| 1. | Alternating strain amplitude
更迭应变幅度 |
| 2. | Half - life cyclic hysteresis energy decreases with the lowering of strain amplitude
这与css曲线和coffinmanson曲线的双线性特征具有相似的规律。 |
| 3. | When strain amplitude is lager than 0 . 5 % , it is better to employ the fatigue data of 3 / 10 life section ; as to strain amplitude lower than 0
5时，采用3 10寿命阶段的疲劳特性参数预测结果较符合实验值；但当应变幅小于0 |
| 4. | The second stage is a cyclic softening course , and what ' s more , the greater the strain amplitude , the greater the trend of softening
在所有试验条件下合金的疲劳硬化阶段都很短暂，疲劳寿命的极大部分是消耗在缓慢的循环软化阶段。 |
| 5. | The results indicate that the relationship between the saturated stress ( , . ) and the plastic strain amplitude ( sp ) both at room temperature and 400 can be expressed by a power law relation s = ksepns
结果表明，无论在室温还是在400 ，循环饱和应力， 、随塑性应变幅二，的变化满足乘幕关系ct 、一k “二， ” ‘ 。 |
| 6. | Drawing on a multifunctional internal friction instrument and dma , we tested the damping capacity of all the heat treated samples completely , and then got the damping - frequency spectrum , temperature spectrum and strain amplitude spectrum
然后，在多功能内耗仪和dma上对各热处理态试样的阻尼性能进行了全面测试，获得了内耗频率谱、温度谱和振幅效应谱。 |
| 7. | In addition , the cyclic softening under the strain amplitude less than 0 . 8 % can be explained by " grain - rotation induced cyclic softening " , and the cyclic hardening in the higher strain amplitude was attributed to twinning
在低应变幅区，合金在室温下的低周疲劳性能明显优于在400下的低周疲劳性能。但随着应变幅的增加，室温和400下合金的疲劳寿命趋于接近。 |
| 8. | The oscillation of fatigue factors have much effect on small strain amplitude fatigue life , and the less the strain amplitude , the less the effect . as for notched specimen , the fatigue life prediction using fatigue factors of half - life section is the smallest
5时，采用7 10寿命阶段的疲劳特性参数预测结果与实测值的一致性更好；对于缺口疲劳试样，则采用半寿命阶段的疲劳参数的预测结果为最小。 |
| 9. | We can see bilinear behavior from the relation - ? . diagram of fatigue life and total cyclic hysteresis energy as well as the fatigue life and half - life cyclic hysteresis energy . the divergent points both reside at the strain amplitude of 0
根据合金的循环硬化和软化行为，采用分段累积的方法计算材料的总滞?能比直接用半寿命滞?能乘以循环数得到的结果更符合实测值，而用疲劳特性参数计算总滞?能误差较大。 |
| 10. | Fatigue test indicates that strain multiplier have not been damaged for fatigue in the service life of fatigue life gage , fatigue response of fatigue life gage can be derived from the strain amplitude equal to specimen strain multiplied by amplification coefficient of strain multiplier
疲劳实验研究表明,在疲劳寿命计工作寿命内,应变倍增器无疲劳破坏情况,疲劳寿命计疲劳响应可由静载标定放大倍数乘试件表面应变后所对应的等幅应变值得到。 |
