Mathematical model of boundary crack propagation at bending of symmetric thin-walled flanks
Journal Title: Вісник Тернопільського національного технічного університету - Year 2017, Vol 86, Issue 2
Abstract
There was studied engineering methods for determining stress intensity factors for complex symmetrical cross-sectional flank open at the edge of the crack by the action of stretching and bending effort. Analysis of specific stages crack propagation edge coupled Z-shaped flanks was carried out. Mathematical models and change depending obtained axial cross-sectional moment of inertia dual Z-like flank and intensity ratios derived by two methods – through nominal tension in the net – the intersection and in the development of boundary cracks were built. Analytical analysis proved the stress intensity factor for thin-walled coaxial elements Z-shaped flank, which perceive tensile strain and pure bending; correction functions which account for changing the geometry of the cross section in the development of cracks. A generalized correction function coupled, symmetric Z-flanks similar size 200x87x6 mm, which simplifies the calculation of residual life of structural elements of the system was obtained.
Authors and Affiliations
Taras Dovbush, Nadia Khomuk, Anatolii Dovbush, Natalia Rubinets
Keywords
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