Details

Autor(en) / Beteiligte

• Shamina, A.A.
• Zvyagin, A.V.
• Smirnov, N.N.
• Luzhin, A.A.
• Panfilov, D.I.
• Udalov, A.S.

Titel

Computational modeling of cracks different forms in three-dimensional space

Ist Teil von

• Acta astronautica, 2021-09, Vol.186, p.289-302

Ort / Verlag

Elmsford: Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• All celestial bodies have defects in the form of cracks. Some of the bodies are large. Colliding with such objects can be dangerous. Therefore, the problem of grinding such bodies remains very urgent. In order to avoid large financial costs, you need to know where to strike in order to achieve the greatest effect. This paper studies the behavior of internal defects under various loads. A three-dimensional elastic medium weakened by a system of plane parallel cracks was examined in this study. A method of boundary elements called the method of discontinuous displacements, was chosen as the numerical method. The advantage of this method is that only the crack boundary is divided into elements, which allows the use of a small (compared to other numerical methods) amount of computer memory. The code was implemented in C ++. The interaction of two circular cracks was investigated depending on the size of the cracks and their relative locations. Calculating the singular integral is required when solving problems involving one crack. In case of several cracks, such integrals are not analytically incalculable. In this study, we present a method that does not require the calculation of singular integrals. •The suggested method makes it possible developing stresses in fractures interactions.•Numerically developed stress intensity factors are in good agreement with analytical solutions.•Two plane fractures interaction in space being located in non-parallel planes was investigated.•Formation of wrinkles on the surface of curved fractures brings to an essential decrease of stresses.