A Continuum Model for Void Nucleation by Inclusion Debonding Academic Article uri icon

abstract

  • A cohesive zone model, taking full account of finite geometry changes, is used to provide a unified framework for describing the process of void nucleation from initial debonding through complete decohesion. A boundary value problem simulating a periodic array of rigid spherical inclusions in an isotropically hardening elastic-viscoplastic matrix is analyzed. Dimensional considerations introduce a characteristic length into the formulation and, depending on the ratio of this characteristic length to the inclusion radius, decohesion occurs either in a 'ductile' or 'brittle' manner. The effect of the triaxiality of the imposed stress state on nucleation is studied and the numerical results are related to the description of void nucleation within a phenomenological constitutive framework for progressively cavitating solids.

published proceedings

  • Journal of Applied Mechanics

altmetric score

  • 3

author list (cited authors)

  • Needleman, A

citation count

  • 1707

complete list of authors

  • Needleman, A

publication date

  • September 1987