The Development and Application of Optimisation Technique for the Calibrating of Creep Cavitation Model Based on Cavity Histogram

Qiang Xu, Bilal Rafiq, Xuming Zheng, Joan Lu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

It is generally accepted that the creep rupture is primarily determined by the creep cavitation at grain boundaries, hence it is vital important to develop an accurate cavitation model. Most of the existing creep cavity models used some simplifications such as using average diameter of cavities, assumed nucleation, et al. Recently, the concept of calibrating the creep cavity models using 3D cavity histogram without any aforementioned simplifications was conceived and practical trial and error method was devised and used. Whilst the use of such trial and error method had produced results, arguably very accurate too, but its use heavily relies on the user’s insight knowledge of the characteristics of the cavity density distribution function and intervention. Here, we present the development and application of optimisation techniques for the calibration of creep cavitation model using Excel Solver, via the minimising the difference of the predicted cavity distribution density (number of cavities per volume) over cavity size and the experimental measured one. Its application produces an updated creep cavitation model without any suspicions doubt of its mathematical accuracy. We anticipate this optimisation implementation via Excel Solver will be widely used in future.
Original languageEnglish
Title of host publicationCreep in Structures VI
Subtitle of host publicationIUTAM Symposium Proceedings
EditorsHolm Altenbach, Konstantin Naumenko
PublisherSpringer, Cham
Chapter18
Pages309-320
Number of pages12
VolumeSTRUCTMAT 194
Edition1st
ISBN (Electronic)9783031390708
ISBN (Print)9783031390692, 9783031390722
DOIs
Publication statusPublished - 5 Aug 2023
EventIUTAM Symposium Creep in Structures - Magdeburg, Germany
Duration: 18 Sep 202322 Sep 2023
https://www.iutam-symposium.ovgu.de/

Publication series

NameAdvanced Structured Materials
PublisherSpringer
VolumeSTRUCTMAT 194
ISSN (Print)1869-8433
ISSN (Electronic)1869-8441

Conference

ConferenceIUTAM Symposium Creep in Structures
Country/TerritoryGermany
CityMagdeburg
Period18/09/2322/09/23
Internet address

Cite this