An analytical study on SMA beam-column actuators for anti-buckling phenomenon
- Authors
- Ostadrahimi, Alireza; Taheri-Behrooz, Fathollah; Choi, Eunsoo; Li, Guoqiang
- Issue Date
- 1-Jun-2024
- Publisher
- Elsevier Ltd
- Keywords
- Actuators; Anti-buckling; Beam-column; Shape memory alloy
- Citation
- International Journal of Solids and Structures, v.295
- Journal Title
- International Journal of Solids and Structures
- Volume
- 295
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/33063
- DOI
- 10.1016/j.ijsolstr.2024.112792
- ISSN
- 0020-7683
1879-2146
- Abstract
- The present paper focuses on studying the anti-buckling behavior of prismatic martensitic shape memory alloy (SMA) beam-columns. It combines analytical and semi-analytical approaches to investigate the process of column straightening for anti-buckling. We try to comprehensively describe this phenomenon and develop a mathematical model to formulate each step of the anti-buckling problem. Due to the complex stress–strain behavior of SMA material, nine different stages of stress-height diagrams may potentially occur during this effect; thus, for facilitating the design process of SMA structures, corresponding forces and moments to each stage, are analytically derived. Our demonstration establishes that the primary cause of beam-column straightening is not the uniformity of stress, but rather the achievement of uniform strain across all fibers of the cross-section. This uniform strain distribution implies that the curvature of the beam-column diminishes to zero. © 2024 Elsevier Ltd
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