Stress-strain and fracture toughness behaviour of composites reinforced with inhomogeneously distributed particles

Bernd Lauke

doi:10.1117/12.2259892

11 April 2017 Stress-strain and fracture toughness behaviour of composites reinforced with inhomogeneously distributed particles

Bernd Lauke

Author Affiliations +

Proceedings Volume 10165, Behavior and Mechanics of Multifunctional Materials and Composites 2017; 101650U (2017) https://doi.org/10.1117/12.2259892
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

Different failure mechanisms determine strength and fracture toughness of particle composites as, for example particle debonding and ductile matrix fracture. In real composites the particles are not homogeneously distributed. This leads to different levels of particle interaction under loading and consequently to higher stress concentrations in the matrix and at the particle/matrix interface for closer particles. This local inhomogeneity is modelled and the effect on stress-strain behaviour is discussed. On the other hand the variation of stresses in front of a crack also effects the stress concentration as a function of crack distance in the periphery of the local inhomogeneously distributed particles. This variation is considered for the modelling of fracture toughness of such composites. The influence of the pair distribution function on dissipation energies and on fracture toughness as a function of particle volume fraction is discussed.

Conference Presentation

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Bernd Lauke "Stress-strain and fracture toughness behaviour of composites reinforced with inhomogeneously distributed particles", Proc. SPIE 10165, Behavior and Mechanics of Multifunctional Materials and Composites 2017, 101650U (11 April 2017); https://doi.org/10.1117/12.2259892

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