裂纹

Central cracked circular disk; split Hopkinson pressure bar; dynamic fracture ; dynamic stress intensity factor

中心裂纹圆盘；分离式霍普金森压杆；动态断裂；动态应力强度因子

The fracture toughness testing technique for the central cracked circular disk specimen is given to investigate the fracture behavior of brittle material polymethyl methacrylate under pure mode Ⅰ, pure mode Ⅱ and mixed-mode loadings. The experimental results show that the load distribution angle is always greater than 8° for all different loading conditions.

给出一个中心裂纹圆盘断裂试验的较完整的试验技术，并用此试验技术在岛津材料试验机上对有机玻璃(polymethyl methacrylate， PMMA)这种典型的脆性材料成功地进行纯Ⅰ型、纯Ⅱ型和复合型加载条件下的断裂试验。

This mentality creates the crack in the moral and social contract which exists regarding a citizenry and its military.

这种心态造成的裂纹，在道德和社会的合同存在的关于公民和其军事。

There is a faint clanking sound, the smell of ozone, an electrical crackle in the air.

有微弱的叮当声，闻到臭氧、电气裂纹在空中。

Because of 3D-DDM is characteristic of solving the discon- tinuity displacement essentially, then adopting it on stress intensity factor close-by crack tip is convenient and directly, moreover, simulative pattern is reasonable and predominantly.

由于三维位移不连续法本身具有求解单元不连续位移的特点，因此依此求解裂纹尖端应力强度因子便捷而直接，模拟系统的选择是合理且优越的。

In general, the diffusion coefficient of the crack is much greater than that of sound concrete.

2.5.2作用的开幕式和闭幕式的议案裂纹对氯离子扩散一般扩散系数的裂缝是较健全的混凝土。

And the singularity exponent is uniquely determined by the viscosity coefficient of the material.

在线性硬化条件下，裂纹尖端的应力和应变场具有相同的幂奇异性，奇异性指数由材料的粘性系数唯一确定。

The effectiveness of the proposed approach is demonstrated by simulations of cohesive crack growth in concrete.

对混凝土粘结裂纹扩展的数值模拟说明了该计算方法的有效性。

The blast and comminution in exploitation industry of rock and mineral may benefit from this degradation.

这些缺陷在载荷作用下造成裂纹的孕育、萌生、繁衍、扩展和贯通，导致介质的强度和刚度降低。

On the other hand, our method can deal with the problem with many singular points in complex domain by coupling with the FEM .

数值例子表明我们的方法在数值求解有裂纹或角点的复合材料问题时，是非常方便和有效的。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。