The research works on the relationship between interference fringes and the factorofstressintensity are introduced. The quantitative expression of this relationship has been found and introduced.
Stressintensityfactor (k). A factor used in fracture mechanics to specify the stressintensity at the tip of a crack.
应力强度因子(K)：断裂力学中使用的一个因子，说明裂纹尖端处的应力强度。
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The result indicates that the maximum of dynamical stressintensityfactor arrives behind the load time and increases with the size of thick wall cylinder.