سامانه مدیریت نشریات علمی دانشگاه یزد

Jamali Zavareh, Saeed, Baghbanan, Alireza, Hashemolhosseini, Hamid, Haghgouei, Hadi. (1395). Effect of Micro-Structure on Fatigue Behavior of Intact Rocks under Completely Reversed Loading. کاوش‌نامه زبان و ادبیات فارسی, 6(ویژه نامه انگلیسی), 55-62.
Saeed Jamali Zavareh; Alireza Baghbanan; Hamid Hashemolhosseini; Hadi Haghgouei. "Effect of Micro-Structure on Fatigue Behavior of Intact Rocks under Completely Reversed Loading". کاوش‌نامه زبان و ادبیات فارسی, 6, ویژه نامه انگلیسی, 1395, 55-62.
Jamali Zavareh, Saeed, Baghbanan, Alireza, Hashemolhosseini, Hamid, Haghgouei, Hadi. (1395). 'Effect of Micro-Structure on Fatigue Behavior of Intact Rocks under Completely Reversed Loading', کاوش‌نامه زبان و ادبیات فارسی, 6(ویژه نامه انگلیسی), pp. 55-62.
Jamali Zavareh, Saeed, Baghbanan, Alireza, Hashemolhosseini, Hamid, Haghgouei, Hadi. Effect of Micro-Structure on Fatigue Behavior of Intact Rocks under Completely Reversed Loading. کاوش‌نامه زبان و ادبیات فارسی, 1395; 6(ویژه نامه انگلیسی): 55-62.

Effect of Micro-Structure on Fatigue Behavior of Intact Rocks under Completely Reversed Loading

روش های تحلیلی و عددی در مهندسی معدن
مقاله 24، دوره 6، ویژه نامه انگلیسی، بهمن 1395، صفحه 55-62    اصل مقاله (1.15 M)
نوع مقاله: مقاله پژوهشی
نویسندگان
Saeed Jamali Zavareh* 1؛ Alireza Baghbanan1؛ Hamid Hashemolhosseini2؛ Hadi Haghgouei1
1Dept. of Mining, Isfahan University of Technology, Iran
2Dept. of Civil, Isfahan University of Technology, Iran
چکیده
Rock formations and structures can be subjected to both static and dynamic loadings. Static loadings resulting from different sources such as gravity and tectonic forces and dynamic forces are intermittently transmitted via vibrations of the earth’s crust, through major earthquakes, rock bursts, rock blasting and drilling and also, traffic. Reaction of rocks to cyclic and repetitive stresses resulting from dynamic loads has been generally neglected with the exception of a few rather limited studies. In this study, , two crystalline quarry stones in Iran; (Natanz gabbro and Green onyx) and one non-crystalline rock (Asmari limestone) are used to evaluate the effect of micro-structure of intact rock on fatigue behavior. These rocks have different mineral compositions and formation conditions. A new apparatus based on rotating beam fatigue testing machine (R.R.Moore), which is commonly used for laboratory fatigue test in metals, is developed and fatigue behavior and existence of the endurance limit were evaluated for the mentioned rocks based on stress-life method. The obtained results in the variation of applied amplitude stress versus loading cycle number (S-N diagram) followed common relationship in other materials. In addition, the endurance limit is perceived for all tested rocks. The results also illustrated that the endurance limits for all types of tested rocks in this study are ranged between 0.4 and 0.6 of their tensile strengths. The endurance limit to tensile strength fraction of green onyx and Natanz gabbro were approximated in a higher value compared to the Asmari limestone with non-crystalline micro-structure.
کلیدواژه‌ها
Fatigue of rocks؛ Micro-structure of intact rocks؛ Stress – life method؛ Completely Reversed Loading؛ Endurance limit
عنوان مقاله [English]
Effect of Micro-Structure on Fatigue Behavior of Intact Rocks under Completely Reversed Loading
نویسندگان [English]
Saeed Jamali Zavareh1؛ Alireza Baghbanan1؛ Hamid Hashemolhosseini2؛ Hadi Haghgouei1
1Dept. of Mining, Isfahan University of Technology, Iran
2Dept. of Civil, Isfahan University of Technology, Iran
چکیده [English]
Rock formations and structures can be subjected to both static and dynamic loadings. Static loadings resulting from different sources such as gravity and tectonic forces and dynamic forces are intermittently transmitted via vibrations of the earth’s crust, through major earthquakes, rock bursts, rock blasting and drilling and also, traffic. Reaction of rocks to cyclic and repetitive stresses resulting from dynamic loads has been generally neglected with the exception of a few rather limited studies. In this study, , two crystalline quarry stones in Iran; (Natanz gabbro and Green onyx) and one non-crystalline rock (Asmari limestone) are used to evaluate the effect of micro-structure of intact rock on fatigue behavior. These rocks have different mineral compositions and formation conditions. A new apparatus based on rotating beam fatigue testing machine (R.R.Moore), which is commonly used for laboratory fatigue test in metals, is developed and fatigue behavior and existence of the endurance limit were evaluated for the mentioned rocks based on stress-life method. The obtained results in the variation of applied amplitude stress versus loading cycle number (S-N diagram) followed common relationship in other materials. In addition, the endurance limit is perceived for all tested rocks. The results also illustrated that the endurance limits for all types of tested rocks in this study are ranged between 0.4 and 0.6 of their tensile strengths. The endurance limit to tensile strength fraction of green onyx and Natanz gabbro were approximated in a higher value compared to the Asmari limestone with non-crystalline micro-structure.
کلیدواژه‌ها [English]
Fatigue of rocks, Micro-structure of intact rocks, Stress – life method, Completely Reversed Loading, Endurance limit
مراجع

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