A Combined Theoretical/Experimental Approach to the Dynamic Characterization of Viscoelastic Materials

1992 ◽  
Vol 114 (1) ◽  
pp. 77-80 ◽  
Author(s):  
R. Greif ◽  
M. S. Johnson
Keyword(s):  
Dynamic Response ◽  
Loss Factor ◽  
Experimental Approach ◽  
Mechanical Characterization ◽  
Dynamic Characterization ◽  
Viscoelastic Materials ◽  
Theoretical Formulation ◽  
Experimental Approaches ◽  
Detailed Derivation

This research combines theoretical and experimental approaches to the dynamic mechanical characterization of viscoelastic materials. A detailed derivation is presented for the dynamic response of a typical viscoelastic rod sample. Particular attention is given to the effect of inertia on experimental results for storage modulus and loss factor. The limitations of the testing equipment are examined in comparison to the theoretical formulation.

Dynamic Characterization of Viscoelastic Materials

2004 ◽  
Author(s):  
Eduardo Romann Martini ◽  
Andrea Tonoli ◽  
Nicola Amati ◽  
Andrea Guala
Keyword(s):  
Dynamic Characterization ◽  
Viscoelastic Materials

Combined analytical and experimental approaches to rotor components stress predictions

2011 ◽  
Vol 225 (4) ◽  
pp. 322-330 ◽  
Author(s):  
M Chierichetti ◽  
C McColl ◽  
D Palmer ◽  
M Ruzzene ◽  
O Bauchau
Keyword(s):  
Experimental Data ◽  
Dynamic Response ◽  
Complex Systems ◽  
Rotor Blade ◽  
Experimental Approach ◽  
Numerical Results ◽  
Multibody Model ◽  
Lab Experiments ◽  
Experimental Approaches ◽  
Thin Walled

A combined analytical and experimental approach is introduced to estimate the dynamic response of complex systems from a limited number of measurements. The method is based on the concept that modal information is sufficient to extrapolate the complete map of the response from experimental data through the reconstruction of modal loads. The capabilities of the algorithm are first verified via well-controlled lab experiments on a thin-walled aluminium-rotor blade. Numerical results from a comprehensive UH-60 multibody model are then compared with available experimental data. Significant improvements in the accuracy of the predicted results are achieved when simple airloads models are employed as inputs.

scholarly journals Experimental approach for microscale mechanical characterization of polymeric structured materials obtained by additive manufacturing

2020 ◽  
Vol 89 ◽  
pp. 106634 ◽  
Author(s):  
Joseph Marae Djouda ◽  
Mohamed Ali Bouaziz ◽  
Marouene Zouaoui ◽  
Matthieu Rambaudon ◽  
Julien Gardan ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Experimental Approach ◽  
Mechanical Characterization ◽  
Structured Materials

Experimental Techniques for Dynamic Characterization of Composite Materials

1995 ◽  
Vol 117 (1) ◽  
pp. 94-100 ◽  
Author(s):  
Robert Greif ◽  
Benjamin Hebert
Keyword(s):  
Composite Materials ◽  
Material Characterization ◽  
Room Temperature ◽  
Dynamic Properties ◽  
Flexural Modulus ◽  
Bending Test ◽  
Dynamic Characterization ◽  
Three Point Bending ◽  
Experimental Approaches

This research combines theoretical and experimental approaches for dynamic material characterization of composite materials. The samples studied include continuous fiber graphite/epoxy beams with various symmetric lay-up configurations. Included are laminated beams with the following lay-ups: [08/908]s, [908/08]s, [(45/0/−45)5]s and [(0/45/0/−45)3/90/0/01/2]s. The resonant dwell technique is used to determine the material damping and the real part of the dynamic flexural modulus of double cantilever beam specimens in the first mode of vibration over the frequency range 25 Hz to 300 Hz. The dynamic properties are determined as a function of the frequency of oscillation at room temperature. In addition, the Metravib Viscoanalyzer, based on off-resonance tests, is also used to provide another source of experimental data for comparison. Although the Viscoanalyzer was originally intended for testing viscoelastic polymers, the present research establishes the limits of applicability for composite materials, with particular emphasis on the three point bending test. Comparisons and limitations of both techniques are critically discussed.

scholarly journals ON AN INTEGRATED DYNAMIC CHARACTERIZATION OF VISCOELASTIC MATERIALS BY FRACTIONAL DERIVATIVE AND GHM MODELS

2019 ◽  
Vol 16 (2) ◽  
Author(s):  
Wagner Barbosa de Medeiros Júnior ◽  
Cíntia Teixeira Préve ◽  
Fernanda Oliveira Balbino ◽  
Thatiane Alves da Silva ◽  
Eduardo Márcio de Oliveira Lopes
Keyword(s):  
Fractional Derivative ◽  
Dynamic Characterization ◽  
Viscoelastic Materials
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