0

Full Content is available to subscribers

Subscribe/Learn More  >

Specimen Design for Creep Characterization Under Multiaxial Stress

[+] Author Affiliations
Douglas L. Marriott, Peter Carter

Stress Engineering Services, Mason, OH

Paper No. PVP2005-71419, pp. 453-461; 9 pages
doi:10.1115/PVP2005-71419
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4191-X | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

This paper describes part of an ongoing study to develop a simple tensile test which will maximize the effects of hydrostatic constraint. The test for such purposes is the notched bar test. Two notch geometries are in common use, the ASTM Standard notch, and the Bridgman blunt notch. Both of these tests have shortcomings, which are described in the paper. Alternative geometries, including notches, plane strain holes and slots have been evaluated, using the ratio of hydrostatic stress to Mises stress in a bar made of an elastic, perfectly plastic material. Examples are given of the stress evolution in selected geometries under creep according to a simple Bailey/Norton power law model, and comparison is made with the behavior when a more complex material constitutive law is used, which includes continuum creep damage. The model used in this case is a simplified version of the MPC Omega model, described in API 579 [1]. Since creep calculations involving damage are both computationally intensive and difficult to carry to completion due to numerical convergence problems, approximate methods of predicting specimen behavior under such complex material conditions is being explored. One promising method, based on isochronous stress/strain curves is described and the results compared with detailed predictions using a more accurate constitutive model.

Copyright © 2005 by ASME
Topics: Creep , Stress , Design

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In