In-Plane Crushing of Triangular Honeycomb Cores, Part II: Under Dynamic Loadings

The dynamic behaviors of triangular honeycombs cores (THCs) are investigated by using the finite element (FE) simulations under the in-plane dynamic crushing loadings. With the increasing impact velocities, different deformation modes are observed and the kinetic energy of specimen increases rapidly. The in-plane dynamic plateau stress is the sum of the static plateau stress and the dynamic enhancement due to the inertia effect. The static plateau stress has been discussed in Part I. When all configuration parameters are kept constant, the dynamic enhancement stress is proportional to the square of impact velocity. For a given impact velocity, the dynamic enhancement stress is proportional to the density of THCs when the expanding angle is kept constant. The in-plane dynamic plateau stress is expressed empirically in terms of configuration parameters and impact velocity.