Interfacial Debonding And Damage Progression
In Particle-reinforced Composites
Author(s)
S. Womack & M. S. Ingber
Abstract
Decohesion between the matrix and inclusions in advanced multi-component composite
materials is an important failure mechanism. In particular, the overall bulk
strength of the composite depends strongly on interfacial damage and debonding.
A 3-D model of interfacial decohesion is developed for a spherical particulatereinforced
composite material. In this model, interfacial failure is initiated by the
loss of ellipticity.Adiscrete constitutive equation is used to represent failure at the
interface of the composite. Incremental displacement steps are applied to the model
within the elastic range of the constituent materials and the interface is analyzed
using the boundary element method to determine the progression of interfacial damage
and debonding. The effective properties of the bulk composite are calculated
at each incremental step.
Keywords:composite materials, decohesion model, incremental debonding, boundary
element method.
1 Introduction
A composite is a manufactured material with two or more physically or chemically
distinct phases. Particle composites typically contain a matrix material and
inclusions. The interface between the inclusion and the matrix is a bonding surface,
across which both weak and strong discontinuities occur [1].Weak discontinuities
are defined as discontinuous changes in the strain field across the limits of a narrow
strain localization region over which the displacement field remains continuous.
Under load, strong discontinuities may develop, causing the displacement field to
become discontinuous and the strain field to become unbounded.
Keywords
composite materials, decohesion model, incremental debonding, boundary
element method.
Related Book
Other papers in this volume
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