Abstract
The design and experimental analysis of a semi-cylindrical structure known as the cylindrical beetle elytron plate(CBEP)were presented.Radial compression tests and finite element simulation were performed on CBEPs under 30° and 45° inclined sliding support constraints,with a comparison made to cylindrical honeycomb plate(CHP).The study aims to investigate the superior compression performance and enhancement mechanisms of CBEPs.The results demonstrate that CBEPs exhibit a 14％-26％increase in specific load-bearing capacity and a 20％increase in specific energy absorption compared with CHPs with equal core wall thickness.Distinct"Z-shaped"tearing failures were observed,with honeycomb plates showing tearing at the center of the honeycomb walls,while beetle elytron plates exhibited tearing along the midline of the trabeculae.Three different stress patterns,including elastic-plastic development stage of arch,plastic hinge node stage,and rigid node stage,were identified and analyzed to explain the mechanical performance improvements and failure characteristics.Considering that structural damage to trabe-culae mostly occurs at its junction with the skin,it is recommended to add chamfers to the junctions of CBEP.Therefore,this paper lays the groundwork for the engineering application of CBEP.
万方数据