Nucleation of crack is due to dislocation pile-up mechanism and elasticanisotropy mechanism.
裂纹形核主要是通过位错堆积、晶界角源及弹性各向异性三种机理产生的。
2
The elastic parameters, their main evidences and relevance to the earth's dynamics of the anisotropy of the upper mantle are discussed in this paper.
本文论述了上地幔各向异性的参数描述和主要证据，以及与地球动力学的关系。
3
Several linear polyene compounds with extraordinarily large dielectric anisotropy and small elastic constant were synthesized and their physical properties evaluated.