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

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

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

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

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

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

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

9. 2nd Youth Symposium on Experimental Solid Mechanics
Output
Accelerations
System Frequency response
Stiffness
2nd Youth Symposium on Experimental Solid Mechanics

10. 2nd Youth Symposium on Experimental Solid Mechanics