还会形成穿透型裂纹，造成镀层下本体金属的疲劳或应力腐蚀裂纹。
Through-thickness cracking also can lead to fatigue or stress corrosion cracking of the base metal beneath the plating.
机翼显示出金属疲劳的迹象。
问题原来出在机身的金属疲劳。
就在几周前，飞机工程师才发现他们并没有完全了解金属疲劳——四月一日，西北航空公司812航班使用的波音737-300型客机在从凤凰城飞往萨克拉门托的途中发现在机身的上半部有一个五英尺的裂纹，不得不紧急迫降。
Over the past few weeks, aircraft engineers have found they do not know quite as much about metal fatigue as they thought.
让老旧飞机搁浅的一件事就是飞机铝构造因为金属疲劳产生的故障隐患。
One thing that does ground old aircraft is the impending failure of their aluminium structure from metal fatigue.
因此，一个张紧轮应持续时间更长，而被硬软建设能更好地抵御冲击，但将有更大的金属疲劳破坏的机会。
So a tight wheel should last longer and be stiffer while a softer build can resist impacts better but will have greater chance of metal fatigue failures.
通过疲劳断口的电镜扫描试验，证明防爆膜的疲劳破坏是由存在于金属内部的微裂纹和杂质所引起。
The photographs of the sweep electron microscope show that fatigue damage are caused mainly by microcracks and impurities of metal.
如果都把一个构件的最终断裂作为疲劳破坏的定义，则S - N曲线和裂纹扩展率曲线均是反映金属在疲劳载荷作用下的基本材料特性。
If the failure is defined as the final fracture of a component, then both S-N curves and crack growth rate curves reflect the fundamental material behavior under fatigue loading.
本文提出一种新的热疲劳损伤判据，用以评估金属材料的热疲劳性能。
In this paper a new criterion for thermal fatigue damage was proposed to evaluate the thermal fatigue performances of metallic materials.
他汽车上的零件可以经过几千英里的颠簸而不至于产生金属疲劳。
Parts in his automobile take thousands of miles of punishment without becoming tired.
金属疲劳是一个能量耗散过程，其中主要的能量耗散形式包括内耗热和储能。
Fatigue of metals is an energy dissipation process. The main energy dissipation includes the internal friction and the stored energy.
机翼显出有金属疲劳的现象。
钢结构长期在这种振动的影响下就会导致金属结构疲劳破坏；
It will cause metal structure to fatigue destruction if steel structure is influenced in the vibration for a long time.
最后，应用概率断裂力学方法(PFMA)，对含初始裂纹体的直升机金属材料(铝合金)构件的疲劳裂纹扩展寿命进行可靠性分析。
Finally, applying Probabilistic Fracture Mechanics Approach (PFMA), the reliability analysis is carried out for helicopter metal material (aluminum alloy) structure having initial cracks.
与传统的金属桩相比，纤维桩的强度、硬度、美学性能、抗腐蚀、抗疲劳性能以及生物相容性均比较优越。
Fiber post is superior to conventional metal post when strength, hardness, aesthetic performance, erosion-resistance, fatigue-resistance, and biocompatibility are considered.
这些工作主要讨论了金属泡沫材料的拉伸、压缩、能量吸收、动态冲击、失效准则、本构关系、蠕变、疲劳和断裂等力学性能。
They are mainly concerned with the tensile and compressive behavior, energy absorption, dynamic impact, failure criterion and constitutive relation, creep, fatigue and fracture of these materials.
懂金属学的人告诉我，当你反复弯曲一块金属的时候，它就开始疲劳了。
People with a better knowledge of metallurgy than I have, tell me that once you start to flex a piece of brass backwards and forwards, you start to fatigue it.
剧烈的颠簸飞行状况可能导致金属疲劳，甚至导致飞机失事，更不必说旅客感觉不舒适了。
Serious bumpy flight conditions may lead to material fatigue and even to aircraft failure, not to speak of passenger discomfort.
论述金属离子注入技术在改善材料的疲劳、耐磨性、 氧化等性能方面的应用。
The application of metal ion injection technology for improving metal fatigue resistance and erosion resistance are discussed.
设备的零部件和金属构件发生的损坏，80%是由于各种微观和宏观机械应力集中所导致的疲劳失效。
The fatigue invalidation made by the kind of microcosmic and macroscopical mechanical stress concentrate 80% resulted in equipment part and metal components damage.
设备寿命诊断主要研究设备部件在非稳态下的温度及热应力变化规律、金属材料的疲劳特性以及部件的寿命损耗。
Equipment life-span diagnoses mainly research the variation rules of unit part in unsteady temperature and thermal stress, fatigue characteristic of metals and life deterioration of equipments.
应用二维单侧容限系数公式，提出了一种测定金属材料疲劳裂纹扩展速率的小样本方法。
A small sample method for testing fatigue crack growth rate curve of steel was presented in this paper using a formula of two-dimensional one-side tolerance factor.
本文回顾了各种金属及合金在门坎区附近的疲劳裂纹扩展的机制和特征。
This paper presents a review of the characteristics and mechanisms of fatigue crack propagation at near-threshold range in various metals and alloys.
根据起重机钢丝绳失效主要是金属疲劳的原理，采用应力-强度干涉模型，对起重机钢丝绳进行了疲劳可靠性设计。
Since the main failure reason of the steel rope is the fatigue of the metal, the fatigue reliability design of the crane steel rope can be executed by means of stress-strength interference model.
持续的运动甚至是强烈的噪音产生的应力会导致疲劳、不断弯曲的金属出现的裂缝和破损。
The stresses produced by continual movement, and even intense noise, cause fatigue, the cracking and breaking that occurs in metals under constant flexure.
本文回顾了各种金属及合金在门坎区附近的疲劳裂纹扩展的机制和特征。
This paper presents a review of the characteristics and mechanisms of fatigue crack propagation(FCP)at near-threshold range in various metals and alloys.
分析了某些国产同类及金属轴套抗疲劳性能低的原因，并对其改进途径及烧结机理进行了探讨。
The reason for the inferior fatigue strength of some home made bimetal bushes, improvement approach and sintering mechanism were discussed.
分析了某些国产同类及金属轴套抗疲劳性能低的原因，并对其改进途径及烧结机理进行了探讨。
The reason for the inferior fatigue strength of some home made bimetal bushes, improvement approach and sintering mechanism were discussed.
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