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Tailoring a bidirectional negative stiffness (BNS) structure with mechanical diodes for mechanical metamaterial structures

Title
Tailoring a bidirectional negative stiffness (BNS) structure with mechanical diodes for mechanical metamaterial structures
Author
윤길호
Keywords
meta-material; negative spring; mechanical diode; bi-stable mechanism
Issue Date
2017-04
Publisher
IOP PUBLISHING LTD
Citation
SMART MATERIALS AND STRUCTURES, v. 26, no. 5, Article no. 055002
Abstract
A new structure with a bidirectional negative stiffness (BNS) value utilizing buckling phenomena (often called bi-stable or snap-through) and a mechanical diode are presented with regard to mechanical metamaterial applications. The need for cost and mass efficient vibration isolation parts within the modern aerospace, automotive, and civil industries has been the subject of many interesting studies in the last several decades. With conventional materials in nature, many innovative approaches have been proposed, but with some limitations for vibration suppression. To cope with these difficulties, it was possible to employ a man-made material with a negative density or negative stiffness, not existing in nature. Recently metamaterials, i.e., man-made repeating structures with negative densities or/and stiffness values, have been proposed and their applications have been reported. This research presents a new man-made structure with a BNS, using the help of bi-stable mechanisms and a mechanical diode. With regard to the metamaterial application of this phenomenon, the dispersion nature of a 1D bi-stable mechanism has been studied and a new novel structure having BNS with a mechanical diode is presented. The effects of states of snap-through were highlighted and quantified experimentally.
URI
https://iopscience.iop.org/article/10.1088/1361-665X/aa65bfhttps://repository.hanyang.ac.kr/handle/20.500.11754/113763
ISSN
0964-1726; 1361-665X
DOI
10.1088/1361-665X/aa65bf
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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