The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Damping, Elasticity, And Fatigue Properties Of Temperature-Resistant Materials

Report Number: WADC TR 52-243
Author: Lazan, B. J.
Author: Demer, L. J.
Corporate Author: Syracuse University
Laboratory: Materials Laboratory
Date of Publication: 1952-01
Pages: 42
Contract: AF 33(038)-18903
Project: None Given
PB Number: PB116824
AD Number: AD0002128
Original AD Number: 2128

Rotating-cantilever beam fatigue-testing equipment was used to obtain the damping, elasticity, and fatigue properties of S816, TP-2-R, TP-2B, type 403, TP-1-2, TP-1-3, Inconel-X, and low-carbon N-155 alloys at room and various elevated temperatures and engineering stress levels. The data were utilized to investigate the changes in damping energy and dynamic modulus of elasticity with temperature in constant cyclic stress fatigue tests. Curves of the stresses vs the numbers of cycles are presented in addition to a series of new diagrams designed to show the effects of both stress magnitude and stress history on the damping and elasticity properties. Two methods for comparing the damping energies of a group of materials are discussed, and diagrams are presented to permit comparisons of the elasticity properties among materials tested at given temperatures. For all the materials and at all the temperatures investigated, the energy dissipated by damping increased rapidly with stress at values close to the fatigue strength of a material. During a constant reversed cyclic stress test, the damping energy decreased, remained the same, increased, or had a varying pattern as the number of stress cycles was increased. The changes in dynamic modulus of elasticity were generally reciprocal to the changes in damping energy.

Download this report

(PDF, 6.65 MB, 42 pages)

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
The NTIS Order Number for this report is: AD002128
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
A PB Number, PB116824 , exists for this report, indicating public availability of the report at time of publication

An index contemporary to the publication of this report suggests its public availability
This report has been indexed in U.S. Government Research Reports, vol. 23, no. 5, p.173, 5/20/1955
You may view this report's index entry
There has been no verification of an indication of public availability from an inside cover statement