Accession Number : AD0752317

Title :   Damping in Porcelain Enamel Coatings.

Descriptive Note : Summary technical rept. Jun 69-Jun 71,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF AERONAUTICS AND ENGINEERING MECHANICS

Personal Author(s) : Sridharan,Prabha ; Plunkett,Robert

Report Date : JUL 1972

Pagination or Media Count : 79

Abstract : Porcelain enamels are extensively used as protective and decorative coatings for metal parts. This report describes a study of the damping capability of these coatings at elevated temperatures. A maximum loss coefficient of .04 was observed for a bending specimen of mean thickness 0.09 inches, with a .0055 inch thick porcelain enamel coating. Experimental data showing the dependence of damping on temperature, coating thickness and frequency is presented. A method for determining the complex elastic modulus of the coating material is discussed. Results from bending and torsion experiments are compared. (Author)

Descriptors :   (*CERAMIC COATINGS, DAMPING), (*PROTECTIVE TREATMENTS, THERMAL PROPERTIES), VIBRATION, RHEOLOGY, MODULUS OF ELASTICITY, RESONANT FREQUENCY, STRESSES, THERMAL ANALYSIS, NUMERICAL ANALYSIS

Subject Categories : Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE