In order to study the effect of different surface crack parameters on the fracture failure of
steel plate, the model was established by FEM. The results showed that the edge surface
crack has the greatest influence on the fracture failure of the steel plate, and for non-edge
surface cracks, the central surface crack has the greatest influence on the fracture failure of
the steel plate. The larger the a/t and the smaller the a/c, the easier the steel plate fracture
failure occurs. The a/c has a certain influence on the variation law of K and the position
where Kmax appears.
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