A Study of the Measurement of Mixed Mode Fracture Toughness of Sandstones Under Various Thermal Conditions by Four-Point Bending Experiments

被引：0
|
作者：
Wang C.-L. [1 ]
Chang Y.-Y. [1 ]
Shih B.-R. [1 ]
Kuo C.-C. [2 ]
机构：
[1] Department of Resources Engineering, National Cheng Kung University, Tainan
[2] Department of Civil Engineering, National Taiwan University, Taipei
来源：
Journal of the Chinese Institute of Civil and Hydraulic Engineering | 2019年 / 31卷 / 07期
关键词：
Four-point bending; Fracture toughness; Sandstones; Temperature;
D O I：
10.6652/JoCICHE.201911_31(7).0003
中图分类号：
学科分类号：
摘要：
This study proposes a single edge-cracked bending specimen under four-point bending configuration to measure the mixed-mode fracture toughness of rocks. The testing materials are sandstones. This study arranges the experimental setups of four-point bending tests for measurements of modes I + II fracture toughness. There are five different loading conditions for the mode I + II fracture toughness. These loading conditions are one mode I, three different modes I + II and one mode II. This study considers three thermal conditions: 25°C, 300°C, and 600°C. Mixed Modes fracture toughness for I + II are calculated. One observes that the mode I + II fracture toughnesses in 25°C condition are much higher than those in 300°C and 600°C conditions. Therefore, this study effectively utilizes a simple four-pointbending test to measure the mixed-mode fracture toughness of sandstones. © 2019, Chinese Institute of Civil and Hydraulic Engineering. All right reserved.
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页码：623 / 633
页数：10
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