ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
As a new damping material, the authors first developed a Zn-22wt.%-Al eutectoid alloywith ultra-fine grains exhibiting superplasticity at room temperature by means of thermomechanicalcontrolling processes (TMCPs). The Zn-Al alloy has a few advantages such as lowwork-hardening rate and high ductility over a conventional seismic damping material, for instance, alow-yield-point steel. In addition, Zn-Al alloys are environment-conscious because of no harmfulmetal like Pb. However, when Zn-Al alloys are subjected to plastic deformation, since its workhardening is small, plastic deformation proceeds locally so that required absorption energy cannotbe 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 ashear panel type, a brace type damper for tall buildings and a bending type damper for Japanesewooden houses using FEM analysis in order to minimize localized strain and local deformation andto determine the optimum shape for this Zn-Al superplastic seismic damper. As a result, anecological and high-energy absorption seismic dampers, so-called “maintenance-free seismicdamper,” was successfully developed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.551-552.583.pdf
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