# Low-density foams

 The low-density foam material model: is intended for low-density, highly compressible elastomeric foams with significant rate sensitive behavior (such as polyurethane foam); requires the direct specification of uniaxial stress-strain curves at different strain rates for both tension and compression; optionally allows the specification of lateral strain data to include Poisson effects; allows for the specification of optional unloading stress-strain curves for better representation of the hysteretic behavior and energy absorption during cyclic loading; and requires that geometric nonlinearity be accounted for during the analysis step (see Defining an analysis and General and perturbation procedures), since it is intended for finite-strain applications. The following topics are discussed:
 Related Topics About the material library Elastic behavior In Other Guides *LOW DENSITY FOAM *UNIAXIAL TEST DATA Creating a low-density foam material model

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