Paper Titles
Rheological Analogies of Superplastic and Viscous-Plastic Materials Flow
p.553
Homogeneous Flow of In Situ Bulk Metallic Glass Matrix Composite
p.561
Deformation Behavior of Zr-Based Metallic Glass and Microforming of Microgears
p.569
Gas Pressure Forming of Amorphous Fe78Si9B13 Alloy
p.575
Application of High-Strain-Rate Superplastic Zn-Al Alloy to Seismic Dampers and its Optimised Shape Design
p.583
Low Temperature Superplasticity of Titanium Alloy Processed by Thermohydrogen Treatment
p.591
Superplastic Flow of Silicon Nitride-Based Nanocomposite at High Strain Rates
p.597
Low Temperature Superplasticity and Intragranular Misorientation in Severely Rolled Sheets of Al-4.5%Mg-0.7%Mn Based Alloys
p.601
Superplasticity of Nanostructured Nickel Alloy and Composite Fabricated by Electrodeposition
p.607

Application of High-Strain-Rate Superplastic Zn-Al Alloy to Seismic Dampers and its Optimised Shape Design

Article Preview

Abstract:

As a new damping material, the authors first developed a Zn-22wt.%-Al eutectoid alloy with ultra-fine grains exhibiting superplasticity at room temperature by means of thermomechanical controlling processes (TMCPs). The Zn-Al alloy has a few advantages such as low work-hardening rate and high ductility over a conventional seismic damping material, for instance, a low-yield-point steel. In addition, Zn-Al alloys are environment-conscious because of no harmful metal like Pb. However, when Zn-Al alloys are subjected to plastic deformation, since its work hardening is small, plastic deformation proceeds locally so that required absorption energy cannot be sufficiently obtained, and local fracture and local deformation instability can take place easily, which is the intrinsic characteristic of superplastic materials. Therefore we attempted to develop a shear panel type, a brace type damper for tall buildings and a bending type damper for Japanese wooden houses using FEM analysis in order to minimize localized strain and local deformation and to determine the optimum shape for this Zn-Al superplastic seismic damper. As a result, an ecological and high-energy absorption seismic dampers, so-called “maintenance-free seismic damper,” was successfully developed.

You might also be interested in these eBooks
Superplasticity in Advanced Materials - ICSAM 2006 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 551-552)

Pages:

583-590

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.583

Citation:

Cite this paper

Online since:

July 2007

Authors:

Atsumichi Kushibe, Yorinobu Takigawa, Kenji Higashi, Kazuo Aoki, Koichi Makii, Toshiaki Takagi

Keywords:

Maintenance-Free, Seismic Damper, Superplasticity, Thermo-Mechanical Control Process (TMCP), Zn-Al Alloy

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Somekawa et al. : Proceedings of Architectural Institute of Japan , Vol. 3 (1999), p.871.

Google Scholar

[2] Iwata et al.: Proceedings of Architectural Institute of Japan, Vol. 3 (1999), p.937.

Google Scholar

[3] K. Tanaka et al.: Journal of Struct Constr. Eng. , No. 509, (1998), p.159.

Google Scholar

[4] K. Ohi et al.: Journal of Struct Constr. Eng. , No. 538 , Dec. 2000 , p.171.

Google Scholar

[5] Y. Nakata et al.: Symposium Proceedings of Passive Controlled Structure(2001) , p.87.

Google Scholar

[6] Y. Motohashi et al.: Journal of Japan Institute of Light Metals, Vol. 30, No. 11 (1980), p.634.

Google Scholar

[7] R. S. Mishra et al.: Nano-structure Mat. Vol. 9, No. 1/8 (1997), p.473.

Google Scholar

[8] M. Furukawa et al.: Mat. Res., Vol. 11, No. 9 (1996), p.2128.

Google Scholar

[9] G. Toress-Villasenor et al. : Mat. Sci. Forum, Vol. 243/245 (1997), p.553.

Google Scholar

[10] H. Ueda et al.: Journal of JSME C, Vol. 68, No. 672(2002), p.2332.

Google Scholar

[11] T. Tanaka et al.: International Journal of Mechanical Sciences 45 (2003).

Google Scholar