Accession Number:

ADA237471

Title:

Development of a Mixture for Nonlinear Wave Propagation in Fiber- Reinforced Composites.

Descriptive Note:

Final rept. 1 Feb 87-30 Jun 89,

Corporate Author:

CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF APPLIED MECHANICS AND ENGINEERING SCIENCES

Report Date:

1991-05-31

Pagination or Media Count:

40.0

Abstract:

A method for constructing dispersive, nonlinear mixture models for unidirectionally fiber-reinforced composites is described herein. System nonlinearities in the treated example result from nonlinear material properties of the constituents. The proposed model is a nonlinear generalization of the linear model developed by Murakami and Hegemier 1986 for elastic constituents. Model construction is based upon a homogenization technique which employs multivariable asymptotic expansions in conjunction with certain weighted residual procedures. The methodology furnishes the equations of motion, the appropriate initial and boundary conditions, and a set of consistent rate constitutive relations. Model validation for linear and non linear dynamic responses is accomplished by comparing predicted results for waveguide and wave- reflect problems with the available experimental data or the data obtained by use of a detailed finite element FE analysis.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE