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EXPERIMENTAL MESUREMENTS OF THE DYNAMIC PROPERTIES OF VISCOELASTIC MATERIALS AND SYSTEMS Imeko Technical Committee 15 2nd Youth Symposium on Experimental.

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Presentation on theme: "EXPERIMENTAL MESUREMENTS OF THE DYNAMIC PROPERTIES OF VISCOELASTIC MATERIALS AND SYSTEMS Imeko Technical Committee 15 2nd Youth Symposium on Experimental."— Presentation transcript:

1 EXPERIMENTAL MESUREMENTS OF THE DYNAMIC PROPERTIES OF VISCOELASTIC MATERIALS AND SYSTEMS Imeko Technical Committee 15 2nd Youth Symposium on Experimental Solid Mechanics May, 7-10 2003 Milano Marittima (Ravenna), Italy Andrea Magalini, David Vetturi Dipartimento di Ingegneria Meccanica Università degli Studi di Brescia

2 2nd Youth Symposium on Experimental Solid Mechanics 2 Introduction Dynamic characterization of rubber-to-metal devices for automotive applications Research partnership University of Brescia Mechanical Engineering Department CF Gomma Group

3 2nd Youth Symposium on Experimental Solid Mechanics 3 Rubber-to-metal devices Automotive applications: Vibrations-damping devices Vibrations- damping device for Mc-Pherson suspensions Engine mountings Adaptive journal boxes

4 2nd Youth Symposium on Experimental Solid Mechanics 4 Engine mountings Adaptive journal boxes

5 2nd Youth Symposium on Experimental Solid Mechanics 5 Materials Dynamic properties of elastomers Visco-elasticityHysteresisSelf-heating Non - linearity (stress-deformation curves)

6 2nd Youth Symposium on Experimental Solid Mechanics 6 Frequency effects Temperature effects Stress Strain Temperature

7 2nd Youth Symposium on Experimental Solid Mechanics 7 Experimental analysis Electro-dynamic shaker Fixtures Standard test-pieces Rubber-to-metal devices Material properties: E* and G* Device global stiffness: K* Sweep of sine waves at constant deformation levels Shaker Vibrating board Test specimen Suspended mass

8 2nd Youth Symposium on Experimental Solid Mechanics 8 Measurement chain Shaker PC &Controller PowerAmplifier ADC Acceleration measurement Temperature measurement Drive signal Power drive Data Test Design DAC

9 2nd Youth Symposium on Experimental Solid Mechanics 9 Output AccelerationsSystem Frequency responseStiffness

10 2nd Youth Symposium on Experimental Solid Mechanics 10


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