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- HIGH CYCLE FATIGUE LIFE PREDICTION BY LOCAL STRESS-STRAIN METHOD 用局部应力应变法进行高周疲劳寿命预测的研究
- New Method for Prediction of High Cycle Fatigue Life 一种新的高周疲劳寿命估算方法
- Influence of Recrystallized Layer on High Cycle Fatigue Life of Directionally Solidified Superalloy 表面再结晶对定向凝固高温合金高周疲劳行为的影响
- high cycle fatigue life 高循环失效周期
- For the same material, the low cycle fatigue life in high temperature air is longer than that in simulated BWR and PWR primary environments. 对于同种材料,高温空气中的低周疲劳性能优于高温水中的低周疲劳性能;
- High Cycle Fatigue(HCF) failures of areo engine blades caused by vibration are very important for development and application of engine. 必须最大限度地降低航空发动机叶片高循环疲劳失效。
- Elastoplastic finite element analysis and low cycle fatigue life prediction of an engine combustor case were completed. 对某发动机燃烧室外套进行了弹塑性有限元分析和低循环疲劳寿命预测。
- Results showed that high stress concentration around the spot weld edge may be the determinable factor for initializing and propagating of the high cycle fatigue crack. 分析结果表明:接头搭接区内表面上焊点边缘处的应力集中是接头高周疲劳裂纹起裂和扩展的决定因素。
- The results show that low cycle fatigue life is reduced and cyclic stress is raised by torsional prestrain raising. 结果表明,扭转预应变降低低周疲劳寿命,循环应力随扭转预应变的增大而增大。
- The variance of the mechnical of 45# steel under high cycle fatigue has heen studied.The result shows:Under high cycle fatigue,cyclical softening of 45# steel is a fact. 通过研究45%23钢疲劳循环后材料的力学性能来反映高周疲劳产生的材料软化现象,取得了一些进展。实验结果与假设基本一致。
- Underfill technology effectively enhances the flip-chip cycle fatigue life and reliability of packaging process. 有机基板上的倒装芯片一般采用底部填充技术以提高其封装的可靠性。
- The microhardness on the surface of normalized 45 steel smooth sample was measured using micro Vickers under different cycle number during high cycle fatigue. 摘要应用显微硬度计对高周疲劳不同循环周次下正火45钢光滑圆试样进行了表面显微硬度测量。
- Unsteady flow in fan/compressor not only affects its gasdynamic performance, but also reliability, since high cycle fatigue, stall and flutter will cause serious machine damage. 风扇/压气机内的非定常流动不仅影响气动性能,而且影响可靠性,如高周疲劳、失速和颤振等,应加强研究。
- Additionally, The SW/B interaction is the main reason of turbine High Cycle Fatigue(HCF). A more deep understanding about SW/B interaction will attenuate the problem of HCF. 此外,激波/叶排干扰是存在该现象的涡轮所受高周交变力的主要原因,要解决这类涡轮的高周疲劳问题(HCF)必须深入研究激波/叶排干扰
- A method is outlined for making low cycle fatigue life prediction for engineering components subject to multiaxial loading. 介绍了一种预测受多轴交变载荷工程构件的低周疲劳寿命的方法。
- The long-term life and low cycle fatigue life of low pressure turbine blade for an aeroengine under real loading spectrum is analyzed by using this method. 用该方法对某型发动机低压涡轮工作叶片在实际飞行载荷谱作用下的持久寿命和低循环疲劳寿命进行了分析。
- The fatigue life is insensitive to the titanium alloying method.If alloys have the same titanium content, two kinds of alloys have similar low cycle fatigue life. 合金的疲劳寿命对加钛方式不敏感, 在相同钛含量下, 两种加钛方式的合金具有相近的低周疲劳寿命。
- High cycle fatigue fracture of the extension was proved by means of examination of metallurgical quality, heat treatment, fitting clearance as well as macro-and micro-aralysis of the fracture. 通过对断裂叶片的材质、热工艺、装配间隙的复查和断口的宏观、微观分析,证明叶片延伸段的断裂属于高周疲劳断裂;
- The test results of nonproportional low cycle fatigue under multiaxial loading of 316L stainless steel are used.The present multiaxial low cycle fatigue life prediction methods are discussed. 摘要利用对316L不锈钢多轴非比例加载低周疲劳的试验结果,对现有的多轴低周疲劳寿命估算方法进行讨论;
- ANISOTROPIC DAMAGE UNDER HIGH CYCLE FATIGUE 高周疲劳各向异性损伤问题研究