Dynamic thermal stress creep buckling, probabilistic failures and survival times of viscoelastic columns with follower loads

Harry H. Hilton

Research output: Contribution to journalConference articlepeer-review

Abstract

The influence of temperatures on viscoelastic energy dissipation is investigated. While dissipation may help retard creep buckling the associated presence of thermal stresses can be detrimental to material failures and thus shorten column lifetimes. Analytical results indicate that large deflection linearly viscoelastic columns with quasi-static follower and thermal loads under quasi-static conditions exhibit smaller deflections, smaller probabilities of failure and longer survival times than identical columns under the same loads but with dynamic effects caused solely by vis-coelastic creep. Column end shortening due to both curvature, and external and thermal loads is also taken into account and the governing coupled nonlinear differential equations are solved numerically. The effects of end shortening on elastic and viscoelastic columns are discussed. Probabilistic column survivability due to creep buckling and material failure (delamination) are examined in detail.

Original languageEnglish (US)
Pages (from-to)4242-4260
Number of pages19
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume6
DOIs
StatePublished - 2005
Event46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Austin, TX, United States
Duration: Apr 18 2005Apr 21 2005

Keywords

  • Buckling
  • Columns
  • Creep
  • Delamination
  • Failure probabilities
  • Follower loads
  • Large deformations
  • Material damping
  • Survival times
  • Thermal stresses
  • Viscoelasticity

ASJC Scopus subject areas

  • Architecture
  • General Materials Science
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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