疲劳强度

Laws of cyclic hardening and softening, transformation laws of strain amplitude, plastic amplitude, laws of cyclic creep caused by mean stress under stress control, Masing behavior of material, etc, are examined in detail.

通过不同环境温度下的简单拉伸试验和应力控制下的低周疲劳试验，找出了环境温度对应力控制下的疲劳行为和疲劳强度的影响。

In addition, the effect of sliding friction between gear teeth can not be neglected.

本文针对传统的船用齿轮在强度计算中不计船体变形及齿间摩擦力的问题，以沿船体纵向布置的渐开线料齿减速齿轮机构为研究对象，通过系统地分析、研究，推导出综合考虑船体变形及齿间摩擦的船用料齿轮齿面接触疲劳强度计算公式，以进一步完善船用齿轮的强度计算。

Strength is the ability of a metal to as tensile strength,bending strength,compressive strength,torsional strength,shear strength and fatigue strength.

强度对于金属而言的能力就可以说是拉伸强度，弯曲强度，抗压强度，扭转强度，剪切强度和抗疲劳强度。

Change tradition tee joint into abutment joint , resulting in clear increase of fatigue strength of welding line of oscillating axle of press and safety service life of press hence a worthwhile method for corresponding personnel .

文章提出了提高压力机的摇摆轴焊缝的疲劳强度的技术措施，即将传统的在光轴上的&T&形接头改为台阶轴上的对接接头，可显著提高压力机的摇摆轴焊缝的疲劳强度及压力机的安全使用寿命，此方法值得有关人员借鉴。

The characteristics of fatigue cracking, in rib to crossbeam joints, rib to deck plate joints and rib to rib joints, are understood by the analysis of the test results. The regression line and 95% confidence lower limit of △σ-N curves are given for these joints. Their available fatigue strength is suggested for fatigue design.

通过对试验结果的分析，了解了纵肋与横梁连接、纵肋与盖板连接和纵肋与纵肋连接的疲劳开裂特点，给出了这些连接细节△σ—N曲线的回归线和95%置信下限，提出了疲劳设计时可采用的疲劳强度。

According to the test data, the fatigue strength time-varying model with the deterioration of fatigue strength coefficient in S-N curve was put forward.

根据试验数据，提出S-N曲线中疲劳强度系数下降的疲劳强度时变模型。

The fatigue strength of duplex stainless steel welded jointing with longitudinal fillet welded gusset and with longitudinal flat side gusset welded on plate were evaluated by hot spot stress,and the hot spot stress S-N curves were obtained and compared with the nominal stress S-N curves.

针对双相不锈钢焊接结构的疲劳性能问题，通过试验对双相不锈钢纵向角接板焊接接头和侧面角接板焊接接头疲劳强度用热点应力进行了评定，做出了热点应力S N曲线并与名义应力疲劳评定进行了比较。

The fixation strength and pull-off strength of the screw-plate constructs were performed initially and after fatigue.

测定其即刻固定强度、抗疲劳强度和钢板螺钉的抗拉出强度。

We have little information on the fatigue strength of a compression plate in fixation of a fracture under weight-bearing.

通过模拟负重电测试验及疲劳强度计算，认为骨折失稳是导致钢板疲劳强度下降的内在原因。

To counter the case which worm gear lost efficacy of rotating screen barrel rice mill ,reliability design theory was applied to analyze it.

针对旋筛式碾米机蜗杆传动时有失效的情况，运用模糊可靠性设计理论对蜗轮的强度进行分析研究，找出了蜗轮接触疲劳强度可靠度不足而失效的原因，将蜗轮材料由铸铁改为铝铁青铜，提高了蜗轮—蜗杆接触强度可靠度和弯曲强度可靠度。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。