Volume 10, Issue 2 (2010)                   IQBQ 2010, 10(2): 0-0 | Back to browse issues page

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Izadi Zaman Abadi1 E, .Nateghi-Alahi F, Motamedi M. Comparison of Accordion Metallic Dampers with Filled Accordion Metallic Dampers Using Polymeric Foam under Axial Cyclic Loading. IQBQ. 2010; 10 (2)
URL: http://journals.modares.ac.ir/article-16-921-en.html
Abstract:   (2689 Views)
During the last decades, many researches have been carried out on development of supplemental passive energy absorption devices especially hysteretic metallic dampers and different types of them with different capacities and potentials have been developed. The idea of buckling of thin-walled tubes and the use of this property was led to develop an accordion metallic damper (AMD) [Motamedi, Nateghi-Alahi-2007]. This damper utilizes the capability of accordion thin-walled tube for excitation of axisymmetric concertina buckling mode as a damping mechanism which in turn increases the amount of dissipated energy. In this paper filled accordion metallic damper (FAMD) is suggested and analytically and experimentally the behavior of AMD's and FAMD's under axial cyclic loading are investigated and compared. For this purpose, Firstly analytical studies based on Finite element method and nonlinear dynamic analysis was performed on FAMD's for the determination of the approximate preliminary specifications of different polymers for potential use. After specifying the preliminary material properties, 4 specimens include 2 FAMD's filled by polymeric foam and 2 AMD's were subjected to dynamic tension and compression actuator and the effect of filling AMD's by this polymeric foam on the some of important specifications of damper studied and try to use this method for improving and developing of AMD's. Based on the results obtained using the appropriate filling inside the AMD's is a suitable technique for the purpose of improvement the some of important specifications such as the number of cycles before failure, amount of dissipated energy and plastic capacity. The effect of interaction between foam and accordion thin walled tubes play an important role for this purpose especially in low capacity AMD's.
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Received: 2007/12/5 | Accepted: 2008/12/4 | Published: 2011/03/5

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