国产超高压爆破片静载及疲劳寿命试验研究OA北大核心CSTPCD

The long-term operation reliability and replacement intervals of ultra-high ressure rupture discs are critical issues that are faced by many companies.Static and fatigue life tests are conducted on domestically developed ultra-high pressure rupture discs.The results show that both static and fatigue life of rupture discs decrease as the operating ratio increases.At an operating ratio of 0.98,the static life time is reduced to 65 minutes,and the number of fatigue cycles is limited to 62.Through microscopic analysis of the fracture surfaces,ductile fracture characteristics are revealed in static tests at high operating ratios,while extensive fatigue cracks are observed in fatigue tests.Considering factors that contribute to life reduction,the test data are fitted,and predictive curves for static and fatigue life suitable for engineering applications are proposed.It is discovered that changes in the operating ratio(above 0.86)have a minor impact on life;however,even slight fluctuations at lower operating ratios significantly affect the life.The evaluation method of dynamic life of ultra-high pressure rupture discs can provide reference for the analysis of replacement cycle and life of rupture discs.