Analysis of thickness-direction ultrasonic wave propagation of fiberglass reinforced plastics laminates
Abstract
Theoretical and experimental results are presented regarding the effects of inhomogeneous laminate structures (i.e., woven or chopped strand mat) and three-dimensional effective elastic constants on ultrasonic wave propagation in GFRP laminates. A digital device was designed to measure the propagation velocity and attenuation with thickness of ultrasonic waves in such composites. It is shown that intermediate reflected waves in such composites can be removed electrically by applying an appropriate level of rejection in order to ensure the detection of the base echo.
- Publication:
-
In: ICCM/2; Proceedings of the Second International Conference on Composite Materials
- Pub Date:
- 1978
- Bibcode:
- 1978aime.conf.1104K
- Keywords:
-
- Glass Fiber Reinforced Plastics;
- Laminates;
- Ultrasonic Tests;
- Wave Propagation;
- Echoes;
- Elastic Properties;
- Isotropy;
- Modulus Of Elasticity;
- Nondestructive Tests;
- Poisson Ratio;
- Stiffness Matrix;
- Stress-Strain Relationships;
- Ultrasonic Radiation;
- Instrumentation and Photography