Snap-through and Eulerian buckling of the bi-stable von Mises truss in nonlinear elasticity: A theoretical, numerical and experimental investigation

In this paper, equilibrium and stability of the von Mises truss subjected to a vertical load are analyzed from theoretical, numerical experimental points view. The bars composed rubber material, so that large deformations can be observed. analytical model is developed in fully nonlinear context finite elasticity constitutive behavior modeled using Mooney–Rivlin law. parameters identified by means genetic algorithm fits data uniaxial tests on specimens. analysis performed through element (FE) model. Differently FE simulations found literature, models presented work entirely three-dimensional elasticity. Experiments conducted with device allows specimens undergo axial deformations. For first time, snap-through observed experimentally materials, showing good agreement both theoretical results. Further insights Eulerian buckling its interaction given. A simple formulation determine critical accuracy validated observation. Comparisons linear based approach demonstrate an accurate prediction requires formulations, such as ones proposed work. • Equilibrium investigated. Analytical bars. Snap-through