WIT Press

The Driving Force On A Crack Approaching An Interface Of Materials With Different Yield Stresses: The Effect Of The Interlayer Thickness

Price

Free (open access)

Paper DOI

10.2495/FR980171

Volume

19

Pages

11

Published

1998

Size

1,030 kb

Author(s)

R. Pippan, F.O. Riemelmoser & K. Flechsig

Abstract

A crack growing perpendicular to an interface of a bimaterial. where the material partners have equal elastic but different plastic properties is discussed by a extension of Dugdale's crack model. The transition of the yield stress from material 1 to material 2 occurs in an interlayer with a finite thickness. The plastic zone size and the crack tip opening displacement is calculated in dependence on the applied stress intensity for both crack growth directions, soft- hard and hard-soft arrangement Analytical results are obtained for the simpler soft-hard case where the plastic zone always forms a single connected region In the hard-soft arrangement it occurs t

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