Analysis of nonlinearly viscoelastic behavior of adhesive bonds

O. K. Parikh*, Jan Drewes Achenbach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The purpose of this paper is to provide a theoretical framework to study the nonlinear viscoelastic behavior of adhesive layers. The stress-strain behavior of the adhesive material in shear is assumed to have a nonlinear elastic part and a linear viscoelastic part, i.e., σyx=f(εyx)+Kmεyx. To measure f(εyx) and Km by an ultrasonic technique, it is proposed to prestress the adhesive layer in the nonlinear range and to superimpose a small amplitude ultrasonic signal. The reflected field is used to obtain the wave speed and hence df(εyx)/dεyx as a function of the pre-stress. The viscoelastic parameter is obtained from the amplitude decay. By repeating this procedure for various values of prestress and using numerical integration, the stress-strain behavior of the adhesive layer can be reconstructed.

Original languageEnglish (US)
Pages (from-to)221-226
Number of pages6
JournalJournal of Nondestructive Evaluation
Volume11
Issue number3-4
DOIs
StatePublished - Dec 1 1992

Keywords

  • Nonlinear viscoelastic behavior
  • adhesive layers
  • ultrasonics

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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