2) Chemical Shift Tensor
化学位移张量
1.
Chemical Shift Tensors of spin nuclei in solid contain the important information of electronic distribution around nucleus and of molecular structure, and can be generally expressed by a 3×3 matrix.
固体中核化学位移张量包含了核外电子分布、分子结构的信息,用NMR方法测量物质的化学位移张量对于研究物质的结构具有极其重要的意义。
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) spreading displacement
扩张位移
1.
The spreading displacement is applied along the crustal bottom beneath the O.
扩张位移边界条件加载于冲绳海槽内大陆地壳的底部,俯冲位移边界条件加载于菲律宾海板块的俯冲带。
补充资料：化学位移成像
化学位移成像
磁共振成像术语。把处于不同分子结构内的质子产生的化学位移量用二维图像显示出来，使图像既包括了
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条