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.

引用

页码：623 / 633

页数：10

共 32 条

[31] Awaji H., Sato S., Combined mode fracture toughness measurement by the disk test, Journal of Engineering Materials and Technologies, 100, pp. 175-182, (1978)
[32] Tohgo K., Otsuka A., Yuuki R., Fatigue crack growth of a mixed mode three-dimensional crack (1st Report, Analysis of stress intensity factors of mixed mode three-dimensional cracks based on the J-Integral concept), Transactions of the Japan Society of Mechanical Engineers, A, 52, 476, pp. 909-918, (1986)

← 1 2 3 4 →