疲劳裂纹

车轮铸钢热疲劳裂纹损伤行为研究

Study on Characteristic of Thermal Fatigue Cracking Damage of Wheel Casting Steel

高强度钢的疲劳裂纹门槛值实验研究

Experimental Research on the Threshold Value of Fatigue Cracking of High Strength Steel

含铈高阻尼Zn－Al合金的疲劳裂纹扩展

Fatigue Crack Growth of the High Damping Zn-Al Alloy Containing Trace Ce

Ti单晶及多晶与孪晶相关的疲劳裂纹萌生

Twin dependent fatigue crack initiation in Ti monocrystals and polycrystals

Co基高温合金疲劳裂纹的修复

Fatigue crack healing of Co-base superalloy

不同应力比下SiCp/Al复合材料疲劳裂纹扩展行为

Fatigue Crack Growth Behavior of SiC_p / Al Composite Under Different Stress Radio

一个普遍的疲劳裂纹扩展公式&确定ΔK（th）的新方法

A Generalized Formula for Fatigue Crack Propagation , - A New Method for Determining Δ Kth

寻求疲劳裂纹长度a与疲劳周次N的关系式是金属疲劳研究的一个重要课题。

It is an important subject of metal fatigue research to find out the formula of fatigue crack length a and cycles N.

缺口疲劳裂纹形成的J积分分析

J-integral analysis for initiation of notch fatigue crack

疲劳裂纹扩展速率（da）/（dN）的超声瑞利波测量

Measurement of Fatigue Crack Propagation Rate da / dN by Using Ultrasonic Rayleigh Waves

珠光体组织的疲劳裂纹扩展方式可分为A，B，C三种类型。A型为裂纹同时横切多层铁素体片和渗碳体片而扩展；

Observations were demonstrated of 3 different types of the fatigue crack propagation of pearlitic structure : type A & the crack intersects the multiple ferrites and cementites simultaneously ;

给出了用△J积分作为在弹塑性条件下疲劳裂纹扩展主要控制参数的表达式。

The J-integral expression as a main control parameter of fatigue crack growth under elasto-plastic condition is presented .

在不同疲劳裂纹扩展阶段，电解加钛和熔配加钛对扩展速率da／dN的影响有所不同。

The effects of the two titanium alloying methods on fatigue crack growth rate are different in different test procedure .

铸造Ni3Al基合金疲劳裂纹扩展的电镜断口观察

Fractographic observation of fatigue crack growth in cast ni_3 Al-based alloys

利用SWT参数法可以预测微动疲劳裂纹萌生寿命。

SWT parameter is helpful to predict the crack initiation life of fretting fatigue .

Ti3Al基金属间化合物的疲劳裂纹扩展与断裂

Fatigue Crack Growth and Fracture of Intermetallic Compound Based Ti_3Al

根据Paris疲劳裂纹扩展规律，对拉伸和纯弯曲疲劳载荷下表面裂纹扩展进行了数值模拟。

Fatigue crack growth of surface cracks in tension and bending plates is investigated with numerical simulation technique based on the Paris law of fatigue crack growth rate .

研究结果表明，AE参数与疲劳裂纹状态存在一定的对应关系，可用AE参数表征裂纹的状态。

The results show that the AE parameters and fatigue cracks have a coincidence relation and that the parameters can represent the state of crack .

TiB2颗粒增强锌基合金中短、长疲劳裂纹扩展行为

The Propagation Behavior of Short and Long Fatigue Crack in TiB_2 Particulate Reinforced Zn ( ZA-8 ) Alloy

然后根据断裂脱粘准则，借助描述疲劳裂纹扩展的Paris公式，得到了脱粘界面疲劳裂纹扩展速率、扩展长度以及脱粘界面上摩擦系数与循环加载次数的关系；

Then , according to the debonding criterion and the Paris formula , the relationship among the interfacial debonding rate , debonding length , coefficient of friction and the number of cyclic loading is obtained .

舰用907A钢结构高频疲劳裂纹扩展试验研究

Experimental research on fatigue crack growth rate of 907A steel

40Cr钢低周冲击疲劳裂纹扩展行为

Study on low-cycle impact fatigue crack growth behavior

对已超期服役且中度球化的焦炭塔20g材质在常温下的疲劳裂纹扩展速率da/dN进行了试验研究。

Fatigue crack propagation rate on normal temperature for 20 g steel that has served a coke tower over its design life was studied .

由于热点应力处是疲劳裂纹出现的位置，因此K节点疲劳断裂过程是要受到几何参数影响的。

As the location of the hot spot stress is the position of the surface crack initiation , the process of the fatigue and fracture failure of a tubular K-joint is thus influ - enced by the geometrical parameters of this K-joint .

最后给出了系统用于LC9铝合金腐蚀疲劳裂纹扩展门坎试验的结果。

Finally , the results of corrosion fatigue threshold testing of LC_9 aluminium using this system have boen given .

提出疲劳裂纹尖端塑性核半径门槛值Rth的概念及计算方法，Rth是材料性质。

In this paper , a concept for the radius of plastic core at the top of a fatigue crack is raised .

得到了疲劳裂纹扩展过程中的AE计数率、能量变化率、裂纹扩展率与应力强度因子的关系，通过这些关系式可预测叶片的疲劳寿命。

The correlations of the crack growth rates , AE count rates and AE energy changed rates versus the stress intensity factor ( SIF ) range were obtained . The fatigue life can be predicted by the correlations .

当前迫切需要了解840D车轮辐板孔疲劳裂纹的成因及继续使用的安全性问题。

So it has become imperious to clarify the cause of the fatigue crack of 840D wheel for freight car and the safety being used sequentially .

研究了不同腐蚀介质中及加载频率下X60管线钢的腐蚀疲劳裂纹扩展特性。

The characteristics of corrosion fatigue crack propagation of X60 pipe steel at different loading frequencies and in different corrosion media were studied .

本文将疲劳裂纹扩展速率发生转折的温度定义为疲劳裂纹扩展的韧脆转化温度FDBTT。

We defined the transition of FCGR as a fatigue ductile-brittle transition temperature ( FDBTT ) .