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Modeling of Viscoelastic Behavior of 3D Printed Polimeric Materials

Linear viscoelastic materials whose characteristics are suitable for description by the Prony series use experimental data to obtain the so-called “master” curve. The analysis of experimental results with the Prony model sometimes requires prior knowledge of the time parameters of the model ,, in order to make the corresponding module more suitable for use in analytical form. In this way, the existing model is optimized to some extent, while in this paper the approach is used that all parameters in the Prony series for (E i , τ i ) were determined using the well-known least squares method and its variations. The number of members in Prony’s series is initially smaller and increases proportionately. To determine the relaxation modulus using the Prony model, an example from an available article [1] was selected in this paper, while the performed experiment was used to determine the creep modulus. During the performance of the load experiment, the function of constant increase (ramp-test) was used. The previous experiment was done for the actual material ABS plastic (Acrylonitrile butaden styrene).

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