裂纹几何尺寸是在结构的抗疲劳设计、疲劳断裂力学分析、断裂判据和疲劳断裂控制中非常重要的依据。
The crack size is crucial for structure fatigue design, fracture mechanics analysis, judgment criterion of fracture and fracture control.
计算结果表明，基于钢桥面铺装层带裂缝工作的事实，应用断裂力学方法预测钢桥面铺装层疲劳寿命是可行的。
The result indicates that fracture mechanics can be employed to forecast the fatigue life of the pavement on orthotropic steel bridge decks.
本文采用断裂力学方法来估算结构构件的疲劳寿命，这其中主要围绕裂纹扩展速率表达式展开研究。
Fracture mechanics is adopted to estimate the fatigue life of structural members, and among the rest, crack growth rate formula is studied.
疲劳寿命的计算采用断裂力学方法，建立疲劳裂纹扩展模型和失效模式的极限状态方程。
Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.
应用断裂力学理论分析了保证试验对陶瓷试件造成的损伤及其对疲劳强度的影响。
The effect of proof testing on the fatigue strength of ceramic specimens is analyzed by means of the fracture mechanics approach.
主要涉及的内容包含每个设备部件的应力、疲劳、热棘轮、断裂力学分析和内部构件流致振动分析以及试验验证等。
The design mainly involves the analysis of the stress, fatigue, thermal ratchet and fracture mechanics, the analysis of flow-induced vibration of the internals and the test verification.
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.
用工程断裂力学研究了非金属夹杂物尺寸对阀片疲劳寿命的影响。
An investigation has been made on the influence of the dimension of non-metallic inclusions on valve fatigue life according to engineering fracture mechanics.
此外，还运用断裂力学方法分析了材料有初始裂纹的管道在风荷载作用下的裂纹扩展及疲劳损伤。
In addition, the crack propagation and fatigue damage of CSP under wind load in the case of the material which have initial crack have been analyzed using fracture mechanics method.
讨论了恒幅及变幅载荷作用下，拉剪点焊接头的疲劳性能，并应用断裂力学对实验结果进行了分析和整理。
This paper discussed the fatigue strength of single-spot-welded joints under constant and variable amplitude loading. The fracture mechanics was also used to analyse the experimental results.
运用动力学和断裂力学方法，分析圆锥破碎机主轴疲劳折断的机理过程。
The mechanism and process of broken fatiguedly main shafts of all cone crushers should be analyzed with the help of dynamics and fracture mechanics.
基于二维线性断裂力学理论，提出了一种表面淬火齿轮的弯曲疲劳寿命预测方法，并开发了相应的计算程序。
A method for predicting the bending fatigue life of a surface quenched gear is proposed based on two-dimensional linear fracture mechanics and a computer program is developed.
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。
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.
以外白渡桥为例，详细介绍了一套综合传统疲劳分析和断裂力学的混合方法，并用以计算老钢桁梁桥剩余寿命。
With this method the remaining fatigue life and safety of old riveted truss bridge were calculated with Waibaidu bridge as an example.
最后，给出了概率断裂力学方法预测焊接钢梁在给定可靠度下疲劳裂纹扩展寿命的算例。
At last, adopting PFM to estimate fatigue crack growth life for welded steel beams under given reliability.
基于选定的路面力学模型，采用断裂力学中的疲劳裂缝扩展理论对路面反射裂缝的扩展规律进行分析。
Based on the pavement mechanics models, fatigue cracking theory of fracture mechanics was used to investigate the rule of reflection cracking.
本文用概率断裂力学的方法研究了海洋平台管节点的疲劳强度。
The paper deals with fatigue life of welded joints of offshore structures by using the method of probabilistic fracture mechanics.
本节将介绍结构断裂力学概念，礼炮裂纹的起始和生长机理。尤其是从焊接缺陷开始的疲劳。
This section will introduce the concept of Fracture Mechanics and initiation and growth mechanism of fatigue cracks, in particular, fatigue crack developed from welding defects.
本文采用概率断裂力学方法和可靠性分析方法，针对压力容器焊接接头的组织不均匀特点，研究了焊缝区疲劳失效概率模型。
The paper studies the fatigue failure probabilistic model of the weld zone in welded joint using probabilistic fracture mechanics and reliabilitistic analysis methods.
为开设断裂力学实验提供了一种预制疲劳裂纹的装置。
This device can offer the desired crack duc to fatigue for the experiment of fra...
应用概率断裂力学方法，对含初始裂纹体的金属材料(铝合金)构件的疲劳裂纹扩展寿命进行可靠性分析。
Applying probabilistic fracture mechanics approach (PFMA), the reliability analysis is carried out for helicopter metal material (aluminum alloy) structure having initial cracks.
疲劳裂纹萌生阶段在整个疲劳破坏过程中占有极为重要的地位，而萌生阶段的裂纹体损伤规律用长裂纹断裂力学方法是无法确定的。
Fatigue crack initiation is an important period in the whole fatigue life. The damage regularity of crack initial period cannot estimate with fracture mechanics which is used in large crack.
应用断裂力学理论分析了保证试验对陶瓷试件造成的损伤及其对疲劳强度的影响。
The effect of proof test on the fatigue strength and lifetime of soda lime glass specimens is studied.
超声疲劳不仅属于疲劳学和断裂力学的基础研究，而且其成果已应用于航空、航天等工业领域。
Besides scientific investigations for fatigue and fracture mechanics, ultrasonic fatigue is also used for industrial applications.
超声疲劳不仅属于疲劳学和断裂力学的基础研究，而且其成果已应用于航空、航天等工业领域。
Besides scientific investigations for fatigue and fracture mechanics, ultrasonic fatigue is also used for industrial applications.
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