Investigation Of Roughness Induced Crack
Closure Effects In Fatigue
Author(s)
M.R. Parry, S. Syngellakis & I. Sinclair
Abstract
The incidence of roughness induced fatigue crack closure has been studied by
finite element modelling. Results show an increasing effect of crack path angle
on closure levels with the closure mechanism being strongly dependent on
residual plastic strains in the wake rather than global shear displacements of the
fracture surfaces. An analytical expression for the functional dependence of
roughness induced closure has been produced which shows reasonable
agreement with the finite element results.
1 Introduction
The phenomenon of fatigue crack closure is widely considered to have a strong
influence on fatigue crack growth. As such, directed alloy development,
accurate life prediction and the implementation of economic inspection
procedures in engineering structures are dependent upon the ability to quantify
this effect [1, 2]. Many aluminium aerosp
Keywords
Related Book
Other papers in this volume
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