叶片裂纹是疲劳裂纹，主要由交变应力引起。
They are fatigue cracks which is mainly caused by alternating stress.
而交变应力集中是疲劳破坏的一个关键因素。
The concentration of alternate stress is a key factor of fatigue destruction.
而且液相部分热交变应力小，液体温度基本稳定。
Thus hot alternate stresses is small in liquid part part, the liquid temperature is basic stable.
交变冰力引起的结构交变应力必将导致结构的局部疲劳损伤。
Alternating stress produced by alternating dynamic ice force evidently results in the partial fatigue failure.
在热交变应力的作用下，热疲劳是铸铁工件的主要失效形式之一。
Under act of the alternating thermal stress, thermal fatigue is one of theprimary invalidity forms of cast iron workpiece.
接触疲劳失效系指轴承工作表面受到交变应力的作用而产生失效。
Bearing contact fatigue failure of the working surface by means of alternating the role of stress arising from failure.
应用流式细胞术分析烟草细胞在交变应力作用下细胞周期的变化。
Flow cytometry was used to measure cell cycle parameters in tobacco cell suspensions acted by alternative stress.
螺纹部位承受高的交变应力，是导致螺纹联接螺纹失效的主要原因。
That the thread endures high alternate stress is the first cause of failure of thread joint.
冰激振动引起的交变应力，将会使海上石油钢结构发生疲劳与断裂玻坏。
The alternate stress stimulates vibration ice, makes the offshore petroleum steel construction fracture because of the fatigue factor.
部分预应力混凝土梁中的非预应力钢筋在反复运行荷载作用下承受交变应力。
The non—prestressed steel bars in ppc beams endure alternate stress under the repeated service loading.
由于重力作用在竖直于机组轴线方向上的压力分布不均匀，叶片上作用有交变应力。
The pressure distribution along the vertical direction is asymmetrical and cyclic stress acting on blades is found.
在环境介质中，钛制再沸器管板接头焊缝长期受交变应力的作用，导致管板焊缝开裂。
At the environment medium, the tubeplate joint welds of titanium reboiler were constantly effected by the alternation stress, welds cracking was occurred in the end.
材料疲劳断裂主要是因为试样在交变应力的作用下上产生滑移最后致使位错塞积而导致的。
The main reason for the fatigue fracture of material is that the specimens under action of alternating stress engender slip, finally resulting in dislocation stacking.
石油钻柱的失效80 %以上都为疲劳破坏，这与钻柱在弯曲和扭转组合下的交变应力有关。
The fatigue rupture made up 80 percent of the total petroleum drillstring failures, which is related to the flexural-torsional alternate stress acted on drillstring.
该曲线族可以转换成相同损伤量下交变应力与循环数关系的等效损伤线族，显示了损伤场全貌。
These curves are then transformed into equivalent damage curve family. Thus the full fatigue damage field is shown .
在变形加工过程中，由于加载、减载、模具承受交变应力作用，这就将引起开裂并发生重大破坏。
The dies are subject to alternating stresses due to loading and unloading during the deformation process and this causes crack initiation and eventual failure.
认为主要原因是螺栓在长期服役中受交变应力引起疲劳失效所致。过热蒸汽介质对疲劳失效有影响。
It revealed that alternating stress in long time cause the bolt fatigue failure, meanwhile the failure process was also effected by superheating steam.
混凝土腐蚀疲劳破坏是交变应力与腐蚀介质耦合作用的结果，对其研究目前国内外还仅出于理论探索阶段。
The Corrosive fatigue damage of concrete is the result of the compound action of alternating stress and corrosion medium, and the study about this has just been.
桥梁用预应力钢丝钢绞线都在高的交变应力状态下服役，加上海水、潮湿环境的影响，更加速其应力腐蚀的速率。
Prestressed steel wire and strand for bridge are used in the condition of high alternating stress with humidity atmosphere and sometime seawater atmosphere, which speed up the corrosion.
进一步增加调制周期，两调制层之间产生非共格界面，破坏了薄膜中的交变应力场，薄膜的硬度和弹性模量也随之降低。
Further increasing modulation period leads to the emerge of incoherent interface and the destroy of alternating stress field, accompanied by the decreased mechanical properties.
目的探讨不同交变应力作用下，大鼠翼外肌成肌细胞增殖活性的变化，为交变应力下翼外肌组织的改建提供必要的基础实验数据。
Objective To investigate the effects of time varied stress on the proliferation of myoblast in rats and provide the basic experimental data for the remodeling of tissue in functional orthopaedics.
目的探讨不同交变应力作用下，大鼠翼外肌成肌细胞增殖活性的变化，为交变应力下翼外肌组织的改建提供必要的基础实验数据。
Objective To investigate the effects of time varied stress on the shape-alteration of myoblast in rats and to provide a theoretic base to determine the mechanics of myoblast in orthodontic therapy.
基于蠕变理论提出了振动时效与循环蠕变在力学本质上的相关性，并对交变应力幅、温度和材料特性等共同影响因素进行了分析。
Based on the creep theory, the mechanical relationship of VSR and cyclic creep was discussed, and common factors such as stress amplitude, temperature and material properties were analyzed.
铁磁材料在交变磁场的作用下，产生的巴克·豪森效应，可作为无损检测材料残余应力的一种新方法。
Barkhausen effect is produced by ferromagnetic material under varying magnetic field, it can be used as a new method for nondestructive testing of residual stress.
凹模在使用过程中，由于交变载荷的作用，使碳化物的棱角处应力集中出现裂纹，最终导致凹模开裂。
The crack appears at the edge angle due to stress concentration caused by alternating load, which finally leads to the fissuring of die plate.
推导了交变载荷下弹塑性随机有限元的迭代格式，计算了局部多轴应力应变的随机响应。
The iterative formulas of elastoplastic stochastic finite element method (SFEM) under cyclic loading are deduced and the random responses of local multiaxial stress and strain are calculated.
本文基于小孔释放法测量残余应力的方法，通过实验研究了交变载荷对焊接残余应力场产生的影响。
Based on the blind-hole method, series of experiments are carried out to analyze the effect of alternate loading to the redistribution of residual stress.
本文基于小孔释放法测量残余应力的方法，通过实验研究了交变载荷对焊接残余应力场产生的影响。
Based on the blind-hole method, series of experiments are carried out to analyze the effect of alternate loading to the redistribution of residual stress.
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