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Overview Resources

PolyUMod by PolymerFEM, LLC.

Material Models, Nonlinear, Time-Dependent

PolymerFEM offers the PolyUMod Library of user-material models for non-linear finite element modeling of engineering polymers and biomaterials. This library provides numerically efficient material models that can be used to very accurately represent the large strain viscoplastic response of materials. The PolyUMod library contains general purpose material models that cover virtually all polymer systems, including thermoplastics, thermosets, elastomers, foams, filled plastics, and biomaterials. Specific models have also been developed for particular formulations such as fluoropolymers, PLA, and UHMWPE.

Why PolyUMod?

Supports Non-Linear Viscoplasticity

PolyUMod for Radioss supports many advanced and accurate non-linear viscoplastic material models suitable for all polymers.

Generate Accurate Altair® Radioss® Simulations

The PolyUMod library enables Radioss to accurately predict the response many different types polymer products.

Full Control of the Material Behavior

The response of many polymers is characterized by significant time- and rate-dependence. These effects can be easily predicting using the PolyUMod library.

Key Features

Analyze Thermoplastics Using TN Model

The TN model is one of the most accurate viscoplastic material models for thermoplastics.

Analyze Non-Linear Viscoplastic Foams

The TNV model from the PolyUMod library can be used to accurately predict the rate-dependent and energy absorption in foams.

Viscoelastic Response of Rubbers

The Bergstrom-Boyce (BB) model is excellent at predicting the non-linear viscoelastic response of rubbers, both for quasi-static and dynamic loads.

Predict Necking of Thermoplastics

Many thermoplastic materials exhibit necking when deformed. This type of deformation can be accurately captured using the PolyUMod TNV model.

Predict the Safety Factor when Deformed

The TNV model supports advanced rate-, pressure-, and triaxiality-dependent failure models.

Accurate Predictions of Residual Strain

Many polymers exhibit a time-dependent recovery after unloading. The PolyUMod library contain multiple material models for predicting the recovery response.