Mathematical Models for Calculation of Crack Resistance of Composite Materials

Abstract:

Crack resistance is an important parameter determining the carrying capacity and durability of composite materials in which as a binding element apply adhesive compositions. Estimation of crack resistance is usually carried out using an energy criterion – specific energy of crack propagation. Existing mathematical models to determine the value of crack resistance do not always give reliable results, because they can contain several dependent variables. In the article the mathematical models of the two types for calculation of crack propagation energy, which includes only one independent parameter, which needs to be defined experimentally are received. For the mathematical model of type I on the experimental setup it is necessary to define value of bending moment at which the formation of crack. Use of mathematical model of II type does not demand experimental setup as independent parameter is the radius of curvature of the bent beams.

• Periodical: Key Engineering Materials (Volume 736)
• Pages: 68-72
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.736.68
• Online since: June 2017
• Authors: Sergei Koryagin*, Oleg V. Sharkov, Nikolay Velikanov
• Keywords: Composite Material, Crack Propagation Energy, Crack Resistance, Mathematical Model

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