Numerical modelling of roughness and plasticity induced crack closure effects in fatigue


Parry, M.R., Syngellakis, S. and Sinclair, I., (2000) Numerical modelling of roughness and plasticity induced crack closure effects in fatigue Strarke, Jr., E.A., Sanders, Jr., T.H. and Cassada, W.A. (eds.) In Aluminium Alloys - Their Physical and Mechanical Properties. Trans Tech., pp. 1473-1478.

Download

[img] PDF parr_00a.pdf - Accepted Manuscript
Download (1MB)

Description/Abstract

The incidence of roughness induced fatigue crack closure has been studied by finite element modelling. Based on an analysis of both overall specimen compliance and node behaviour along the crack path the present modelling shows: (a) an increasing effect of crack path angle on roughness induced closure levels in keeping iwht the simple analytical model of Suresh and Ritchie; (b) the mechanism by which closure occurs is due to residual plastic strains in the wake, rather than global shear displacements of the fracture surfaces due to mixed-mode behaviour at the crack tip; and (c) the closure levels are relatively low compared to experimental data, consistent with the absence of environmental irreversibility in the finite element models and the idealised crack path morphologies that were used. Slip band simulations show a significant increasing effect of inhomogeneous deformation on closure levels, improving hte apparent accuracy of the modelling results.

Item Type: Conference or Workshop Item (Paper)
ISBNs: 0878498532 (print)
Venue - Dates: 7th International Conference ICAA7, 2000-04-09 - 2000-04-14
Related URLs:
Subjects:
ePrint ID: 21421
Date :
Date Event
2000Published
Date Deposited: 15 Mar 2007
Last Modified: 16 Apr 2017 22:56
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/21421

Actions (login required)

View Item View Item