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1)  damage open displacement of crack tip δ d'
损伤张开位移δd'
2)  displacement damage
位移损伤
1.
The numerical calculation on displacement damage of Si and GaAs semiconductor material irradiated by neutron;
中子对Si及GaAs半导体材料位移损伤的数值计算
2.
Displacement damage of several radiation sources are calculated with this method.
根据硅位移kerma函数表,针对传统的基于平均能量的kerma因子取值方法在位移损伤计算中的不足,提出了不同能量中子分群方式下硅位移kerma因子取值的新方法——平均位移kerma因子法。
3.
Optocoupler 4n25 is selected for 1MeV energetic electron and Co60γray radiztion,The relation between parameter degradation with energetic particle flux is obtained,From analyse mechanism of displacement damage effect and ionization effect on material and device,the radiation effect of Optocoupler is discussed.
选取了一种典型的光电耦合器4n25进行了1MeV高能电子及Co60γ辐照试验,获得了1MeV电子及Co60γ辐照后光电耦合器4n25 CTR参数的退化与粒子的通量的关系,通过辐射对器件及材料作用过程的分析,探讨了光电耦合器位移损伤效应及电离辐射效应。
3)  opening displacement
张开位移
1.
The boundary integral method is applied to the analysis of opening displacement and stress intensity factor of surface crack.
用边界积分方法,分析表面裂纹的张开位移和应力强度因子。
2.
Under the ratios of various initial cracking relative length,height and volume of gas concrete beam,the whole curve of opening displacements at several testing points about fracture toughness,fracture energy,and in the area of load,cracking-tip-opening-displacement,cracking tip opening displacement cracking-tip-area are researched systematically.
在本研究中对加气混凝土梁在不同初始裂纹相对长度、不同高度以及不同体积比例等情况下的断裂韧性、断裂能以及载荷—裂纹口张开位移—裂纹尖端张开位移—裂纹尖端前沿区若干测点张开位移全曲线进行了系统研究。
3.
The fracture energy,the crack mouth opening displacement and the crack tip opening displacement of the specimens were also measured.
为了研究聚丙烯纤维对水泥稳定碎石断裂韧性的影响,通过聚丙烯纤维水泥稳定碎石和普通水泥稳定碎石的三点弯曲试件断裂试验,测得了试件的断裂能、裂缝嘴张开位移和裂缝尖端张开位移,给出了聚丙烯纤维体积掺量的合理范围——0。
4)  crack tip opening displacement
张开位移
1.
Engineering solution of crack tip opening displacement for surface plate subjected to uniformly distributed forces with center through crack is derived.
首先对EPRI方法建立的裂纹中心板张开位移的工程解进行了实例计算,然后用有限元法对平板中心穿透裂纹张开位移计算得到的有限元解与其进行了比较,得出工程解偏于保守的结
5)  crack opening displacement
张开位移
1.
The SPI technique was used to measure in situ the crack tip strain and crack opening displacement(COD) at various loading stages in one loading cycle during constant amplitude fatigue crack propagation.
应用散斑干涉技术,在常幅载荷下对疲劳裂纹扩展过程中的一个循环周期内,不同加载阶段的裂尖应变、裂纹张开位移进行了原位测量,给出了裂纹闭合对裂纹张开位移及裂尖形变的影响规律。
2.
The relationship between fictitious crack length and stress intensity factor or crack opening displacement is also given.
基于虚裂纹模型的概念 ,导出了无限大板中心直裂纹在远场均匀拉应力作用下双参数模型的应力函数和位移函数 ,其解由线弹性断裂力学解、Dudale的解答和加权积分法导出的虚裂纹模型解所构成 ,最后给出了虚裂纹长度与应力强度因子及张开位移的关
3.
In this paper, a method is proposed to estimate the plastic zone size, by extending the Dugdale model to three dimensional (3D) crack problems and the crack opening displacement (COD) at the tip of a sptatial penny shaped crack by combining the Barenblatt Dugdale model with the principle of 3D J integral, then the relationship between J integral and COD is obtained.
将Dugdale模型推广到三维裂纹问题计算了圆盘状裂纹前缘塑性区尺寸,并结合断裂力学中的Barenblat-Dugdale裂纹模型和三维J-积分原理计算了圆盘状裂纹前缘张开位移,得到了J-积分与裂纹张开位移的关系。
6)  crack opening displacement
裂纹张开位移
1.
The main purpose is to study fracture character of high density polyethylene gas pipe material on the basis of crack opening displacement.
以裂纹张开位移的特征值参量为基础,对我国燃气工业中应用的高密度聚乙烯(HDPE)管材的断裂特性进行了研究。
2.
Recommended equations used for estimating crack opening displacement (COD) were given.
文中给出了推荐的高应变区裂纹张开位移 (COD)估算式。
3.
Based on the fracture experiment results of concrete,a method expressing the crack opening displacement in FPZ is presented by using power function series.
综合分析了混凝土断裂特征 ,和描述载荷与变形关系曲线连续函数 根据混凝土断裂过程区的观测结果 ,推出以幂函数多项式表达断裂过程区虚拟裂纹张开位移的表达方法 ,通过最小二乘法导出了计算该多项式中待定系数的代数方程 ,并且由实测裂纹张开位移数据给出了若干计算实例分析和讨
补充资料:裂纹尖端张开位移
分子式:
CAS号:

性质:在外载荷的作用下,裂纹尖端两表面间的张开位移。用符号δ表示。由于在弹塑性条件下,已得到δ与工作应力σ(或应变ε)以及裂纹尺寸a(裂纹的半长)之间的关系,因此它是弹塑性断裂力学中的一个重要参量。 

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