裂纹尖端张开位移

C时其断裂参量特征值裂纹尖端张开位移符合三参数威布尔分布，并对材料力学性能进行分析；

Statistical analysis indicates that crack tip opening displacement of fracture parameter eigenvalue at - 78 ? C obey three parametric Weibull distribution ;

通过计算得到三点弯曲试样的动态裂纹尖端张开位移COD以及动态裂纹扩展量Δa，在此基础上得到裂纹动态起裂点。

Dynamic crack tip open displacement COD and a crack extension Δ a for three point bending specimen are obtained by calculating .

在此基础上，用柔度法测量了裂纹尖端张开位移（CTOD）试验用大尺寸SE（B）试样预制疲劳裂纹的长度。

On the basis of above investigation , fatigue crack length of bigger three-point specimen for CTOD test with compliance method were preformed .

基于Irwin假设的裂纹尖端张开位移的修正计算

The Correction Formula of Crack OPening Displacement Based on Irwin Hypothesis

温度对结构钢材裂纹尖端张开位移（CTOD）的影响分析

Influence of low temperature on crack tip opening displacement ( ctod ) of structural steel

裂纹尖端张开位移（CTOD）是材料断裂分析的重要判据指标。

Index ; Crack tip opening displacement ( CTOD ) is important criterion in fracture analysis .

介绍了裂纹尖端张开位移的含义，CTOD试验所用的主要设备及试验过程。

It is introduced the meanings of CTOD , the main equipment used by CTOD test and its test process .

采用两种不同热处理制度获得不同组织状态的材料，采用裂纹尖端张开位移（COD）试验及Hopkinson压杆试验方法研究了温度及加载速率对30A钢断裂韧度的影响。

The effects of temperature and loading rate on fracture toughness of 30A steel were studied by crack opening displacement ( COD ) and Hopkinson compression bar experimental method .

采用裂纹尖端张开位移（COD）实验及Hopkinson压杆实验技术研究了30A钢在不同加载速率下的断裂韧性特征；

The fracture characteristics of 30A steel at different loading rates have been investigated by crack tip opening displacement ( COD ) experiment and Hopkinson compression bar experimental technique .

研究应用裂纹尖端张开位移（CTOD）试验和冲击韧性试验结果，建立以断裂吸收功为介质的CTOD与冲击韧性的关系。

A certain relationship between Crack Tip Open Displacement ( CTOD ) and impact energy is established in this paper by taking the fracture absorbing energy as the medium .

利用试验研究和数值分析方法，对模拟焊接接头三点弯曲试样不同强度组配对裂纹尖端张开位移（CTOD）的影响进行了研究。

Combining experimental and numerical simulation methods , the effects of weld-joint strength matching on the crack tip opening displacement ( CTOD ) of three point bending specimen are investigated .

在对D-M模型研究的基础上，给出了D-M模型塑性区尺寸的计算方法，并利用D-M模型对原裂纹尖端张开位移COD公式进行了推导。

Gives the calculate method of plastic zone size of D-M model based on researching D-M model , and derivates the COD calculation of crack tip by D-M model .

根据ISO标准（BS7448），以裂纹尖端张开位移（CTOD）作为断裂韧度参量，测定了管线钢焊接接头0℃时的断裂韧度。

According to the ISO standard BS7448 , the fracture toughness of the welded joints were determined with the crack tip opening displacement ( CTOD ) as parameter at the temperature of0 ℃ .

本文以裂纹尖端张开位移（CTOD）为指标试验研究了钢结构低温断裂行为，并提出了基于CTOD指标的钢结构防脆断设计方法。

This paper experimented with the fracture behavior of steel structures at low temperature with the criteria of crack tip opening displacement ( CTOD ), and proposed a design method for the resistance of fracture for steel structure .

分析了BurdekinCOD设计曲线的不足点，建立了由EPRI工程计算方法求原裂纹尖端张开位移的转换公式，藉以考查Burdekin设计曲线的保守程度。

In this paper , the shortcomings in Burdekin COD design curve are analysed and the formula of transformation derived from EPRI 's engineering computation method for obtaining the original crack tip opening displacement is established .

采用裂纹尖端张开位移对焊接接头进行断裂韧性测试结果表明：在零下20o焊缝处的CTOD均值为1.39，而母材处的CTOD均值为0.82，且都大于0.15。

Testing the fracture toughness of welded joints with crack tip opening displacement and the test results show that : the average CTOD of weld department at minus 20 ° is 1.39 , while the average CTOD of base metal is 0.82 .

裂纹尖端张开位移试验在导管架建造中的应用

Application of Crack Tip Opening Displacement Test in Jacket Fabrication

用裂纹尖端张开位移法评价焊接接头韧性

To Evaluate the Toughness of Welded Jointer with Crack Tip Open Displacement Method

中美两国裂纹尖端张开位移测试方法标准的比较和评价

Comparsion and Appraisement of Test Method for Crack-Tip Opening Displacement ( CTOD ) of China-America

用激光散斑法测量裂纹尖端张开位移及应力强度因子

Measurement for the crack tip opening displacements and stress intensity factors by a laser speckle method

基于局部法由示波冲击试验预测裂纹尖端张开位移

Prediction of Crack Tip Opening Displacement ( CTOD ) from the Instrumented Impact Test Based on the Local Approach

本文根据试验结果对断裂判据指标进行了选取；同时通过理论模型和非线性有限元方法分析了温度对裂纹尖端张开位移的影响，提出了不同温度下裂纹尖端张开位移的计算公式。

This paper analyzes the fracture criteria for prevention design based on the experiments and also analyzes the influences of temperature on CTOD , and proposes the equation for CTOD at different temperatur .

通过计算裂纹尖端附近的张开位移，利用位移外推插值法得到裂纹尖端的应力强度因子的结果。

Through computing the opening displacements in the vicinity of the crack tip , the stress intensity factor at the crack tip can be obtained by displacement extrapolation method .

为了测定高韧性材料Ⅰ-Ⅱ复合型裂纹的扩展方向和裂纹尖端张开位移矢量（（？））的启裂值，本文提出了适合于Ⅰ-Ⅱ复合型断裂的多剖面法。

In order to determine the directions of the propagation and to measure the crack tip opening displacement vector ( CTOD ) at initiation of ⅰ - ⅱ mixed mode cracks in high ductile materials , a multi-sectional method for ⅰ - ⅱ mixed mode fracture was proposed .

解方程后计算了裂纹尖端塑性区尺寸及裂纹尖端张开位移COD，给出了应变能释放率算式。

The solutions are used to formulate the plastic zone length of the crack tip and COD and get the releasing ratio of strain energy .

测试泵体裂纹或破裂。GB/T2358-1994金属材料裂纹尖端张开位移试验方法

Test method for crack-tip opening displacement measurement of metallic materials

本文提供的边界积分方程法计算机程序，可较精确地用于各种结构的边裂纹或长表面裂纹的弹塑性分析及裂纹尖端张开位移的计算，从而可对这些结构进行断裂分析。

The BIE method computer program , presented in this paper , can be accurately used for the elastoplastic fracture analysis of edge crack or long surface crack in various structural components .

评定是在给定裂纹尺寸和载荷条件下，应用有限元分析，根据CTOD（裂纹尖端张开位移）试验结果进行的。

Given crack size and load , the assessment was carried out according to the crack tip opening displacement test result and using finite element analysis .