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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Metal Spatial Structures

Influence of spatial autocorrelation length of corroded thin-walled member thickness on ultimate compressive strength

< Table of Contents for Metal Spatial Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Metal Spatial Structures
  • Pages: 10
  • Title: Influence of spatial autocorrelation length of corroded thin-walled member thickness on ultimate compressive strength
  • Author(s): Naohiko Watanabe, Masato Suzaki, Masafumi Tanaka
  • Keywords: corroded plate, variogram, Gaussian random field, autocorrelation
Abstract
This study investigated the relationship between the characteristics of the thickness distribution of a corroded plate and the ultimate compressive strength using an elastic-plastic finite element analysis. In this analysis, we used a simulation model following a Gaussian random field with a specific autocorrelation length for each case. Parametric analyses showed that the ultimate strength of the plate had a linear declining trend with increase in the autocorrelation length in such a way that the length was less than the specific value. Next, the effects of the initial deflection and the eccentricity on ultimate strength of corroded plate were investigated. A method for estimating the ultimate compressive strength using the concept of 'observed area' with a specific width was considered. We found that almost all the local plastic deformations occurred in the region having this specific length.

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