The advantages and disadvantages of the fatigue damage cumulative rules are discussed.
比较各种疲劳损伤累积理论计算方法的优缺点。
The fatigue damage cumulative rule plays a key role on the structure design against fatigue.
疲劳累积损伤分布规律是结构疲劳可靠性分析与设计的关键内容之一。
Fatigue damage cumulative rule after calendar corrosive environment is crucial for determining calendar life of aircraft structure.
这些曲线是确定受腐蚀金属机件或构件疲劳日历寿命的依据。
But the common linear fatigue damage cumulative rule neglects the fatigue damage which is brought by the high frequency and low stress.
一般的线性损伤累积理论忽略了高频率低疲劳应力所引起的构件疲劳损伤，致使预测结果与实际寿命相差很大。
It also controls genes that protect cells from highly reactive oxygen radicals - molecules often thought to drive human ageing through the cumulative damage they wreak on DNA.
它还控制基因保护细胞不受高活性氧自由基这种被认为通过其在DNA上造成的累积损害导致人衰老的分子的侵害。
Such high levels suggest the brains of autistic children are exposed to a lot of oxidative stress, something that would probably cause cumulative damage.
这样高的含量表明，这些患病孩子的脑组织已经暴露在了高氧化压力下，有可能会造成累积的损伤。
As with sugar and artificial sweeteners the damage is cumulative: the longer you consume these fats, the greater the damage.
跟糖和人工甜味剂一样，它对人体的损害是累积的：你越长期吃这些脂肪，它对你的损害越大。
Repeated or continuous exposure to loud noise can cause gradual and cumulative damage.
反复或持续暴露在噪声中，可能会逐步造成积累性损伤。
The cumulative effect of the sun's rays causes a multitude of damage to skin, but it's never too late to start protecting skin from the sun.
日积月累的日晒会对皮肤造成严重损害，但是什么时候开始让皮肤避免日晒都不晚。
A longer, nationwide cleanup is urgent or the cumulative costs - in health, lost production and environmental damage - will be huge.
一个长期的、全国性的清理活动才是急需的，或者说是一种积累成本；否则在卫生、生产损失和环境破坏方面，将会是个天文数字。
The experimental results showed that weld metal had enough plastic deformation capacity, and its damage value was linear with the cumulative plastic strain.
试验结果表明，焊缝金属具有比较好的塑性变形能力，焊缝的损伤值与材料的累积塑性应变呈线性关系。
Based on the fatigue cumulative damage models, a damage evolution equation for flexural fatigue of SFRPC slabs is set up.
结合原有的混凝土疲劳损伤模型，建立了预应力钢纤维混凝土板的疲劳损伤演变方程。
Fatigue reliability interference model is established based on fuzzy cumulative damage of components, then general formula and simulation methods of fuzzy reliability estimation are derived.
建立了基于模糊累积损伤的构件疲劳可靠性干涉模型，导出了模糊可靠度评定的一般公式和仿真方法。
From the curves we can see that most of the experiment results are above the linear cumulative damage curve, it indicates that the steel P91 is negative interaction under the condition of this thesis.
由该图可以看出，绝大多数试验点落在线性累积损伤线上侧，表明在本文试验条件下，P91钢母材和焊材蠕变疲劳交互作用均表现为负交互作用。
The main classic fatigue cumulative damage theories and the representative definitions of damage variable have been introduced briefly.
简要介绍了经典的疲劳累积损伤理论和几个典型的损伤变量定义式。
According to the linear cumulative damage theory, a method for estimating life for welding structure of farm machinery acted under load spectrum is given.
本文根据线性累积损伤理论，给出了农机焊接件在谱载荷作用下的寿命估算方法。
The linear fatigue of the jacket structure was evaluated by using wave spectrum analysis theory and theory of linear cumulative damage.
采用随机波浪谱和线性疲劳累积损伤理论对导管架式海洋平台在波浪荷载作用下的疲劳可靠性进行研究。
The results show that the cumulative damage of propellants under the different stress levels agrees with linear rule.
结果表明，在不同应力水平下，推进剂的累积损伤基本符合线性累积损伤规律。
Therefore, the distribution configuration of the fatigue damage threshold is the same as the distribution configuration of lineal cumulative damage.
因此，新定义的疲劳损伤阀值与线性累积损伤之间在分布形态上是一致的。
Based on the double control damage criterion and index of the linear function of the maximum deformation and cumulative hysteretic energy, the collapse of the SDOF structures is analysed.
基于最大变形和累积耗能线性组合的双重破坏准则及破坏指标，对单自由度结构进行了倒塌分析。
Markov chain models of cumulative damage have been provided a comprehensive descriptions of cumulative damage processes.
业已证明，累积损伤的马尔可夫链模型对累积损伤过程提供了综合的描述。
Finally, the methods for calculating fatigue life based on fracture mechanics for welded node and cumulative damage theory for bolted sphere node respectively have been presented.
本文在大量实验的基础上提出了对焊接节点采用断裂力学的方法和对螺栓球节点应用累积损伤理论估算它们疲劳寿命的计算方法。
A cumulative damage model is proposed, which can be used to consider the influence of in plane bi-axial stresses and mean stress on the fatigue behavior of unidirectional laminates.
推荐了一种应变损伤累积模型，能够考虑单向板面内多轴应力和平均应力的影响。
But they need to be set against the fact - not the mere possibility - that high unemployment is inflicting tremendous cumulative damage as we speak.
然而，需要将这些风险放在这种事实——不仅仅是可能性，这样的背景下考虑。这种事实是，就在我们还在高谈阔论时，高的失业率还在制造巨大的累积性破坏。
In addition, it is proved that the lineal cumulative damage also observes the normal distribution by means of statistical testing.
另外，通过统计检验，验证线性累积损伤也服从正态分布。
In this dissertation, the theory which is known of concrete structure fatigue cumulative damage and damage detection is narrated.
本文阐述了已有的混凝土结构疲劳累积损伤理论和疲劳损伤识别原理。
By using the nonlinear cumulative fatigue damage model considering the influence of the fatigue limit and the cyclic stress amplitude, the remaining life formula of the.
获得了用电阻变化测量疲劳损伤的公式，应用计及疲劳极限和循环应力幅影响的非线性累积疲劳损伤模型，给出了金属材料疲劳损伤的剩余寿命预测公式。
The cumulative damage of the steel structure occurred by overload, fatigue and other reasons in service may deteriorate the safety of the structure seriously.
钢结构在服役过程中，因超载、疲劳等原因会引起损伤累积，极大地影响了结构的安全使用。
The cumulative damage of the steel structure occurred by overload, fatigue and other reasons in service may deteriorate the safety of the structure seriously.
钢结构在服役过程中，因超载、疲劳等原因会引起损伤累积，极大地影响了结构的安全使用。
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