Table of Contents
ISRN Mechanical Engineering
Volume 2011 (2011), Article ID 876396, 7 pages
http://dx.doi.org/10.5402/2011/876396
Research Article

The Computing of Intersectant Relations for Its Strength Problem on Damage and Fracture to Materials with Short and Long Crack

1Zhejiang GuangXin New Technology Application Academy of Electromechanical and Chemical Engineering, 13E East Edifice, 160 International Garden Tiannushan Road, Hangzhou 310007, China
2Zhejiang Science and Technology University, 1 Xiaoheshan Road, Hangzhou 310023, China
3Zhejiang Vocational College of Commerce, 470 Bingwen Road, Hangzhou 310053, China

Received 30 January 2011; Accepted 27 March 2011

Academic Editor: J.-L. Marcelin

Copyright © 2011 Yangui Yu 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

Adopt two types of damage variables, π‘Ž and 𝐷 , and make the bidirectional combined coordinate system and the bidirectional curves in the whole process, describing their damage evolutive behaviors on fatigue damage-fracture to elastic-plastic steels; communicate the cross-referencing between their computing models and between describing curves at each stage among varied disciplines; bring forward a viewpoint about the driving force of material damage, that is the damage stress factor at crack forming stage, Provide the computation expressions and computing methods of the strength problem of materials with short crack and long crack at each stage; reveal the geometrical and the physical meaning of force triangle and its edge vector at each stage, Provide the conversion methods between the variables, the equations, the material constants and the dimensional units; Indicate the physical and the geometrical meanings for some key parameters. This will be having practical significance for promoting developing, and applying each discipline.