Shear measurements of viscoelastic damping materials embedded in composite plates

Janet M. Biggerstaff; John B. Kosmatka

doi:10.1117/12.349801

2 June 1999 Shear measurements of viscoelastic damping materials embedded in composite plates

Janet M. Biggerstaff, John B. Kosmatka

Proceedings Volume 3672, Smart Structures and Materials 1999: Passive Damping and Isolation; (1999) https://doi.org/10.1117/12.349801
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Embedding viscoelastic damping materials into graphite/epoxy composites can greatly increase the damping of composite structures. Cocuring the damping material with the composite, however, has been shown to increase the modulus and lower the damping in many viscoelastic materials because epoxy penetrates many damping materials (especially acrylics). In this paper, the changes in shear modulus were measured using double lap shear tests. Also presented are shear moduli comparisons of samples cured with three different barrier film layers, Kapton^R, Tedlar^R,and polyester, which are used to prevent the epoxy penetration. Lastly, samples with an embedded loosely woven scrim cloth placed between two damping material layers are tested to measure how the scrim affects the shear modulus.

Citation Download Citation

Janet M. Biggerstaff and John B. Kosmatka "Shear measurements of viscoelastic damping materials embedded in composite plates", Proc. SPIE 3672, Smart Structures and Materials 1999: Passive Damping and Isolation, (2 June 1999); https://doi.org/10.1117/12.349801

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