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Capturing stiffening effect due to viscoelastic behavio on abaqus

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  • Capturing stiffening effect due to viscoelastic behavio on abaqus

    Hello all,

    I've measured with DMA viscoelastic behavior(@different temperature and frequencies) of a composite material, extracted prony serie coefficients.

    To test my model(abaqus) I want to observe the different stiffness at different frequencies (that was observed during DMA )
    To do so, I've:
    1. implemented a simple 3 points bending model
    2. implement elastic and visco (frequency domain, prony series) material
    3. create a visco step, with small enough step to capture the sinusoidal exitation
    4. create a amplitude load with the desired frequency

    In the visualization model I extract the S11 and E11 in the middle of the plate to compute the stiffness. But when using different frequencies of solicitation I get the same stiffness which is near the stiffness give in the elastic properties. Where do I do wrong?

    Thank you for your help,

    V
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