Journal
ACTA ASTRONAUTICA
Volume 127, Issue -, Pages 171-181Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actaastro.2016.05.030
Keywords
Axially functionally graded beam; Thermal effect; Dynamic response; Harmonic load; Timoshenko beam theory; Classical beam theory
Categories
Funding
- National Natural Science Foundation of China [11427802]
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Dynamic response of an axially functionally graded (AFG) beam under thermal environment subjected to a moving harmonic load is investigated within the frameworks of classical beam theory (CBT) and Timoshenko beam theory (TBT). The Lagrange method is employed to derive the equations of thermal buckling for AFG beam, and then with the critical buckling temperature as a parameter the Newmark-beta method is adopted to evaluate the dynamic response of AFG beam under thermal environments. Admissible functions denoting transverse displacement are expressed in simple algebraic polynomial forms. Temperature-dependency of material constituent is considered. The rule of mixture (Voigt model) and Mod-Tanaka (MT) scheme are used to evaluate the beam's effective material properties. A ceramic-metal AFG beam with immovable boundary condition is considered as numerical illustration to show the thermal effects on the dynamic behaviors of the beam subjected to a moving harmonic load. (C) 2016 IAA. Published by Elsevier Ltd. All rights reserved.
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