Study on Fatigue Life of Plow Bit under Different Planning Parameters

• Дата: 2014
• Автори: Zhang, Q., Xu, M.J., Hu, N.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут проблем міцності ім. Г.С. Писаренко НАН України 2014
• Назва видання: Проблемы прочности
• Теми: Научно-технический раздел
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/112709
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Study on Fatigue Life of Plow Bit under Different Planning Parameters / Q. Zhang, M.J. Xu, N. Hu // Проблемы прочности. — 2014. — № 2. — С. 132-140. — Бібліогр.: 11 назв. — англ.

In order to study the fatigue life of plow bit under different planning parameters, the process of plow bit cutting coal seam is simulated based on a solid model. The variation of the stress in the joint between the blade and carbide head is obtained by simulating the planning process with different planning parameters of the weak joint (cutting angle, plow thickness and plow spacing). The fatigue life of the plow bit is predicted using the improved rain-flow method and the Miner linear accumulated fatigue damage model. According to the experiment on plow bit life, the stress amplitude and accumulated damage in one stroke are the least at the cutting angle of 80C, with the number of working strokes and working hours of a damaged plow bit reaching the maximum. The thicker the plow bit is, the larger is the resistance and higher is the damage. In addition, a smaller plow spacing implies a better planning ability and a smaller damage. The experimental data are consistent with the results of the theoretical analysis.