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 language | English (US) |
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Pages (from-to) | 4242-4260 |
Number of pages | 19 |
Journal | Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference |
Volume | 6 |
DOIs | |
State | Published - 2005 |
Event | 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Austin, TX, United States Duration: Apr 18 2005 → Apr 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