Strain-gradient effects on the asymptotic near-tip stress and velocity fields of a crack propagating steadily and quasi-statically in an elastic-plastic material displaying linear hardening are highlighted. The flow theory version of couple stress plasticity is adopted for the constitutive description of the material. Under mode I crack propagation a substantial increase of the stress singularity is observed and, thus, of the traction level ahead of the crack-tip, whereas an increase in the shear traction ahead of the crack-tip is noticed under mode II loading conditions.
Crack growth in elastic-plastic materials with strain-gradient effects / Radi, Enrico; Gei, M.. - STAMPA. - (2002), pp. 275-284. (Intervento presentato al convegno XVI Convegno Nazionale IGF 2002 tenutosi a Catania nel 20-22 Giugno, 2002).
Crack growth in elastic-plastic materials with strain-gradient effects
RADI, Enrico;
2002
Abstract
Strain-gradient effects on the asymptotic near-tip stress and velocity fields of a crack propagating steadily and quasi-statically in an elastic-plastic material displaying linear hardening are highlighted. The flow theory version of couple stress plasticity is adopted for the constitutive description of the material. Under mode I crack propagation a substantial increase of the stress singularity is observed and, thus, of the traction level ahead of the crack-tip, whereas an increase in the shear traction ahead of the crack-tip is noticed under mode II loading conditions.Pubblicazioni consigliate
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