Responses of re-entrant cylindrical tubes under internal loading

Re-entrant honeycomb core, which are a variation of the honeycomb in the shape of an hourglass, are part of the auxetic family which provides elevated energy absorption capabilities and structural strength. This thesis focuses on converting a flat plane re-entrant honeycomb core to a cylindrical tube. It examines the strengths and weaknesses of using re-entrant honeycomb core in a cylindrical tube, manufactured via 3D printing. Experimental testing employs an umbrella mechanism to simulate internal loading, validated by virtual simulations using ABAQUS and analytical modeling. Showing promise for integrity improvements to real-life cylindrical structures and builds.