Generalized Linear Elastic Fracture Mechanics: An Application to a Crack Touching the Bimaterial Interface

Abstract:

In the contribution the limits of the validity of classical linear elastic fracture mechanics are extended to problems connected with failure of composite structures. The work is focused mainly on the case of a crack touching the interface between two different materials, two different constituents. The approach suggested in the paper facilitates the answer to the question what is the influence of particle (in particulate composite) or layer (in laminates) on crack propagation through bimaterial interface. Different composite (bimaterial) structures are considered: layered composites and composites reinforced by particles. The presented approach follows the basic idea of linear elastic fracture mechanics, i.e. the validity of small scale yielding conditions is assumed, and has a phenomenological character.

• Periodical: Key Engineering Materials (Volumes 452-453)
• Pages: 445-448
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.452-453.445
• Online since: November 2010
• Authors: Luboš Náhlík, Lucie Šestáková, Pavel Hutař, Zdeněk Knésl
• Keywords: Bimaterial Interface, Composite Material, Fracture Criterion, Generalized Linear Elastic Fracture Mechanics, Generalized Stress Intensity Factor, Strain Energy Density Factor

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