Thermal Activation of Asymetrical Composites for Vibration Control

Axel Imbert,David Rigel Rigel,Bernard Durand,Fabrice Laurent,Gildas L’Hostis

doi:10.4236/mme.2013.33a001

Abstract

The CBCM (Controlled Behaviour Composite Material) is a thermal active composite, which has been developed for morphing applications. The thermal activation is made by a source of heating generated within the composite structure. The coupling between the induced thermal field and the thermomechanical properties of the various components of the composite structure leads to the change of the structure shape. The heat source is generated by Joule effect, Carbon yarns inserted in the composite, are connected to a power supply. The application field of CBCM technology is the domain of shape modification and active assembly. The objective of this work is to illustrate the capabilities of CBCM in the domain of vibration control. We will study several reference plates with different constitution. The influences of these different constitutions, of the CBCM effect and the loss of stiffness for the matrix will be highlighted, for two boundary conditions, free/free and embedded/embedded.

Highlights

Smart materials can be defined as materials which are able to change their form, their mechanical or any physical properties to adapt to their background
The concept of a thermal activation based on a bimetallic effect, CBCM effect [7,8] has been studied for morphing structure, the objective of this work is to show the ability of this technology in the field of vibration control of composite structures
The longitudinal rigidity is greater for the SL plate than the ST one; which is the opposite for the transversal rigidity

Summary

Introduction

Smart materials can be defined as materials which are able to change their form, their mechanical or any physical properties to adapt to their background. They are more and more used for technical applications and in the field of controlling structural deformations. The interface strength between the actuator and the composite plays a crucial role It is a limit of such a technology for the time life of the structure, especially when the rigidity of the composite structure is high, because to deform the structure the actuator has to fight against this rigidity. The whole structure can be considered as an actuator and the problem of interface cohesion is not concentrated at the inter*

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Conclusion