A Meso-Micromechanics Approach to the Strength Criteria for Particle-Reinforced Radiation-Shielding Materials

HE Zheng; WANG Xu-wei; Djimedo Kondo

doi:10.3879/j.issn.1000-0887.2015.12.009

Volume 36 Issue 12

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HE Zheng, WANG Xu-wei, Djimedo Kondo. A Meso-Micromechanics Approach to the Strength Criteria for Particle-Reinforced Radiation-Shielding Materials[J]. Applied Mathematics and Mechanics, 2015, 36(12): 1306-1314. doi: 10.3879/j.issn.1000-0887.2015.12.009

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A Meso-Micromechanics Approach to the Strength Criteria for Particle-Reinforced Radiation-Shielding Materials

doi: 10.3879/j.issn.1000-0887.2015.12.009

¹State Nuclear Hua Qing(Beijing) Nuclear Power Technology R & D Centre Co., Ltd., Beijing 102209, P.R.China;²Pierre and Marie Curie University, Paris 75005, France

Funds: The National Science and Technology Major Project of China（2012ZX06004-012）

Received Date: 2015-01-19
Rev Recd Date: 2015-09-12
Publish Date: 2015-12-15

Abstract

Abstract

Based on the micromechanics homogenization theory, the macroscopic mechanical strength properties of radiation-shielding composite materials were investigated according to their meso-microstructures and local physical properties at micro-scale. Ductile micro-porous materials reinforced with rigid particles were studied. The strength criteria in view of the impacts of porosity and particle volume fraction were derived for metal matrix composites containing hard inclusions as well as other engineering composite materials (polymer matrix composites or geomaterials). Under the framework of the plastic limit analysis approach, the velocity field jump at meso-scale was introduced to describe the interfacial mechanical behavior between the matrix phase and the inclusion phase, and the rigid core unit cell model was applied in solution. In the end the velocity field in which the interfacial velocity equalled 0 was chosen for calculation, and the effects of the interfacial properties on the material strengths were discussed. The results show the effectiveness of the proposed multi-scale analysis framework.
- radiation shielding,
- particle-reinforced composite,
- void,
- multi-scale,
- strength,
- plastic limit

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