| This paper presents a method to calculate elastodynamic fracture parameters of surface crack by using the elastic line-spring model combined with perfect ANSYS software. The main content includes :The traditional line-spring model which is used in the static analysis of surface crack is extended to the dynamic case, the corresponding constitutive relations are derived and combined with the software ANSYS, and then the corresponding computational technique is formulated.A static and a transient analysis of an embedded crack in a long elastic strip are carried out. The results are approximate to the ones that existed. And the effects of the factors including the crack configuration, the crack depth, the strip length and the strip thickness on the transient response are discussed.A new line-spring element is established and combined into ANSYS ,which is used to analysis of surface crack . And static case and dynamic case are solved respectively, the results are consistent well with the accepted numerical solutions. It is shown that established element is successful , And the effects of the factors on the transient response are examined in detail.This method provided in this paper can simplify pre-process and drastically reduces computer time and achieve some certain accuracy as compared to full 3-D finite element method. It has shown that as an engineering numerical method ,it is suitable. |
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