TY - JOUR
T1 - Elliptical leaf spring shock and vibration mounts with enhanced damping and energy dissipation capabilities using lead spring
AU - Leblouba, Moussa
AU - Altoubat, Salah
AU - Ekhlasur Rahman, Muhammad
AU - Palani Selvaraj, Balaji
N1 - Funding information: This paper is based upon the work supported by the Sustainable Construction Materials and Structural Systems Research Group, University of Sharjah, Sharjah, UAE, and the Ministry of Higher Education (MOHE), Malaysia, under the ERGS Grant Scheme.
PY - 2015/6/9
Y1 - 2015/6/9
N2 - We present an enhancement to the existing elliptical leaf spring (ELS) for improved damping and energy dissipation capabilities. The ELS consists of a high tensile stainless steel elliptical leaf spring with polymer or rubber compound. This device is conceived as a shock and vibration isolator for equipment and lightweight structures. The enhancement to the ELS consists of a lead spring plugged vertically between the leaves (referred to as lead-rubber elliptical leaf spring (LRELS)). The lead is shown to produce hysteretic damping under plastic deformations. The LRELS isolator is shown to exhibit nonlinear hysteretic behavior. In both horizontal directions, the LRELS showed symmetrical rate independent behavior but undergoes stiffening behavior under large displacements. However, in the vertical direction, the LRELS behavior is asymmetric, exhibiting softening behavior in compression and stiffening behavior in tension. Mathematical models based on the Bouc-Wen model, describing the hysteretic behavior of the proposed isolator, are developed and numerically calibrated using a series of finite element analyses. The LRELS is found to be effective in the in-plane and vertical directions. The improved damping and energy dissipation of the LRELS is provided from the hysteretic damping of the lead spring.
AB - We present an enhancement to the existing elliptical leaf spring (ELS) for improved damping and energy dissipation capabilities. The ELS consists of a high tensile stainless steel elliptical leaf spring with polymer or rubber compound. This device is conceived as a shock and vibration isolator for equipment and lightweight structures. The enhancement to the ELS consists of a lead spring plugged vertically between the leaves (referred to as lead-rubber elliptical leaf spring (LRELS)). The lead is shown to produce hysteretic damping under plastic deformations. The LRELS isolator is shown to exhibit nonlinear hysteretic behavior. In both horizontal directions, the LRELS showed symmetrical rate independent behavior but undergoes stiffening behavior under large displacements. However, in the vertical direction, the LRELS behavior is asymmetric, exhibiting softening behavior in compression and stiffening behavior in tension. Mathematical models based on the Bouc-Wen model, describing the hysteretic behavior of the proposed isolator, are developed and numerically calibrated using a series of finite element analyses. The LRELS is found to be effective in the in-plane and vertical directions. The improved damping and energy dissipation of the LRELS is provided from the hysteretic damping of the lead spring.
UR - http://www.scopus.com/inward/record.url?scp=84936804039&partnerID=8YFLogxK
U2 - 10.1155/2015/482063
DO - 10.1155/2015/482063
M3 - Article
AN - SCOPUS:84936804039
SN - 1070-9622
VL - 2015
JO - Shock and Vibration
JF - Shock and Vibration
M1 - 482063
ER -