In this paper, the variability of dynamic stiffness in an elastomer due to thermal aging is estimated using a degradation model and uncertainty quantification method. A degradation model introduced for the thermal aging also describes the variation of the material properties along time.
A finite element model describes the dynamic characteristics of the elastomer. The variability of the predicted degradation under the quantified uncertainties is estimated using the double-loop eigenvector dimension reduction (EDR) method. The proposed method is applied to a mount as a numerical example.
Celina MC (2013) Review of polymer oxidation and its relationship with materials performance and lifetime prediction Polymer Degradation and Stability 98:2419-2429
Jung BC, Lee D, Youn BD (2009) Optimal Design of Constrained-Layer Damping Structures Considering Material and Operational Condition Variability AIAA Journal 47:2985-2995
Jung BC, Lee D, Youn BD, Lee S (2011) A statistical characterization method for damping material properties and its application to structural-acoustic system design The Journal of Mechanical Science and Technology 25:1893-1904
Kwon J-H, Lee D (2015) Variability analysis of vibrational responses in a passenger car considering the uncertainties of elastomers Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science doi:10.1177/0954406215612816
Lee D, Hwang I-S (2011) Analysis on the Dynamic Characteristics of a Rubber Mount Considering Temperature and Material Uncertainties Journal of the Computational Structural Engineering Institute of Korea 24:383-389
Lee D, Hwang I-S, Ahn T-S (2013) Uncertainty characterization of an Engine Mount Rubber and Variability Analysis of Dynamic Characteristics in a
Passenger Car. Paper presented at the The 20th International Congress on Sound and Vibration, Bankok,
Lee D, Kim NH, Kim H-S (2016) Validation and updating in a large automotive vibro-acoustic model using a P-box in the frequency domain Structural and Multidisciplinary Optimization:1-24 doi:10.1007/s00158-016-1427-0
Youn B, Xi Z, Wang P (2008) Eigenvector dimension reduction (EDR) method for sensitivity-free probability analysis Structural and Multidisciplinary Optimization 37:13-28 doi:10.1007/s00158-007-0210-7