Modeling and numerical analysis of granite rock specimen under mechanical loading and fire |
| |
Authors: | Luc Leroy Ngueyep Mambou Joseph Ndop Jean-Marie Bienvenu Ndjaka |
| |
Affiliation: | Laboratory of Sciences Material, Department of Physics, Faculty of Science, University of Yaoundé, Yaoundé, Cameroon |
| |
Abstract: | The effect of ISO 834 fire on the mechanical properties of granite rock specimen submitted to uniaxial loading is numerically investigated. Based on Newton's second law, the rate-equation model of granite rock specimen under mechanical load and fire is established. The effect of heat treatment on the mechanical performance of granite is analyzed at the center and the ends of specimen. At the free end of granite rock specimen, it is shown that from 20 C to 500 C, the internal stress and internal strain are weak; whereas above 500 C, they start to increase rapidly, announcing the imminent collapse. At the center of specimen, the analysis of the internal stress and internal strain reveals that the fi re reduces the mechanical performance of granite signi fi cantly. Moreover, it is found that after 3 min of exposure to fi re,the mechanical energy necessary to fragment the granite can be reduced up to 80%. |
| |
Keywords: | Granite rock specimen High temperature Internal stress Internal strain ISO 834 fire |
本文献已被 CNKI 万方数据 等数据库收录! |
|