Numerical and experimental investigations on the formability of three-dimensional aluminum alloy sandwich panels with egg-box-like cores

Light-weight sandwich panels are commonly used in various industries to improve the stiffness and reduce the weight of structure component. For many applications, sandwich panels are required as three-dimensional shells rather than flat plates. However, sandwich structures with curved mid-planes are difficult to make at the present time. This paper was focused on the plastic forming operation of aluminum alloy sandwich plate with egg-box-like...