Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Fracture mechanics approach to design analysis of notches, steps and internal cut-outs in planar components

Gray, T.G.F. and Wood, J. (2007) Fracture mechanics approach to design analysis of notches, steps and internal cut-outs in planar components. Journal of Strain Analysis for Engineering Design, 42 (6). pp. 433-446. ISSN 0309-3247

[img]
Preview
PDF (strathprints005070.pdf)
strathprints005070.pdf

Download (537kB) | Preview

Abstract

A new approach to the assessment and optimization of geometric stress-concentrating features is proposed on the basis of the correspondence between sharp crack or corner stressfield intensity factors and conventional elastic stress concentration factors (SCFs) for radiused transitions. This approach complements the application of finite element analysis (FEA) and the use of standard SCF data from the literature. The method makes it possible to develop closed-form solutions for SCFs in cases where corresponding solutions for the sharp crack geometries exist. This is helpful in the context of design optimization. The analytical basis of the correspondence is shown, together with the limits on applicability where stress-free boundaries near the stress concentrating feature are present or adjacent features interact. Examples are given which compare parametric results derived from FEA with closed-form solutions based on the proposed method. New information is given on the stress state at a 90° corner or width step, where the magnitude of the stress field intensity is related to that of the corresponding crack geometry. This correspondence enables the user to extend further the application of crack-tip stress-field intensity information to square-cornered steps, external U-grooves, and internal cut-outs.

Item type: Article
ID code: 5070
Keywords: stress concentration factor, notch interaction, notch shielding, slots, steps, U-grooves, Mechanical engineering and machinery, Mechanics of Materials, Modelling and Simulation, Mechanical Engineering, Applied Mathematics
Subjects: Technology > Mechanical engineering and machinery
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Strathprints Administrator
Date Deposited: 07 Jan 2008
Last modified: 24 Jul 2015 13:01
URI: http://strathprints.strath.ac.uk/id/eprint/5070

Actions (login required)

View Item View Item