The LRCCP is in a position to carry out mechanical characterization
tests on test pieces (behaviour laws) or on parts both statically
and dynamically.
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BEHAVIOUR
LAWS
To furnish the necessary data for the calculation codes, we formulate
the behaviour laws in the following fields:
Highly deformable elastomers
Rigid polymers
Hyperelasticity
Elasticity
Static viscoelasticity
Plasticity
Dynamic viscoelasticity
Viscoplasticity
These behaviour laws can be established under conditions representative
of the application considered (temperature, speed of loading, load
cycles, etc.) for various types of load:
Uniaxial and equibiaxial tension,
Uniaxial and hydrostatic compression,
Pure and simple shearing,
Flection,
Creep,
Relaxation.
•
Example of a hyperelastic behaviour law for a filled natural
rubber ( 2nd order Ogden law) :
Click to enlarge
AGEING
The LRCCP has relaxation and creep test benches permitting
long-term viscoelastic characterization. The results of these
characterizations can be processed to forecast long term behaviour
and provide the experimental data necessary for this type of
calculation.
• Example of implementation of the principle of time/temperature
equivalence:
Click to enlarge
Uniaxial and equibiaxial tension,
