WIT Press

Dynamic Stress Intensification Due To A Moving Heat Source In A Thin Plate

Price

Free (open access)

Paper DOI

10.2495/FR980451

Volume

19

Pages

9

Published

1998

Size

483 kb

Author(s)

A.I. Zhornik, V.A. Zhornik & L.I. Sirota

Abstract

Dynamic thermoelastic stresses induced by a sharp change in temperature of a thin plate with a semi-infinite crack, whose tip is moving at a constant velocity since an initial time, are considered. At the crack tip, non-stationary heat sources are brought about by thermomechanic conversion, and as a result, a sharp time-dependent change in temperature occurs on the crack edges. The main result is evaluated as an expression for the SIF. 1 Introduction In a thin isotropic plate 18 thick having a constant temperature T^ there is a long rectilinear (semi-infinite) crack. The plate is subjected to increasing tensile load applied at infinity. Under critical external load an unsteady (dynamic) crack propagation starts

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