Table of Contents
ISRN Mechanical Engineering
Volume 2013 (2013), Article ID 471458, 11 pages
http://dx.doi.org/10.1155/2013/471458
Research Article

Stress Intensity Factors for Cracked Finite Plates with Mixed Boundary Condition

Key Laboratory of Energy Engineering Safety and Disaster Mechanics, Ministry of Education, College of Architecture and Environment, Sichuan University, Chengdu 610065, China

Received 9 July 2013; Accepted 31 July 2013

Academic Editors: k. Mekheimer, A. Z. Sahin, and G.-J. Wang

Copyright © 2013 Zheyuan Hu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The mixed boundary problems for finite plates with one crack or two collinear cracks are studied. Complex stress functions that satisfy the equilibrium equations and compatibility conditions in the cracked plate as well as the stress condition on crack surfaces are presented. Four models, that is, a square plate with one crack or with two collinear cracks and an airfoil-shaped plate with one crack or with two collinear cracks, are established. The unknown coefficients of the complex stress functions are determined by using boundary collocation method (BCM). The effects of crack orientation, crack distance, and boundary condition on SIFs are investigated by combining with BCM, and the corresponding photoelastic experiments are conducted. The test results generally agree with the BCM calculation results.