Sandwich panels with multilayer pyramidal truss cores were manufactured by additive manufacturing. The compressive resistance and destructive behavior were obtained by test under compressive load. The experimental results show that the compressive behavior is very stable, and the load-displacement curves show the same change regulation. The node regions of pyramidal lattice emerge plastic deformation firstly with the increase of compressive load, and then several fractures occur at the node regions of the middle two layers. The average compressive strength of the sandwich panels with multilayer pyramidal truss cores is 6.72 MPa. The molding quality of the back of pyramidal truss is bad owing to the restriction of the technology, so the radius of the truss is smaller than theoretical value. The experimental compressive strength is smaller than theoretical value and simulation calculation value. The compressive strength by theoretical analysis is higher than experimental value because of idealized assumption; while the simulation calculation result agrees with experimental result, the error is around 20%. Comparing the load-displacement curves and deformation, the simulation calculation method will exactly calculate the compressive resistance and destructive behavior of sandwich panels with multilayer pyramidal truss cores.
Compressive Behavior of Sandwich Panels with Multilayer Pyramidal Truss Cores by Additive Manufacturing
2018
Article (Journal)
Electronic Resource
Unknown
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