On polymorphic uncertainty modeling in shell buckling

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Marc Fina - , Karlsruhe Institute of Technology (Author)
  • Werner Wagner - , Karlsruhe Institute of Technology (Author)
  • Wolfgang Graf - , Chair of Structural Analysis (Author)

Abstract

Buckling is typically the governing failure mode of thin-walled shells. In particular, geometric and material imperfections have a major influence on the buckling behavior. Small variations of imperfections have large effects on the load-bearing behavior. However, the design of shells is still characterized by a deterministic way of thinking, in which uncertainties have not yet been sufficiently considered. Even in probabilistic approaches, false assumptions are often generated due to the small amount of experimental data. The focus of this paper is an appropriate uncertainty quantification based on the available data. Therefore, the concept of polymorphic uncertainty modeling is presented on axially loaded shells with different types of imperfections. Finally, an idea for a novel design concept for shells based on a fuzzy-valued safety level is introduced. The paper is intended to initiate a rethinking of the methodology for the numerical design of shells with an appropriate uncertainty quantification.

Details

Original languageEnglish
Pages (from-to)2632-2647
Number of pages16
JournalComputer-Aided Civil and Infrastructure Engineering
Volume38(2023)
Issue number18
Publication statusPublished - 9 Jun 2023
Peer-reviewedYes

External IDs

WOS 001004642200001
Scopus 85161674252

Keywords

Keywords

  • Geometric imperfections, Structural-analysis, Behavior