Postbuckling characteristics of the short superelastic shape memory alloy columns- experiment and quantitative analysis

• Autorzy: Rahman M. A. , Tani J.
• Języki publikacji: EN

Abstrakty

EN

A few unique buckling and postbuckling characteristics of short superelastic shape memory alloy (SMA) columns are observed experimentally and explained in terms of numerical simulation. Interestingly, it is found from the load-deformation curves that during compression the SMA column with slenderness ratio of 38 exhibits two distinct buckling loads, the other one being higher, completely contrary to the general notion that load falls off monotonously for all columns in the postbuckling region. Similarly, for of 28, the SMA column can sustain a significantly high load after a distinct change in the mode of deformation. Based on the large deformation theory as well as the nonlinear stress-strain relations, the load-deformation curves of the short SMA columns have been predicted by using the FEM code ANSYS. Precise and quantitative analyses of these results verify the fact that the SMA column's behavior can be attributed to the special nature of the stress-strain curves.

Słowa kluczowe

EN

short SMA columns; two modes of deformation; two peak loads; physical nonlinearity; geometrical nonlinearity

PL

odkształcenia plastyczne; materiały plastyczne

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2006
• Tom: Vol. 11, no 4
• Strony: 941--955
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Rahman M. A.

autor

Tani J.

• Department of Mechanical Engineering Bangladesh University of Engineering & Technology Dhaka 1000, BANGLADESH,

Bibliografia

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• Rahman M.A., Qiu. J. and Tani. J. (2005): Buckling and postbuckling characteristics of the superelastic SMA columns- Numerical Simulation. - Journal of Intelligent Material Systems & Structures, vol.16, pp.691-702.
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• Urushiyama Y., Lewinnek D., Qiu J. and Tani J. (2000): Buckling of curved column and twinning deformation. - Abstracts of the IUTAM Symposium on Smart Structures and Structonic Systems, pp.38-39.