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针对滚动功能部件在其使用过程中的磨损失效等将直接影响其服役性能的问题,为方便高效地获得滚动功能部件不同时间历程下的在线监测和离线状态数据,提出了一种基于全周期分段步加策略的极小子样滚动功能部件加速实验方法.将滚动功能部件沿轴线方向分成n+1个子段,从子段1开始在加载力Fi作用下以速度vi自子段i至子段n往复跑合zi次,建立了各分段的等效加载力、等效跑合速度、第i个子段单位长度上正常应力水平下总的服役时间Ti的计算模型,并搭建了滚动功能部件服役性能加速实验台.该加速实验方法可应用于细长轴类零件的服役性能和失效演变机理分析及其寿命和可靠性的预测评估.
Aiming at the problem that the wear and tear of the rolling functional parts will directly affect the service performance of the rolling functional parts in the course of its use, in order to obtain the on-line monitoring and off-line status data of the rolling functional parts under different time histories easily and efficiently, The step-by-step strategy of small subsize rolling function accelerates the experimental method. The rolling functional components are divided into n + 1 sub-sections along the axial direction, starting from sub-section 1 under the action of loading force Fi with velocity vi from sub-section i to sub-section n reciprocating run zi times, the equivalent load force of each segment, the equivalent running speed, the i-th sub-segment length of the unit under the normal stress level of the total service time Ti computing model and set up a rolling function components Service performance accelerated test bench.The accelerated test method can be applied to service performance and failure evolution mechanism analysis of slender shaft parts and predictive assessment of life expectancy and reliability.