Evaluation of Tensile Strength of Brazilian Test under Solid and Ring Disks using Finite Element Analysis
Evaluation of Tensile Strength of Brazilian Test under Solid and Ring Disks using Finite Element Analysis
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DOI：
10.17576/jsm-2018-4702-05
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发表时间：
2018-04-01
期刊：
影响因子：
0.8
通讯作者：
Tsutsumi, Takashi
中科院分区：
文献类型：
--
作者：
Abdullah, Rini Asnida;Tsutsumi, Takashi
完整岩石材料抗拉强度的测定，间接法比直接法多。最常用的间接方法是巴西试验。试验过程中的应力和变形能力通过不同直径比的试样的几何形状反映出来。通过巴西试验，研究了砂岩在间接拉伸载荷作用下，不同直径比的实心圆盘和环形圆盘的几何形状对砂岩内部应力分布和变形的影响。然后，利用RS2软件中的有限元方法进行模拟，并深入了解巴西试验的行为。分析表明，直径比为0.1的环形圆盘的最大抗拉强度是实心圆盘的3倍。同时，随着环盘直径比的增大，其抗拉强度降低。数值模拟还成功地解释了巴西试验中实心圆盘加载盘附近的剪切破坏现象。在这项研究中使用的有限元分析已成功地使应力分布和变形行为的岩石在拉伸下进行了密切的研究。
The tensile strength of intact rock materials has been determined by indirect method more frequent than the direct method. The most commonly used indirect method is Brazilian test. Stress and deformability undergo during the test reflected by geometry shape of the samples with respect to the different diameter ratio. This study focuses on influence of geometry shape in solid and ring disk with different diameter ratio on the stress distribution and deformations within sandstone subjected to indirect tensile loading by Brazilian test. Then, the finite element method in RS2 software was utilised to simulate and gain in depth understanding the behaviour of Brazilian test. The analysis shown that the maximum tensile strength in a ring disk with diameter ratio of 0.1 is three times higher than in solid disk. Meanwhile, as the diameter ratio of ring disk increases, it produces lower tensile strength. The numerical simulation also has successfully illustrated the shear failure which observed near the loading platen of solid disk during Brazilian test. The finite element analysis utilised in this research has successfully enables the stress distribution and deformation behaviour of the rock under tension to be studied closely.