Modelling the mechanical behaviour of adhesively bonded and sintered hollow-sphere structures

摘要

The mechanical properties of periodic hollow-sphere structures are investigated numerically. Young's modulus and the Poisson ratio are determined in order to describe their linearly elastic, behaviour. The initial compressive yield strength is also calculated. The spheres are located at the nodes of a cubic primitive lattice. The cohesion is achieved by an adhesive concentrated in the minimum gap between neighbouring spheres. The geometry of the structure is discretized based on regular hexahedral elements. This approach is much more time-consuming, but it is important in order to achieve a more accurate simulation of the nonlinear behaviour (e.g, plasticity) of such materials.