Through analyzes the coal mine machine parts to have the endurance failure reason, the harm, proposed increases the feeder components fatigue life the measure. 通过分析煤矿机械零件产生疲劳断裂的原因、危害,提出了增加煤矿机械零件疲劳寿命的措施,对延长煤矿机械零件的寿命具有重要意义。
The endurance crack is apt to be produced in collar thread during drilling, which eventually results in the connection failure. 在钻井过程中,钻铤螺纹容易产生疲劳裂纹,最终导致连接失效。
When argillite formations at the lower part of intervals are drilled, critical bit weight and endurance failure factor of buckle formed by building assembly should be checked. ④钻遇下部井段泥板岩地层时,应对增斜钻具发生屈曲的临界钻压和疲劳破坏系数进行校核。
Influence of Hold Time on the Behaviour of Cyclic Endurance Failure in A Ni-Base Alloy 保载时间对GH220合金周期持久断裂行为的影响
Brief Analysis Coal Mine Machine Part Endurance Failure 煤矿机械零件的疲劳断裂
Analysis indicates that endurance failure by resonances plays vital role for mirror failure rather than static load by body force if manufacturing defects are of nonexistence. 结果表明,如制造无缺陷,由体力产生的静载荷不足以破坏镜体,对转镜产生较大破坏作用的是共振导致的疲劳破坏。
Effects of exercise training on the improvement of cardiac function and exercise endurance in patients with chronic heart failure 运动训练改善老年慢性心力衰竭患者的心功能和运动耐力
These alternating loads make the reverse curving in crank each spot and so on the complex alternate stresses, Extremely easily has the endurance failure in the existence stress concentration fillet place, Usually takes the strengthened measure to perform to solve. 这些交变载荷在曲轴的各个部位产生弯曲、扭转等复杂的交变应力,极易在存在应力集中的圆角处产生疲劳断裂,通常采取强化措施加以解决。
However, because of the main use of steel structure and susceptivity of steel structure especially the one that the welding steel structure to dynamic load, endurance failure of this structure will be aroused by the endurance of a long-period dynamic load. 但是,由于此种结构主要采用钢材,而钢结构特别是焊接钢结构对动荷载特别敏感,长期承受动荷载作用会引起结构的疲劳破坏。