IMMC Material Characterization
At present, high-rate material properties and the associated constitutive equations are not available for many low impedance (soft) materials. In particular, the mechanical properties of biological tissues and polymers are not well understood at high rates of strain. This fundamental knowledge is necessary for the development of numerical and physical models to assess the performance of soft materials subject to high rate deformation.
Materials such as foams, elastomers and rigid polymers are commonly used in energy absorbing (impact) applications. The development of advanced human body models for virtual evaluation and design of safety systems requires dynamic properties for biomaterials.
One of the most important challenges in advanced modeling today is the characterization of mechanical properties and implementation in a numerical environment.
Low impedance materials exhibit a high degree of rate sensitivity. We are often interested in high deformation rates and large deformations. These materials are dispersive and have low impedance, which is important when considering wave effects.
Advanced constitutive modeling considers material nonlinearity, hyperelasticity, viscoelasticity and damage.
CAE Implementation and model verification and validation (V&V) form the foundation for advanced predictive modeling.