Accession Number:

ADA300475

Title:

A Model of Passive Thermal Nondestructive Evaluation of Composite Laminates,

Descriptive Note:

Corporate Author:

DELAWARE UNIV NEWARK CENTER FOR COMPOSITE MATERIALS

Personal Author(s):

• Charles, John A.
• Wilson, Dale W.

Report Date:

1980-05-01

Pagination or Media Count:

35.0

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