the long-term life and low cycle fatigue life of low pressure turbine blade for an aero engine 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。
for low cycle fatigue life of steam turbine components with normal or a logarithmic normal distribution, a calculation method of the safe life expectation is given together with a practical example.
文中给出了低周疲劳寿命服从正态分布和对数正态分布时汽轮机部件低周疲劳安全寿命的计算方法和应用实例。
the individual cycle-strain hysteresis loops were recorded, and the cycling response and high temperature low cycle fatigue life were obtained.
记录了各自的循环应力—应变滞后环,得出了试样的循环响应特征和各试样的高温低周疲劳寿命。
as we know, it is very hard to get an accepted accuracy in high cycle fatigue life prediction by the local stress strain method.
以往用局部应力应变法计算结构高周疲劳寿命不好的主要原因是在损伤与寿命计算中没有考虑缺口应力梯度等因素的影响。
this paper presents the results of an investigation of the influence of hydrogen treatment on the low cycle fatigue life and fracture toughness of ti-6al-4v cast alloy.
本文研究了氢处理对铸造钛合金的低周疲劳寿命及断裂韧性的影响,发现经氢处理后铸造钛合金粗大的魏氏组织转变成细小的等轴组织,其应变低周疲劳寿命大大延长。
accounting for creep and stress relaxations long-term life and low cycle fatigue life prediction method for gas turbine engine hot section is established.
建立了考虑蠕变和应力松弛的航空发动机涡轮叶片等高温构件的持久寿命和低循环疲劳寿命预测方法。
the paper also presents the low cycle fatigue life and creep life「s quantificational method of steam turbine」s main stop valve and control valve, and applied examples.
提出了汽轮机主汽阀和调节阀阀壳低周疲劳寿命和蠕变寿命的定量设计方法,并给出了应用实例。
elastoplastic finite element analysis and low cycle fatigue life prediction of an engine combustor case were completed.
最后,提出了简便预测这类结构的高周疲劳寿命方法,且预测结果与试验结果吻合较好。
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。
based on this, the low cycle fatigue life experiment was done and it was concluded that the laser shock processing can greatly improve the low cycle fatigue life of ly2.
在此基础上设计进行了试件激光沖击处理前后的低循环疲劳寿命实验,得出激光沖击强化可以显着提高ly2航空铝合金试件的低循环疲劳寿命的结果。
the research was made on the low cycle fatigue life of ly2 by laser shock processing. according to the detonation wave theory and the yield strength theory, the shock parameters were calculated.
本文针对ly2航空铝合金材料,利用爆轰波理论、材料的屈服强度理论计算了激光沖击的参数范围。
underfill technology effectively enhances the flip-chip cycle fatigue life and reliability of packaging process.
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。
operational safety, creep life consumed as well as low cycle fatigue life consumption, caused by alternating stress during turbine starts and stops, are being exemined.
考核了其安全性和蠕变寿命损耗,以及在启停过程中由于交变应力而造成的低周疲劳寿命损耗。