0

Full Content is available to subscribers

Subscribe/Learn More  >

Strain Limits for the Analysis of the Mechanical Behaviour of Pressurized Components

[+] Author Affiliations
Karl-Heinz Herter, Xaver Schuler, Michael Seidenfuss

University of Stuttgart, Stuttgart, Germany

Paper No. PVP2012-78752, pp. 639-646; 8 pages
doi:10.1115/PVP2012-78752
From:
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5502-7
  • Copyright © 2012 by ASME

abstract

In technical codes and standards the strength assessment of pressurized components and systems is usually performed by limitation of fictitious elastic stresses as well as by limitation of the fatigue level. It shall be proven that the highest stresses resp. stress ranges caused by external loading show a specific margin against the resistance of the material used (concept of stress limitation). This concept is based on the principle that in a component with inhomogeneous stress distribution plastic deformation are allowed at the locations which sustain the highest loads. If in special cases the stress categorization is unclear, the effect of plastic deformation on the mechanical behavior shall be decisive. The same holds for postulated load levels with low occurrence probability (severe accidents) for which the stress limits do not utilize fully the deformation capacity of ductile materials. For that reason solutions that are based on the “Strain Limitation Concept” (SLC) shall be developed. Strength assessment using the concept of strain limitation relies on limiting strains to a specified allowable strain value, i.e. “Limit Strain Curve” (LSC). Within this presentation the approach of the concept of strain limitation is described with a special attention for the determination of the strain limits that can be allowed. With the help of Finite Element damage calculations (Rousselier model) on notched round bars the deformation behavior of an austenitic steel is described until failure. The dependency of the local failure strain on size, stress triaxiality and stress gradients is analyzed. In order to validate the numerical investigation these results are compared with experiments.

Copyright © 2012 by ASME

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