Paper 1

(cited 232 times, by January 2002)

M.F. ASHBY, F.J. BLUNT and M. BANNISTER, FLOW CHARACTERISTICS OF HIGHLY CONSTRAINED METAL WIRES. ACTA METALLURGICA, 37, 1847-1857 (1989).

Paper 1

(cited 205 times, by January 2002)

ASHBY MF, HALLAM SD, THE FAILURE OF BRITTLE SOLIDS CONTAINING SMALL CRACKS UNDER COMPRESSIVE STRESS STATES. ACTA METALLURGICA, 34, 497-510 (1986).

Paper 1

(cited 174 times, by January 2002)

FLECK NA, MULLER GM, ASHBY MF and HUTCHINSON JW, STRAIN GRADIENT PLASTICITY - THEORY AND EXPERIMENT. ACTA METALLURGICA ET MATERIALIA, 42, 475-487, 1994.

Abstract: Dislocation theory is used to invoke a strain gradient theory of rate independent plasticity. Hardening is assumed to result from the accumulation of both randomly stored and geometrically necessary dislocations. The density of the geometrically necessary dislocations scales with the gradient of plastic strain. A deformation theory of plasticity is introduced to represent in a phenomenological manner the relative roles of strain hardening and strain gradient hardening. The theory is a nonlinear generalization of Cosserat couple stress theory. Tension and torsion experiments on thin copper wires confirm the presence of strain gradient hardening. The experiments are interpreted in the light of the new theory. thermal activation.