Accession Number : ADA258684


Title :   Acoustic Wave Propagation in an Adhesive Bond Model with Degrading Interfacial Layers


Descriptive Note : Final rept.


Corporate Author : ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB


Personal Author(s) : Anastasi, Robert F ; Roberts, Mark J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258684.pdf


Report Date : Sep 1992


Pagination or Media Count : 30


Abstract : This report discusses analytical and numerical approaches for the theoretical analysis of adhesively bonded structures having various bondline quality levels. Since the adhesive strength of an adhesively bonded structure is the critical failure problem of a bond under small loads, the discussions in this paper concentrate on mathematical models which use interfacial layers between the adherend and adhesive layers as a means to show various degrees of bond quality. The analytical method discussed is a reflection coefficient calculation for multilayered structures in the frequency domain. The numerical approach used is the finite element method yielding time domain results for adhesively bonded structures having various interfacial layer conditions. Direct comparisons between the two methods are accomplished in the frequency domain, the time domain results obtained via the finite element method being appropriately Fast Fourier Transformed (FFT).


Descriptors :   *PROPAGATION , *MODELS , *LAYERS , *ADHESIVE BONDING , *ACOUSTIC WAVES , MATHEMATICAL MODELS , FREQUENCY , FINITE ELEMENT ANALYSIS , COMPARISON , ADHESION , STRUCTURES , NUMERICAL ANALYSIS , FAILURE , REFLECTION , QUALITY , WAVE PROPAGATION , COEFFICIENTS , ACOUSTICS , APPROACH , BONDING , TIME DOMAIN , FREQUENCY DOMAIN , ADHESIVES , COHESION


Subject Categories : Physical Chemistry
      Adhesives, Seals and Binders
      Couplers, Fasteners, and Joints
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE