The new criterion includes the integral features of the whole field, while the theory of minimum strain-energy-density factor considers only a single point in the cracktipfield.
较之仅着眼于纹尖场某一点的最小应变能密度因子理论，新判据更多地顾及到了尖端场的全局。
2
Based on the electromagnetic theory the relation between the acceleration movement of electric charge in the cracktip end, the value of electromagnetic field and the spectrum are analyzed.
根据实验结果，利用电磁学理论，分析了由于裂纹尖端电荷的加速运动所激发的电磁场强度及其频谱特性。
3
The cracktip stress-strain field of elastic-plastic materials are analysed by finite element method in the plane stress condition.