Damage Model and Failure Stress of Ceramic Particle Ni Base Alloy Composite

Jian Zheng; Xin Hua Ni; Jing Xin Kang

doi:10.4028/www.scientific.net/KEM.368-372.1654

Paper Titles

Prediction of the Properties of an Alumina Green Body Using an Artificial Neural Network by a New PSO-Gain Backpropagation Algorithm
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Optimal Design for Mechanical Properties of Composite with Combination of Genetic Algorithm and Artificial Neural Network
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Strength Model of Melt-Growth Composite Ceramics
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Enhanced Mechanism of Fracture Toughness in Cannon Bone
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Damage Model and Failure Stress of Ceramic Particle Ni Base Alloy Composite
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Damage Finite Element Analysis of Nano- Composite Ceramics
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Size Dependent Thermal Expansion Coefficient of Rod-Shaped Oxide Eutectic Ceramic
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Negative Thermal Expansion of Yb₂Mo₃O₁₂ and Lu₂Mo₃O₁₂
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Structure and Thermal Expansion Behavior of Dy_2-xGd_xMo₄O₁₅ Solid Solution
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Damage Model and Failure Stress of Ceramic Particle Ni Base Alloy Composite

Abstract:

For Ceramic particle Ni base alloy composite, experiments and damage evolution finite element analysis shows that arc-microcracks happen only at the interfaces between the particles and matrix, and then extend to the matrix. Composite strength is coincident with matrix failure. First, the three-phases model is used to determine the external strains of two-phases element. Then micromechanical stress field in the matrix is obtained. Based on the generalized thermodynamic force in damage process, the damage equivalent stress can be computed. As the damage equivalent stress is equal to the ultimate stress of the matrix, the failure stress of matrix in composites is given.