This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Choi, S. Articles by Lee, D. C. Search for Related Content Social Bookmarking                         What's this?

Thermal Buckling of Laminated Composite Beams with Embedded Shape Memory Alloy Actuators

Agency for Defense Development, P.O. Box 35, Yusung-gu, Taejon, 305-600 Korea

Jung Ju Lee

Department of Mechanical Engineering, ME3033, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, Taejon, 305-701, South Korea, jjlee{at}sorak.kaist.ac.kr

Dong Chun Lee

Department of Mechanical Engineering, ME3033, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, Taejon, 305-701, South Korea

In this paper, the thermal buckling and postbuckling behaviours of a composite beam with embedded shape memory alloy (SMA) wires are investigated experimentally and analytically. For the purpose of enhancing the critical buckling temperature and reduction of the lateral deflection on thermal buckling and postbuckling, the characteristics of thermal buckling are investigated through the use of the shape recovery force. The results of thermal buckling tests using uniformly heated and clamped composite beam specimens with embedded SMA wire actuators are discussed. The temperature-load-deflection behaviour records present quantitatively how the shape recovery force affects the thermal buckling behaviour. For this experiment, we considered the initial geometric imperfections, the slenderness ratio of the beam and the embedding position of the SMA wire actuators. The experimental results show that the shape recovery force reduces the thermal expansion of the composite laminated beam. This results in an increase of the critical buckling temperature and a reduction of the lateral deflection of the beams.

Key Words: thermal buckling and postbuckling • shape recovery force • cut and paste method • cross tangential method • critical bucking temperature

Journal of Composite Materials, Vol. 34, No. 18, 1529-1547 (2000)
DOI: 10.1106/GXXU-BEVY-D4U0-FY5F


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?