3. Study of viscoelasticity by instrumented indentation
Since polymers exhibit low-strain viscoelasticity, indentation studies of their viscoelastic behavior use spherical indenters or small increments of displacement of a conical indenter to impose low strains on the material.
3.1 Frequency rheology
3.1.1 Procedure and theoretical interpretation
On the most efficient indentation machines, the force is applied by means of a solenoid, and the contact stiffness ( Continuous Stiffness Measurement – CSM) by superimposing on the exponential...
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Study of viscoelasticity by instrumented indentation
Elastoviscoplasticity characteristics
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