Dynamic Effects of Preload in Hyperelastic Foam Models [Slides]

Research Experience and Projects Los Alamos National Laboratory – GRA in the Advance Engineering Analysis Group (E-13) 2019 • Project: Dynamic Effects of Preload in Hyperelastic Foam Models • Mentors: Scott Ouellette, Ph.D. (LANL, E-13); Adam Wachtor, Ph.D. (LANL, NSEC) • Generated a suite of finite element (FE) and numerical simulations to perform a parameter study for a closed-cell foam constitutive material model. Parameters were varied for each set of simulations to generate a sensitivity index for properties within the parameter space of the material model. • Results from the suite of parameterized FE models were used to inform a reduced-order system model, evaluate its uncertainty, and compare the reduced-order model to a more complex full system model. • Fundamental frequency response was the main metric used to compare results from the reduced-order and full system models for solution verification. The result was a computationally inexpensive reducedorder model that predicts the bounds of the frequency response of more geometrically complex systems.