Elastic Constants of Layers in Isotropic Laminates

Published

November 1, 2003

Author(s)

F Hayliger, H M. Ledbetter, Sudook A. Kim, Ivar E. Reimanis

Abstract

We determined the individual laminae elastic constants in multilayer laminates composed of dissimilar isotropic layers using acoustic resonance spectroscopy and the linear theory of elasticity. Resonant ultrasound allows one to measure the free-vibration response spectrum of a traction-free solid under periodic vibration. These frequencies depend on pointwise density, laminate dimensions, layer thickness, and layer elastic constants. Given a material with known mass but unknown constituation, this method allows one to extract the elastic constants and density of the constitutent layers. This is accomplished by measuring the frequencies and then minimizing the differences between these and those calculated using the theory of elasticity for layered media to select the constants that beat replicate the frequency response spectrum. We apply our approach to a three-layer, unsymmetric laminate of W_pCu and find very good agreement with the elastic constants of the two constituent materials.

Citation

Journal of the Acoustical Society of America

Volume

114

Issue

No. 5

Pub Type

Journals

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Keywords

composite, cooper, elastic constants, graded material, laminate, tungsten, ultrasonics

Citation

Hayliger, F. , Ledbetter, H. , Kim, S. and Reimanis, I. (2003), Elastic Constants of Layers in Isotropic Laminates, Journal of the Acoustical Society of America, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851293 (Accessed October 31, 2024)