Experimental Research And Numerical Simulation Of In-plane Compression And Shear Of Epoxy-honeycomb Aluminum Sandwich Panel

The honeycomb aluminum sandwich panel consists of a core material in the middle and two panels with certain strength.The panel is mainly subjected to bending loads,and the core bears the shear forces and transmits loads between the entire structure.It can significantly reduce the weight of the structure and ensure the structural strength accordingly.Due to its light weight,high specific strength,high specific stiffness,impact resistance,sound insulation and other advantages,the sandwich panel has been widely used in various fields,such as aerospace,automobile manufacturing,ship navigation,building decoration and military etc.In this paper,it studies the in-plane compression and shear of a new type of epoxy resin-honeycomb aluminum composite sandwich panel through a combination of experimental research and numerical simulation.Initially,it conducts the in-plane compression and in-plane shear experiments of epoxy resin-honeycomb aluminum sandwich panel,and the failure process and destruction form of the honeycomb aluminum sandwich panel are summarized.It analyzes the force-displacement by varying the parameters of the thickness of the honeycomb aluminum core layer,the thickness of the surface layer,and the size of the honeycomb aperture.In addition,it compares the ultimate load and energy absorption capacity of different honeycomb aluminum sandwich panels.What's more,it established a finite element model of epoxy resin-honeycomb aluminum sandwich panel to conduct numerical simulation of in-plane compression and in-plane shear process.In order to verify the established finite model is accurate,it compares simulation's force-displacement curve and failure process with the experiment results.On this basis,it conducts parameter expansion research for the parameters set in the experiment to analyze the effect of various parameter on the ultimate load and energy absorption capacity of honeycomb aluminum sandwich panel.The study shows that the epoxy resin-honeycomb aluminum sandwich panel has good in-plane compression and shear mechanical properties.During the loading process,there are no detachment or cracking between the surface layer and the core,indicating that the epoxy-honeycomb aluminum maintains good integrality and stability.It is found that it has a significant effect on the in-plane compression of the sandwich panel by reducing the thickness of the core layer,increasing the thickness of the surface layer,and reducing the honeycomb aperture size,However,it has a tremendous effect on the in-plane shear of the sandwich panel by reducing the thickness of the core layer and the honeycomb aperture size,while it has not obvious effect on the in-plane shear by varying the thickness of the surface layer.