The goal of this ongoing initial study is to model the critical behaviors of rotorcraft elastomeric dampers, i.e. the hyperelastic, viscous, and nonlinear behaviors involving hysteresis loops. On completion, the current model would not require the physical damper to exist a priori, and could be used to optimize damper design concepts. An initial, overall validation effort has demonstrated the successful step-by-step sample development of a new finite element damper model and, importantly, its integration with the multibody dynamics analysis DYMORE. Two material models, the Haupt-Sedlan model and the recently proposed Höfer-Lion model, have been analyzed, and the results have been fitted to sample experimental data. Both models gave acceptable results for the storage and loss moduli. Since at present there is a dearth of available appropriate material data for the typical elastomers used in helicopter dampers, a new experimental effort has been initiated by Materials Technologies Corporation (MTC) and Georgia Tech to conduct materials testing and acquire the required material data.
Analytical, first principles modeling of elastomeric dampers
Erste analytische Modellierungsprinzipien für elastomere Dämpfer
2010
15 Seiten, 21 Bilder, 21 Quellen
Conference paper
English
Analytical, First Principles Modeling of Elastomeric Dampers
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