Sohesive zone length influence on the critical load for a body with mode I crack

1Kaminsky, AA
1Selivanov, MF
1Chornoivan, Yu.O
1S.P. Timoshenko Institute of Mechanics of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2018, 8:36-44
Section: Mechanics
Language: Ukrainian

The limiting state of an elastic infinite body with mode I crack is studied, by using the fracture process zone model. A numerical method is proposed to solve fracture mechanics problems for various traction—separation laws. The validity of the proposed method application is proven by a comparison of the results for a simple linear softening relationship with the results by other researchers, which were obtained within different methods. The influence of the cohesive length on the critical load is investigated. An error of the neglect of the stress finiteness condition is determined for the statements, which are common for FEM solutions.

Keywords: fracture, process zone, shape factors, stress finiteness condition, traction—separation law
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