Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment
The most important item when indicating the mechanical properties of offshore elastomeric bearings is the shear modulus, and the method of measuring this is shown in EN 1337-3, a regulation related to offshore elastomeric bearings. In this work, we conducted an experimental and numerical study on an...
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MDPI AG
2021-05-01
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| author | Dongseop Han Wooseong Che |
| author_facet | Dongseop Han Wooseong Che |
| author_sort | Dongseop Han |
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| description | The most important item when indicating the mechanical properties of offshore elastomeric bearings is the shear modulus, and the method of measuring this is shown in EN 1337-3, a regulation related to offshore elastomeric bearings. In this work, we conducted an experimental and numerical study on an offshore elastomeric bearing to find its shear modulus. Shear modulus tests were conducted according to the procedure specified in EN 1337-3 Annex F, while simulations were performed using the finite element analysis (FEA) software, ANSYS. The main objective of this research work is to determine optimum analysis conditions for the simulation method that considers a nonlinear model for the elastomer material and predicts the experimental results accurately. We considered the Mooney–Rivlin (M-R) model that has two-parameter (2P), five-parameter (5P), and nine-parameter (9P) forms, depending on the number of terms in the series. We observed that the load-displacement graph is linear, and the percentage error between the results obtained with 2P and 5P M-R models is around 2.23% in the compression and 0.38% in the shear. The simulation results from 2P M-R model showed a good agreement with the experimental results with the correlation coefficient (R2) being 0.999 with an average error of about 2%. However, the deviation between the experimental and simulation results from the 9P M-R model is very high, with about 7%. Based on this study, we can say that the 2P M-R model can accurately predict the nonlinear behavior of hyperelastic material used in elastomer bearing. In addition, the shear modulus of elastic bearings for Class 3 Shore hardness was verified by comparing the numerical simulation values with those presented in EN 1337-3 Annex D. |
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| spelling | doaj.art-bc1cc0fc97a345da947dd8e12ce467a82023-11-21T19:20:43ZengMDPI AGApplied Sciences2076-34172021-05-011110438410.3390/app11104384Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and ExperimentDongseop Han0Wooseong Che1Department of Mechanical Engineering, Dong-A University, Busan 49315, KoreaDepartment of Mechatronics Engineering, Kyungsung University, Busan 48434, KoreaThe most important item when indicating the mechanical properties of offshore elastomeric bearings is the shear modulus, and the method of measuring this is shown in EN 1337-3, a regulation related to offshore elastomeric bearings. In this work, we conducted an experimental and numerical study on an offshore elastomeric bearing to find its shear modulus. Shear modulus tests were conducted according to the procedure specified in EN 1337-3 Annex F, while simulations were performed using the finite element analysis (FEA) software, ANSYS. The main objective of this research work is to determine optimum analysis conditions for the simulation method that considers a nonlinear model for the elastomer material and predicts the experimental results accurately. We considered the Mooney–Rivlin (M-R) model that has two-parameter (2P), five-parameter (5P), and nine-parameter (9P) forms, depending on the number of terms in the series. We observed that the load-displacement graph is linear, and the percentage error between the results obtained with 2P and 5P M-R models is around 2.23% in the compression and 0.38% in the shear. The simulation results from 2P M-R model showed a good agreement with the experimental results with the correlation coefficient (R2) being 0.999 with an average error of about 2%. However, the deviation between the experimental and simulation results from the 9P M-R model is very high, with about 7%. Based on this study, we can say that the 2P M-R model can accurately predict the nonlinear behavior of hyperelastic material used in elastomer bearing. In addition, the shear modulus of elastic bearings for Class 3 Shore hardness was verified by comparing the numerical simulation values with those presented in EN 1337-3 Annex D.https://www.mdpi.com/2076-3417/11/10/4384FPSO (floating production storage and offloading)offshore elastomeric bearingshear modulusshear stiffnessFEA (finite element analysis)experiment |
| spellingShingle | Dongseop Han Wooseong Che Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment Applied Sciences FPSO (floating production storage and offloading) offshore elastomeric bearing shear modulus shear stiffness FEA (finite element analysis) experiment |
| title | Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment |
| title_full | Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment |
| title_fullStr | Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment |
| title_full_unstemmed | Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment |
| title_short | Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment |
| title_sort | comparison of the shear modulus of an offshore elastomeric bearing between numerical simulation and experiment |
| topic | FPSO (floating production storage and offloading) offshore elastomeric bearing shear modulus shear stiffness FEA (finite element analysis) experiment |
| url | https://www.mdpi.com/2076-3417/11/10/4384 |
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