Subspace Mixed-FEM for Real-Time Heterogeneous Elastodynamics

We propose a reduced space mixed finite element method (MFEM) built on a Skinning Eigenmode subspace and material-aware cubature scheme. Our solver is well-suited for simulating scenes with large material and geometric heterogeneities in real-time. This mammoth geometry is composed of 98,175 vertices and 531,565 tetrahedral elements and with a heterogenous composition of widely varying materials of muscles (E= 5×10⁵ Pa), joints (E=1×10⁵ Pa), and bone (E=1×10¹⁰ Pa). The resulting simulation runs at 120 frames per second (FPS).