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| TENSILE STRENGTH FOR SPLITTING FAILURE OF BRITTLE PARTICLES WITH CONSIDERATION OF POISSON''''S RATIO | |
| 引用本文： | Guoming Hu*,Yanmin Wang,Pingbo Xie and Zhidong Pan Division of Powder & Particle Technology,College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,P. R. China *Author to whom correspondence should be addressed. E-mail: hu_guoming@hotmail.com. TENSILE STRENGTH FOR SPLITTING FAILURE OF BRITTLE PARTICLES WITH CONSIDERATION OF POISSON''''S RATIO[J]. 中国颗粒学报, 2004, 2(6) |
| 作者姓名： | Guoming Hu* Yanmin Wang Pingbo Xie and Zhidong Pan Division of Powder & Particle Technology College of Materials Science and Engineering South China University of Technology Guangzhou 510640 P. R. China *Author to whom correspondence should be addressed. E-mail: hu_guoming@hotmail.com |
| 作者单位： | Guoming Hu*，Yanmin Wang，Pingbo Xie and Zhidong Pan Division of Powder & Particle Technology，College of Materials Science and Engineering，South China University of Technology，Guangzhou 510640，P. R. China *Author to whom correspondence should be addressed. E-mail: hu_guoming@hotmail.com |
| 摘 要： | 1. Introduction The core mechanism of comminution could be reduced to the breakage of individual particles that occurs through contact with other particles or with the grinding media, or with the solid walls of the mill (Potapov & Campbell, 1994). When a particle is subjected to a load, the nature of the stress field around and within the brittle particle, its material properties, and the size and distribution of micro-flaws within the particle govern the size and shape distribution of the fra… |
TENSILE STRENGTH FOR SPLITTING FAILURE OF BRITTLE PARTICLES WITH CONSIDERATION OF POISSON''''S RATIO |
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| Guoming Hu,Yanmin Wang,Pingbo Xie and Zhidong Pan Division of Powder , Particle Technology,College of Materials Science and Engineering,South China University of Technology,Guangzhou ,P. R. China Author to whom correspondence should be addressed. E-mail: hu_guoming@hotmail.com. TENSILE STRENGTH FOR SPLITTING FAILURE OF BRITTLE PARTICLES WITH CONSIDERATION OF POISSON''''S RATIO[J]. China Particuology, 2004, 2(6) | |
| Authors: | Guoming Hu Yanmin Wang Pingbo Xie Zhidong Pan Division of Powder & Particle Technology College of Materials Science Engineering South China University of Technology Guangzhou P. R. China Author to whom correspondence should be addressed. E-mail: hu_guoming@hotmail.com |
| Affiliation: | Guoming Hu*,Yanmin Wang,Pingbo Xie and Zhidong Pan Division of Powder & Particle Technology,College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,P. R. China *Author to whom correspondence should be addressed. E-mail: hu_guoming@hotmail.com |
| Abstract: | The core mechanism of comminution could be reduced to the breakage of individual particles that occurs through contact with other particles or with the grinding media, or with the solid walls of the mill. When brittle particles are loaded in compression or by impact, substantial tensile stresses are induced within the particles. These tensile stresses are responsible for splitting failure of brittle particles. Since many engineering materials have Poissons ratios very close to 0.3, the influence of Poissons ratio on the tensile strength is neglected in many studies. In this paper, the state of stress in a spherical particle due to two diametrically opposed forces is analyzed theoretically. A simple equation for the tensile stress at the centre of the particle is obtained. It is found reasonable to propose this tensile stress at the instant of failure as the tensile strength of the particle. Moreover, this tensile strength is a function of the Poissons ratio of the material. As the state of stress along the z-axis in an irregular specimen tends to be similar to that in a spherical particle compressed diametrically with the same force, this tensile strength has some validity for irregular particles as well. Therefore, it could be used as the tensile strength for brittle particles in general. The effect of Poissons ratio on the ten-sile strength is discussed. |
| Keywords: | tensile strength Poissons ratio splitting failure brittle particle comminution |
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