Quantitative test on meso-damage characteristics of marble after different temperatures
Quantitative test on meso-damage characteristics of marble after different temperatures
复制标题
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Zhu Zhen-de
中科院分区：
文献类型：
--
作者：
Zhu Zhen-de
通过单轴压缩试验和细观损伤定量试验，研究了四川锦屏大理岩在20、100、300、450、600 ℃高温作用下的力学性能和细观损伤特征，结果表明，高温作用下大理岩的微裂纹主要有沿晶裂纹、穿晶裂纹和晶内裂纹3种，单轴压缩条件下，大理岩试样中微裂纹的几何参数符合广义极值分布，由于沿晶裂纹和穿晶裂纹的门槛温度在100 ℃左右，在100 ℃和更高温度下，大理岩试样的力学性能存在差异，在大理岩试样的破坏过程中，沿晶裂纹起主导作用。
Based on the uniaxial compression test and the quantitative meso-damage test,the mechanical properties and meso-damage characteristics of the Jinping marble in Sichuan Province after different high temperatures were studied.The temperature varied in the range of 20,100,300,450,600 ℃.The results show that there are three main microcracks,which are intergranular cracks,transgranular cracks and intracrystalline cracks,in marble specimens under uniaxial compression.The geometric parameters of the microcracks fit generalized extreme value distribution.There are the different mechanical properties under 100 ℃ and under higher temperatures because the threshold temperature of intergranular cracks and transgranular cracks is about 100 ℃.The intergranular cracks play a dominant role during the damge of marble samples.