A computational evaluation of surface fracture growth and stress intensity factors for standard parts with complicated geometry

Аuthors

Bespalov V. А.¹, Ghotseliuk T. B.¹, Laznenko S. А.¹, Matveyev K. А.², Chaplygin V. N.¹

1. Siberian Aeronautical Research Institute named after S.A. Chaplygin, 21, Polzunov St., Novosibirsk, 630051, Russia
2. Novosibirsk State Technical University, 20, prospect Karla Marksa, Novosibirsk, 630073, Russia

Abstract

A technique is suggested to estimate numerically values of surface fracture growth and stress intensity factors (SIF) for standard parts with complicated geometry. A module is developed basing on the ANSYS finite-element software package. This module allows to generate automatically a net of singular elements and to evaluate SIF distribution along the front of elliptic-shaped fracture. Numerical and experimental investigations are carried out for fracture growth duration in regard to structural elements of airliner high-lift devices. It is demonstrated that the proposed technique for finite-element SIF and crack growth resistance evaluation provides results, which are acceptable with respect to accuracy.