Accession Number : ADA300475

Title :   A Model of Passive Thermal Nondestructive Evaluation of Composite Laminates,

Corporate Author : DELAWARE UNIV NEWARK CENTER FOR COMPOSITE MATERIALS

Personal Author(s) : Charles, John A. ; Wilson, Dale W.

PDF Url : ADA300475

Report Date : MAY 1980

Pagination or Media Count : 35

Abstract : A numerical model of passive thermal nondestructive evaluation of composite laminates was developed. This model, based on a transient, three-dimensional, finite difference solution to the heat conduction equations, can be used to characterize in-plane defects in the laminates and to predict the laminate response to the thermal test. The model was experimentally verified using two material systems. A parametric study was then conducted to ascertain which variables were critical to the success of passive thermal NDE, and how flaw resolution might be improved. jg p.4

Descriptors :   *THERMAL PROPERTIES, *NONDESTRUCTIVE TESTING, *COMPOSITE MATERIALS, *LAMINATES, *PASSIVE SYSTEMS, *FINITE DIFFERENCE THEORY, TEST AND EVALUATION, MATHEMATICAL MODELS, PARAMETRIC ANALYSIS, RESOLUTION, DEFECTS(MATERIALS), RESPONSE, THERMAL CONDUCTIVITY.

Subject Categories : Laminates and Composite Materials
      Numerical Mathematics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE