 2009, Vol. 23 ›› Issue (09): 80-84 .DOI: 10.19491/j.issn.1001-9278.2009.09.018

• 标准与测试 • 上一篇    下一篇

脆性材料拉伸试样结构与应力集中关系研究

刘先锋 洪剑城 卜海涛 张雄伟 吴世见   

  1. 四川大学高分子科学与工程学院 四川大学高分子科学与工程学院
  • 收稿日期:2009-05-22 修回日期:2009-06-26 出版日期:2009-09-26 发布日期:2009-09-26

Study on Relationships Between Structures and Stress Concentration of Tensile Specimens of Brittle Materials

LIU Xian-Feng HONG Jian-cheng BU Hai-tao ZHANG Xiong-wei WU Shi-jian   

  • Received:2009-05-22 Revised:2009-06-26 Online:2009-09-26 Published:2009-09-26
  • Contact: WU Shi-jian

摘要: 利用UG软件建立三维模型,同时运用ANSYS有限元分析软件,模拟了脆性材料聚苯乙烯(PS)哑铃形拉伸试样在拉伸载荷下的应力分布,分析了试样过渡段不同几何结构对应力集中的影响。有限元分析结果表明,拉应力的最大值出现在过渡段圆弧1~3 mm的区域。并通过非线性拟合获得了几何参数与应力集中系数的关系式,分析结果可应用于脆性材料PS制品设计计算。

关键词: 拉伸试样, 过渡段结构, 应力集中, 模拟, 聚苯乙烯

Abstract: UG software was applied to formulate a three-dimensional model, based on which the tensile stress distribution in a polystyrene dumb-bell specimen was simulated using ANSYS finite element software. The factors causing stress concentration were analyzed in the different transitionary structures. The finite element analysis indicated that the maximal tensile stress occurred in domain of the transitionary circular arc 1~3 mm. The relationship between geometric parameter and stress concentration factor was formulated data fitting.

Key words: tensile specimens, transitionary structure, stress concentration, simulate, polystyrene