University of Illinois Urbana-Champaign

High temperature vacuum axial fatigue testing machine

Stephens, R.I.; Sinclair, G.M.

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https://hdl.handle.net/2142/111869

Description

Title
High temperature vacuum axial fatigue testing machine
Author(s)
  • Stephens, R.I.
  • Sinclair, G.M.
Issue Date
1960-03
Keyword(s)
Fatigue Testing
Abstract
This paper describes fatigue equipment which was developed to test thin-walled refractory metal specimens in a vacuum under repeated axial loading at temperatures up to 2100°F. The machine is of the constant displacement type and incorporates an eccentric and crank mechanism which allows the alternating stress, mean stress, and frequency of cycling to be varied. The stresses in the specimens are easily calculated from σ = P/A, where P is the axial load measured by a ring dynamometer and A is the cross-sectional area of the specimen. The test specimen is uniquely heated by placing a tungsten heating element inside the thin-walled tubular specimens. The evacuated test chamber is completely visible through the use of a pyrex bell jar seated on an O-ring seal. Axial motion is transmitted into the vacuum chamber through a copper alloy bellows. Preliminary results of fatigue tests on commercially pure arc-cast molybdenum specimens subjected to fully reversed stresses at 1700°F and 875 cpm, are included in this paper.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 160
  • 1967-0456
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/111869
Sponsor(s)/Grant Number(s)
Atomic Energy Commission, Contract No. AT (11-1)-67, Project 20
Copyright and License Information
Copyright 1960 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.