Effect of specimen geometry on fatigue crack growth in plane strain. I - Constant amplitude response. II - Overload response
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Shercliff, H. R.↗
Engineering topics
Fleck, N. A.
Publications and source records attributed to Fleck, N. A..
Overload retardation due to plasticity-induced crack closure
Experiments are reported which show that plasticity-induced crack closure can account for crack growth retardation following an overload. The finite element method is used to provide evidence which supports the experimental observations of crack closure. Finally, a simple model is presented which predicts with limited success the retardation transient following an overload.
Fleck, N. A.↗
Analysis of crack closure under plane strain conditions
The phenomenon of plasticity-induced crack closure is associated with the development of residual material on the flanks of an advancing fatigue crack. While it is easy to see that this residual material can come from the side faces of a specimen under plane stress conditions, it is difficult to discover the origin of this extra volume of material on the crack flanks when it is assumed that plane deformations occur and plastic flow is incompressible. The purpose of this paper is to determine whether plasticity-induced fatigue crack closure occurs in an elastic-perfectly plastic body under plane strain conditions.
Fleck, N. A.↗