Interactions of Ultrasonic Waves with Composite Plates

reportActive / Technical Report | Accession Number: ADA206991 | Open PDF

Abstract:

We present a unified analytical treatment of the interaction of ultrasonic waves with single and multilayered arbitrarily oriented anisotropic elastic plates. The individual components forming the plate are allowed to possess up to as low as monoclinic symmetry. The plates are assumed to be immersed in a fluid and subjected to incident acoustic waves at arbitrary angles from the normal as well as at arbitrary azimuthal angles. Reflection and transmission coefficients are derived from which all propagation characteristics are identified. Highly complex reflection behavior, expressed as phase velocity- frequency dispersion, is observed as a consequence of anisotropy. Extensive comparisons with the concurrently acquired experimental data by Chimenti at the AFWAL on a variety of composite samples have been of unique help in assessing the validity of our theoretical modeling, and its potential application in the nondestructive evaluation of materials. Keywords Fiber reinforced composites.

Author(s):
Nayfeh, Adnan H.
Author Organization(s):
CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING AND ENGINEERING MECHANICS
Descriptive Note:
Final rept. Dec 1985-Dec 1988
Pagination:
0065

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-89-0462
Contract/Grant Number(s):
AFOSR-86-0052
Task Number(s):
A3
Project Number(s):
2306
Monitor Series:
TR-89-0462, AFOSR
 Subject Terms
Joint Capability Areas:
JCA_8.1_Communicate; JCA_8_Building Partnerships; JCA_6_Net Centric; JCA_5_Command and Control; JCA_6.3.3_Spectrum Management; JCA_5.3_Planning; JCA_8.1.1_Inform Domestic and Foreign Audiences; JCA_8.1.3_Influence Adversary and Competitor Audiences; JCA_6.1_Information Transport; JCA_6.3_Net Management; JCA_1_Force Support; JCA_1.3_Human Capital Management; JCA_1.3.2_Personnel Management
Modernization Areas:
Fully Networked C3
Communities of Interest:
Air Platforms
Descriptor(s):
*COMPOSITE STRUCTURES, *ULTRASONIC TESTS, *PLATES, FIBER REINFORCED COMPOSITES, ELASTIC PROPERTIES, ACOUSTIC REFLECTION, WAVE PROPAGATION, ANISOTROPY, ACOUSTIC WAVES, NONDESTRUCTIVE TESTING, FREQUENCY
Field(s)/Group(s):
Laminates and Composite Materials, Test Facilities, Equipment and Methods, Mechanics
Keyword(s):
PE61102F, WUAFOSR2306A3
Report Date:
1989 Mar 24