| Title |
Finite Element Analysis of Lead Rubber Bearing by Using Strain Energy Function of Hyper-Elastic Material |
| Authors |
조성국(Cho, Sung Gook) ; 박웅기(Park, Woong Ki) ; 윤성민(Yun, Sung Min) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.3.0361 |
| Keywords |
면진장치;납고무베어링;초탄성;변형률에너지함수;유한요소모델 Isolation bearing;Lead Rubber Bearing (LRB);Hyper-elastic;Strain energy function;Finite element model |
| Abstract |
The material property of the rubber has been studied in order to improve the reliability of the finite element model of a lead rubber bearing (LRB) which is a typical base isolator. Rubber exhibits elastic behaviour even within the large strain range, unlike the general structural material, and has a hyper-elastic characteristics that shows non-linear relationship between load and deformation. This study represents the mechanical characteristics of the rubber by strain energy function in order to develop a finite element (FE) model of LRB. For the study, several strain energy functions were selected and mechanical properties of the rubber were estimated with the energy functions. A finite element model of LRB has been developed by using material properties of rubber and lead which were identified by stress tests. This study estimated the horizontal and vertical force-displacement relationship with the FE model. The adequacy of the FE model was validated by comparing the analytical results with the experimental data. |