Experimental study of influences of pore number and pore size on mechanical properties of marble

ZHANG Chuang; TANG Jian-xin; TENG Jun-yang; LI Chen-lin .

doi:10.16285/j.rsm.2017.S2.006

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Experimental study of influences of pore number and pore size on mechanical properties of marble

更新时间：2026-06-25

- Experimental study of influences of pore number and pore size on mechanical properties of marble
- Vol. 38, Issue S2, Pages: 41-50(2017)
- 作者机构：
- 作者简介：
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- DOI：10.16285/j.rsm.2017.S2.006
  CLC： TU452
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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ZHANG Chuang, TANG Jian-xin, TENG Jun-yang, et al. Experimental study of influences of pore number and pore size on mechanical properties of marble[J]. 2017, 38(S2): 41-50.
DOI：

ZHANG Chuang, TANG Jian-xin, TENG Jun-yang, et al. Experimental study of influences of pore number and pore size on mechanical properties of marble[J]. 2017, 38(S2): 41-50. DOI： 10.16285/j.rsm.2017.S2.006.

摘要

为分析孔洞数量及孔径对大理岩力学特性的影响，对含不同孔洞数量及孔径的大理岩进行单轴压缩试验，并对破坏前后的试件进行CT扫描，研究其损伤裂纹空间分布特征。试验结果表明，孔洞数量及孔径对试件的强度参数、破坏形式及损伤程度等均有较大的影响，主要具体表现为（1）随着孔洞数量及孔径的增加，试件的弹性模量、峰值强度、起裂应力和起裂应力水平逐渐减小；（2）随着孔洞数量及孔径的增加，试件在破坏过程中的拉剪裂纹增多、远场裂纹减小，且在破坏后的破坏形式逐渐由拉剪破坏过渡到剪拉破坏，破坏后的损伤程度逐渐增加；（3）单轴压缩条件下的含孔试件，其破坏过程在试件的前后方向表现为由一方向另一方逐渐破坏，在试件的上下方向表现为由圆孔所在平面向上下两端逐渐破坏；（4）单轴压缩条件下的含孔岩样损伤分布在试件的前后方向上表现为由一方向另一方的逐渐减小，上下方向上则表现为由圆孔向上下两端逐渐减小，需注意的是由于损伤的叠加效应多孔试件在其上下方的最大损伤面并非位于圆孔处而是位于两圆孔的中间处。

Abstract

In order to analyze the influences of pore number and pore size on mechanical properties of marble

uniaxial compression tests are carried out on marble with different pore numbers and pore sizes; and with CT scanning of the specimens before and after destruction the characteristics of the spatial distribution of damage crack are studied. The results show that: (1) With increase of number or diameter of hole

elastic modulus

the peak strength

crack stress

and crack stress level of hole gradually decrease. (2) With increase of the number or diameter of hole

tensile crack and shear crack increase while the far field crack decrease in the process of specimen failure; and the failure mode of the specimen is gradually transited from tensile failure to shear failure after the specimen failure; meanwhile

damage degree increased gradually. (3) Containing hole specimen under the condition of uniaxial compression

the failure process in the direction of before and after showing from one party to the other gradually failure

and in the direction of up and down showing from hole to the up and down gradually failure. (4) Under the condition of uniaxial compression with hole sample

and the damage distribution in the direction of before and after is decreases from one party to the other

while in the direction of up and down is performed gradually decrease from the hole to the up and down but it’s important to note that due to the superimposed effect of injury the maximum damage surface of the porous specimen is not located at the round hole but at the center of the two circular holes.

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