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Applied Mathematics and Mechanics (English Edition) ›› 1992, Vol. 13 ›› Issue (8): 755-762.

• 论文 • 上一篇    下一篇

A MICROSCOPIC DAMAGE MODEL CONSIDERING THE CHANGE OF VOID SHAPE AND APPLICATION IN THE VOID CLOSING

朱明, 金泉林   

  1. Laboratory for Nonlinear Mechanics of Continuous Media, Institute of Mechanics, Chinese Academy of Sciences, Beijing
  • 收稿日期:1991-07-29 出版日期:1992-08-18 发布日期:1992-08-18
  • 通讯作者: Hsueh Dah-wei

A MICROSCOPIC DAMAGE MODEL CONSIDERING THE CHANGE OF VOID SHAPE AND APPLICATION IN THE VOID CLOSING

Zhu Ming, Jin Quan-lin   

  1. Laboratory for Nonlinear Mechanics of Continuous Media, Institute of Mechanics, Chinese Academy of Sciences, Beijing
  • Received:1991-07-29 Online:1992-08-18 Published:1992-08-18

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摘要： A microscopic damage model of ellipsoidal body containing ellipsoidal void for nonlinear matrix materials is developed under a particular coordinate. The change of void shape is considered in this model. The viscous restrained equation obtained from the model is affected by stress ∑ij, void volume fraction f, material strain rate exponent m as well as the void shape. Gurson’s equation is modified from the numerical solution. The modified equation is suitable for the case of nonlinear matrix materials and changeable voids. Lastly, the model is used to analyze the closing process of voids.

关键词: nonlinear material, ellipsoidal void, void shape, void closing

Abstract: A microscopic damage model of ellipsoidal body containing ellipsoidal void for nonlinear matrix materials is developed under a particular coordinate. The change of void shape is considered in this model. The viscous restrained equation obtained from the model is affected by stress ∑ij, void volume fraction f, material strain rate exponent m as well as the void shape. Gurson’s equation is modified from the numerical solution. The modified equation is suitable for the case of nonlinear matrix materials and changeable voids. Lastly, the model is used to analyze the closing process of voids.

Key words: nonlinear material, ellipsoidal void, void shape, void closing

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