Comparison of methods to find the Weibull stress parameters

O.J. Coppejans, Carey Walters

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

The Weibull stress (Beremin, 1983) relates the local first principal stress and plastically strained volume to the probability of fracture. It requires two constants (m, σu) as input, which are generally regarded as material parameters. As the Beremin approach is used in the background to structural analysis rules, the Beremin parameters are now being used in other situations, including engineering analysis. However, the currently accepted way to find the Beremin constants requires twenty tests, which is considered to be unacceptably expensive for industrial application. Less expensive ways of finding the Beremin parameters have been published in the literature, but they have never been compared to the de facto standard. In this paper, the Beremin parameters were found by the de facto standard method and two other ways, and a comparison is made. It was found that the Beremin parameters can be estimated with reasonable accuracy with a method that uses on just two sets (six specimens) of fracture specimens by careful application of the method of Andrieu (2012). Also, a proposal is made for another method which is based only on the Master Curve temperature T0.
Original languageEnglish
Title of host publicationProceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering - OMAE2018
Subtitle of host publicationVolume 3: Structures, Safety, and Reliability
EditorsA. Souto-Iglesias
Place of PublicationNew York, NY, USA
PublisherASME
Number of pages12
ISBN (Print) 978-0-7918-5122-7
DOIs
Publication statusPublished - 2018
EventOMAE 2018: 37th International Conference on Ocean, Offshore & Arctic Engineering - Madrid, Spain
Duration: 17 Jun 201822 Jun 2018
https://www.asme.org/events/omae

Conference

ConferenceOMAE 2018
Abbreviated titleOMAE 2018
CountrySpain
CityMadrid
Period17/06/1822/06/18
Internet address

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  • Cite this

    Coppejans, O. J., & Walters, C. (2018). Comparison of methods to find the Weibull stress parameters. In A. Souto-Iglesias (Ed.), Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering - OMAE2018: Volume 3: Structures, Safety, and Reliability [OMAE2018-77038] ASME. https://doi.org/10.1115/OMAE2018-77038