The expauded metal sheets were folded with 11％ work-hardening.These were subsequently used with resistance welding to construct X-type lattice truss sandwich panels having a core relative density of 0.17.The sandwich panels were tested in uniaxial compression and,for comparison,the method of finite elements was employed to simulate the measured compressive stress-strain curves.The peak compressive strength was 32％ higher than that of pyramidal core sandwiches.The enhanced mechanical properties of the work-hardened X-Type lattice structures mainly originate from the contribution of straight struts with low degree of curvature and work hardeuiug,rather than the two-dimensional staggered nodes.