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Self-healing polymeric materials developed in the last decade is one of the marvels in the field of material science and polymer chemistry. Self-healing Glass Fibre Reinforced Plastics (GFRP) was fabricated with the microcapsule based self-healing system which can be triggered by the catalyst, when the capsule breaks open releasing the healing agent, during crack formation. The dynamic mechanical properties of the composite were assessed to find its dependence on temperature, stress and frequency and to report the changes in stiffness and damping. The storage modulus, loss modulus and damping factor were investigated for various frequencies and temperature and discussed.

Keywords

Dynamic Mechanical Analysis, Self-Healing Polymer, Glass Fibre Reinforced Plastics, Frequency Sweep, Damping Factor.

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Finite Element Modelling and Analysis of Micro-Capsule Based Self-Healing Polymeric Composites

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Authors

J. Lilly Mercy ¹, S. Prakash ¹

Affiliations
1 School of Mech. Engg.,Sathyabama Institute of Sci. and Tech., Chennai, Tamil Nadu, IN

Source

International Journal of Vehicle Structures and Systems, Vol 10, No 6 (2018), Pagination: 458-466

Abstract

Self-healing polymeric composites are a class of functional composites which heal itself during damage. Out of the many methods of self-healing, micro-capsule based self-healing process is the proven and established method where the healing agent stored in the capsule breaks and seals up the gap after the polymerization reaction with the suitable catalyst. The incorporation of the capsule in a polymer matrix in a random fashion makes it challenging to model the composite material. This paper explains the modelling and simulation of the self-healing composite using MIDAS NFX FEA software. The effect of self-healing composition - micro-capsule size and concentration on the static mechanical properties of the composite is explored. The capsules are integrated in the polymer matrix as a representative volume element using the rule of mixtures. The classical laminate theory was used to identify the critical ply failure.

Keywords

Self-healing, Finite Element Modelling, Micro-Capsule, Classical Laminate Analysis, MIDAS NFX.

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