High strain rate will occur at the tip of a growing crack, whether quasi-static or dynamic growth, due to the existence of strain singularity.
在扩展裂纹尖端，无论是准静态扩展还是动态扩展，由于应变奇异性的存在，出现较高的应变速率。
2
The study shows that the coupled elastic and electric fields inside piezoelectric med ia depend on the speed of the crack propagation, and have singularity at the cr ack tip.
研究表明：介质内的耦合场与裂纹运动速度有关，在裂纹尖端有奇异；
3
Aim to establish the path independent integral and its dual form of energy type, and to determine the singularity order of stresses near the cracktip in plane quasicrystals.