The Micromechanical Stress Field of Cermets Composite Containing Interfacial Arc-Microcracks

Ni, Xin Hua; Yao, Zhan Jun; Zheng, Jian; Kang, Jing

doi:10.4028/www.scientific.net/kem.353-358.1493

Cited by 2 publications

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“…is a tensor which is determined by the shape, elastic constant and volume fractions of particle and partial debonding interphase in the three-phase cell, and is associated with particle diameter [7]. S klmn is Eshebly tensor the particle.…”

Section: The Micromechanical Stress Fieldmentioning

confidence: 99%

Micromechanical Strength of Particle in Composite Ceramic with Partial Debonding Interphase

Ni¹,

Liu²,

Han³

et al. 2010

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The four-phase model is used to predict the strength of particles in composite ceramic with partial debonding interphase. Firstly the external strain of three-phase cell is determined. Based on the disturbance strain tensor of three-phase cell, the micromechanical stress field of the particle is obtained. Then based on the generalized thermodynamic force of the particle in damage process, the damage equivalent stress of the particle in the three-phase cell can be calculated. As the damage equivalent stress is equal to the ultimate stress of the particle, the micromechanical strength of particles in composite ceramic with partial debonding interphase is obtained. Finally, For Al2O3-ZrO2 composite ceramic with partial debonding interphase, the variations of the micromechanical strength of particles for different orientation angle and different particle diameter are analyzed. The result shows that the micromechanical strength of particles is determined by the 50° orientation three phase cell, and has obvious size dependence. The micromechanical strength of particle will decrease when the particle diameter increase.

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Section: The Micromechanical Stress Fieldmentioning

confidence: 99%