Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
This publication analyses the influence of the geometry of the crack front on the propagation of a defect on a CT12 specimen made of Tu52b steel. The work is carried out using a numerical analysis based on the application of the Gfr criterion. This method, in the field of fracture mechanics, is used to simulate the ductile propagation of cracks in a structure.
The finite element simulation is performed using SYSTUS software, where different models are compared to observe the influence of the modelling of a non-straight crack front on the propagation of the defect, namely a crack front geometry determined by post-processing of the results. These models are compared to a model with a supposedly straight crack front.
A brief description of the Gfr criterion, initially defined in S. Marie's thesis (Reference [1]), is presented. Then, the results obtained using the model with a non-straight crack front are presented and discussed. It is shown that the impact of mesh refinement is low on the overall behavior of the specimen. A discussion of the J-integral values obtained is also done. Finally, a comparison with a straight crack front and a 2D model is used to verify whether the global behavior of a CT specimen is well represented by a model with a non-straight crack front. The overall behavior of the specimen will also be compared to analytical values by applying ASTM E1820 standard
