University of Illinois Urbana-Champaign

Overstraining of medium carbon steel thick walled cylinders

Steele, M.C.; Eichberger, L.C.

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https://hdl.handle.net/2142/112595

Description

Title
Overstraining of medium carbon steel thick walled cylinders
Author(s)
  • Steele, M.C.
  • Eichberger, L.C.
Issue Date
1955-04
Keyword(s)
  • Strain
  • Steel
Abstract
Experimental results are presented on the behavior of four medium-carbon steel cylinders (6 in. O.D. x 3 in. I.D. x 8 in. long) overstrained by internal pressure. Particular attention is given to the mechanism of yielding and the associated strains measured at the various locations on the bore and outside surfaces. The yield mechanism consists of the propagation through the cylinder walls of a finite number of Lueders’ lines. Initiation of yield requires a maximum shear stress higher than that found from the lower yield in a tension test. Lueders’ line patterns are asymmetrical but follow closely the maximum shear stress trajectories. Creep or slow yielding is a feature of the mechanism. Full yield in the cylinders is accompanied by an increase in the number and width of Lueders’ lines and corresponding increases in circumferential strains. The non-homogeneous mechanism of yielding is reflected by variations in strain circumferentially. Average bore and outside diameter circumferential strains compare favorably with theories due to Thomas and Koiter. Axial strains are essentially elastic in keeping with Koiter but in marked disagreement with Thomas. Circumferential strains exhibit significant creep. A comparison is given between the Lueders’ line patterns in mild steel and medium-carbon steel cylinders.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 83
  • 1967-0379
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112595
Sponsor(s)/Grant Number(s)
Office of Ordnance Research, Ordnance Corps, Department of the Army, Contract No. DA-11-022-ORD-1527, ORD Project TB2-0001(1070)
Copyright and License Information
Copyright 1955 Board of Trustees of the University of Illinois

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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.