Welding Aluminum Honeycomb Pressure Properties Of Numerical Simulation Study

Honeycomb sandwich panel with Honeycomb structure cores is inspired by the natural hexagonal honeycomb. Aluminum honeycomb sandwich panel which is made of aluminum alloy has a unique structure.The structure not only brings aluminum honeycomb sandwich panel the lightest quality in materials with the same volume,but also brings it excellent rigidity and overall stability. Furthermore, aluminum honeycomb sandwich panels also have soundproof and adiabatic performance. Aluminum alloy neither creat radioactivity pollution nor exhaust harmful gases to human health.After used Aluminum honeycomb sandwich panel can also be completely recovered for reuse, saving resources and energy, to minimize environmental pollution levels.So aluminum honeycomb sandwich panels are energy saving, environmental protection, health, new materials. Because of these advantages, honeycomb aluminum is widely used in aviation, aerospace, transportation, construction, military and other fields, for the manufacture of rocket fairing, aircraft wings and warehouses, rail bulkheads and floors, car the skin and doors, ceilings and walls and other buildings and so on.The connector of aluminum honeycomb sandwich panel maded with welding is metallurgical bonding.It overcomes the glued honeycomb panel'shortcomings that the strength, the service life and the allowable work environment on a large scale is constrained by adhesive,so the mechanical properties of welding aluminum honeycomb sandwich panel are better than the adhesive products with same specifications.Therefore, the research and development of welding aluminum honeycomb sandwich panel with excellent performance is very important. But the current domestic and international researches on the aluminum honeycomb sandwich panel are concentrating on glued aluminum honeycomb panel, and the finite element method is mainly used for studying properties of paper honeycomb panel and cellular structure of in-plane behavior and impact properties,but researches on out-of plane compression of welding aluminum honeycomb reported rarely. In order to provide information and theory evidence for further theoretical researches, developments and applications of welding aluminum honeycomb sandwich panel, based on the research of mechanical properties of welding aluminum honeycomb sandwich panels, the compression deformation process and mechanical properties of aluminum honeycomb sandwich panels and aluminum honeycomb cores were studied by MSC.Marc in this paper.The results of this research include:Based on the actual require the use of finite element simulation software MSC.Marc focuses on the cellular level pressure in the process of aluminum in the deformation process and the overall stress distribution was found welding aluminum honeycomb panels only transfer the axial pressure, while panel pressure in the flat when the instability does not affect the process. Analysis of the cellular process of aluminum in the level of local pressure stress distribution, wall cross edges office found the greatest force expressed as stress concentration appears in the cross edges department, relative, in addition to the initial stage of the compression process, the same compression ratio wall stress is much less than the central edge of the stress of delivery. Stress along the cross is not evenly distributed edge:cross edge stress is always less than the endpoint of the middle edge of the stress of delivery; uner greater compression, stress's peaks often appear near 1/3,1/2 and 2/3 of height along cross edges.In this paper,futher investigations of aluminum honeycomb core's mechanical properties during compression deformation process which base on the finite element analysis have been done by MSC.Marc.The influence that brings by different side length and height on honeycomb core's mechanical properties also has been studied.The resules show that under the axial pressure the wall edges department pay the maximum force expressed as stress concentration occurs in the area. Honeycomb core edge looks at the same time, different height has little effect on the maximum stress.Honeycomb core with the same height, with a side length of the maximum first decreases, then increases the stress recovery. Regardless of the changes in height, the maximum value of stress always concentrates on 1/2 or 1/3 of height along cross edges.Compared with cross edges, stress distributing on the central area of cell wall is small,and maximum stress location appears trend that it slides down along the cross edge during increasing of side length.