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Title: Systems and methods for determining strength of cylindrical structures by internal pressure loading

In one embodiment, an apparatus, includes: a mandrel; an expansion cylinder, comprising: opposite first and second ends; an inner circumferential surface extending between the ends and characterized by an inner diameter, the inner circumferential surface defining a hollow cavity; an outer circumferential surface extending between the ends and characterized by an outer diameter that is greater than the inner diameter; and a plurality of slots extending from the inner circumferential surface to the outer circumferential surface and latitudinally oriented between the ends; and one or more base plates configured to engage one of the ends of the expansion cylinder. In another embodiment, a method includes: arranging an expansion cylinder inside a test cylinder; arranging a mandrel inside the expansion cylinder; applying a force to the mandrel for exerting a radial force on the expansion cylinder; and detecting one or more indicia of structural failure of the test cylinder.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1207245
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA) LLNL
Patent Number(s):
9,097,602
Application Number:
13/748,443
Contract Number:
AC52-07NA27344
Resource Relation:
Patent File Date: 2013 Jan 23
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Other works cited in this record:

Measurement of residual stresses in thick composite cylinders by the radial-cut-cylinder-bending method
journal, February 2007

Thick-walled composite cylinders with optimal fiber prestress
journal, January 1996

A closed-form solution for the internal stresses in thick composite cylinders induced by cyclical environmental conditions
journal, October 2002

Response of thick composite rings under uniform external pressure
journal, January 1995

Aspects of residual thermal stresses in continuous-fibre-reinforced ceramic matrix composites
journal, January 1993
  • Powell, K. L.; Smith, P. A.; Yeomans, J. A.
  • Composites Science and Technology, Vol. 47, Issue 4, p. 359-367
  • DOI: 10.1016/0266-3538(93)90005-2

On the buckling and collapse of moderately thick composite cylinders under hydrostatic pressure
journal, January 1997

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