Finite Element Analysis

A continuum-based linear material model that exhibits both elastic and viscous properties. Both temperature and strain-rate dependency of the mechanical response can be accounted for. This type of material model is only used for small strain problems.

A continuum-based material model that includes both elastic and plastic behavior of the material. Using this type of material model is used to model the permanent deformation and nonlinear behavior of the adhesive. Depending on the calibration it could include strain rate and temperature effects. Pressure-sensitive elastoplastic models are commonly used for polymers and adhesives to accurately reproduce the response under different loading conditions like tensile, compression, shear.​

A continuum-based nonlinear material model that uses parallel networks of non-linear springs and dashpots to model the adhesive mechanical response. The non-linear elastic response of springs in the network is derived from a strain energy density function (Hyper-elasticity). This type of material model is generally used to model the mechanical response of adhesives that undergo large deformations and show nonlinear viscous behavior. The mechanical response under tension, compression, and shear can be included in this type of model. Depending on the experimental inputs temperature, strain rate, permanent set, and relaxation effects can be included.

A fracture mechanics-based material model that is used to model the crack separation within a bond line. The model is built using traction-separation laws for mode I, mode II and mode III of fracture while the mixed mode behavior is calibrated using data from mixed mode experiments. This type of model is used to predict cohesive failures within the adhesive bonds.