Methods for determination of the stress intensity factors (SIF) for defective elements with a closed

摘要

The bases of engineering methods of determination of stress intensity factors (SIF)are considered for the elements with cracks of the closed type. Mathematical models are builtand SIF is are explored using two methods – through nominal tensions in netto-section andthrough the change of moment of inertia of the transversal crossing of elements. Correctionalfunctions for thin-walled profiles are given. The analytical and experimental results of SIF’sare compared.