Ultrasonic Nondestructive Evaluation of Damage in Continuous Fiber Composites
Abstract
It is well-known that composite materials develop a complex damage state when they are subjected to monotonic or fatigue loading. The damage has, in general, two effects on the propagation of an ultrasonic wave: it decreases the stiffness and increases the attenuation. The central objective of this work has been to correlate damage states with changes in the two ultrasonic parameters (wavespeed and attenuation). We have developed a new technique for measuring the wavespeed and attenuation in the thickness direction, in extremely thin laminates. We have also developed a technique for the excitation and detection of Lamb waves in the lengthwise direction. Thus, both the in-plane and out-of-plane measurements can be made. Composites, Velocity, Damage, Attenuation, Ultrasonic nondestructive evaluation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1987
- Accession Number
- ADA205713
Entities
People
- Vikram K. Kinra
Organizations
- Texas A&M University