INVESTIGATION OF NONDESTRUCTIVE METHODS FOR THE EVALUATION OF GRAPHITE MATERIALS
Abstract
A program of investigation was begun in April 1964, to determine nondestructive testing methods and techniques for the evaluation and characterization of graphite materials. The properties and behavior characteristics which are necessary for characterizing graphite as an ablative material for aerospace applications were identified, and applicable NDT methods and techniques were described and theoretically justified. Moreover, the philosophy of Avco's step-wise approach to nondestructive materials evaluation was identified in relation to graphite, and an over-all program plan was established. Correlations between NDT measurements and properties of interest were developed and reported for certain grades of graphite. During the second year, these correlations were extended to other grades and, additionally, have been studied in combination in an effort to obtain qualitative response to behavior characteristics such as erosion rate and thermal shock resistance. To this end, nondestructive test methods for evaluating the performance of graphite under complex thermal and mechanical loading conditions were investigated. The observed response of a molded graphite is compared to theoretical predictions, which are based on the constitutive equations for a transversely isotropic media.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1966
- Accession Number
- AD0801850
Entities
People
- A. W. Schultz
- E. M. Lenoe
- G. E. Lockyer