Computational modeling of polygonal cracks

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Computational modeling of polygonal cracks

Shamina, A.A. / Shamin, A.Y. / Udalov, A.S. / Zvyagin, A.V.

Abstract One of the main challenges for spaceflight safety is preventing crack growth. These defects can occur both in the skin of spacecraft and during the combustion of solid fuels. An important problem is the propagation of cracks at high temperatures. This paper proposes a study of a single polygonal crack under a constant load perpendicular to the crack plane. The solution is constructed numerically using the boundary element method. The main goal of the work is to calculate the stress intensity factors in the vicinity of the crack. The first intensity coefficient was calculated, and calculations were carried out for various crack parameters.

Highlights • A symmetrical and asymmetrical polygonal cracks were studied. • An asymmetrical crack is more resistant to growth than a symmetrical one. • For a symmetrical crack the stress intensity factor increases in proportion to the size of the crack. • For an asymmetric crack, the stress intensity factor does not change on increasing one shoulder.