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Published on: April 27, 2019
Elastic constants of layers in isotropic laminates
Paul R Heyliger1, Hassel Ledbetter, Sudook Kim
1Department of Civil Engineering, Colorado State University, Fort Collins, Colorado 80523, USA.
The Journal of the Acoustical Society of America
|December 3, 2003
Summary
Ultrasonic-resonance spectroscopy accurately determined elastic constants in multilayer laminates. This method precisely measures material properties by analyzing vibration frequencies for layered media analysis.
Area of Science:
- Materials Science
- Solid Mechanics
- Acoustics
Background:
- Determining elastic constants of individual layers in dissimilar laminates is challenging.
- Layered materials are crucial in various engineering applications.
Purpose of the Study:
- To develop and apply a method for determining individual laminae elastic constants in multilayer laminates.
- To validate the technique using a specific WpCu laminate.
Main Methods:
- Utilized ultrasonic-resonance spectroscopy to measure the free-vibration response spectrum.
- Employed linear theory of elasticity to model the laminate's vibrational behavior.
- Minimized discrepancies between experimental and theoretical frequencies to extract elastic constants.
Main Results:
- Successfully determined the elastic constants for individual layers in a three-layer, unsymmetric WpCu laminate.
- Demonstrated very good agreement between the extracted constants and known material properties.
- Validated the efficacy of ultrasonic-resonance spectroscopy for laminate analysis.
Conclusions:
- Ultrasonic-resonance spectroscopy is a reliable method for characterizing the elastic properties of constituent layers in dissimilar laminates.
- The technique provides accurate elastic constants essential for predicting laminate behavior.
- This approach offers a non-destructive way to analyze complex layered materials.
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