Effects of temperature and confining pressure on the mode I and mode II fracture toughness of cement mortar

被引：21
|
作者：
Ghanbari, Navid [1 ]
Hosseini, Mehdi [1 ]
Saghafiyazdi, Morteza [1 ]
机构：
[1] Imam Khomeini Int Univ, Qazvin 3414896818, Iran
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2019年 / 104卷
关键词：
Confining pressure; Temperature; Cement mortar; Fracture toughness; Mode I; Mode II; STRAIN-BASED CRITERIA; CRACK-GROWTH;
D O I：
10.1016/j.tafmec.2019.102361
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of temperature and confining pressure were investigated on the mode I and mode II fracture toughnesses of Cracked Chevron-Notched Brazilian Disc (CCNBD) cement mortar specimens. The specimens were tested at ambient temperature (20 degrees C), as well as 60, 100 and 150 degrees C to study the effects of temperature. Furthermore, CCNBD cement mortar specimens were tested under 0, 3, 5, 7, and 10 MPa to investigate the effect of confining pressure on fracture toughness. Cement mortar specimens were used for testing in this study. According to the results, both mode I and mode II fracture toughnesses of the cement mortar increased linearly with increasing the confining pressure. Mode I and mode H fracture toughnesses initially increased by increasing the temperature up to 60 degrees C but then decreased as the temperature was elevated to the 100-150 degrees C range.
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页数：8
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