| Sandwich constructions due to its high strength, light specific gravity and excellent properties such as heat insulation and sound insulation, are widely used in every field of modern engineering practice, The core material of light wood sandwich plate is a kind of green environmental protection sandwich material, the sandwich plates of this core material are now widely used in blade shell structure of wind turbines, the engine hood structure with sandwich sailing, the lightweight built-in or artifacts of power yachts shell and sport cruiser, the lightening techniques of high-speed train, light weight and high stiffness explosion-proof shields, etc. In this article, through making balsa sandwich plates, and carries on the experiment, combining with finite element analysis, reaching some useful conclusions and laws, have a certain help for its application in engineering.First of all, three point bending experiments are need to be tested in sandwich plate specimens, by loading in different location to study whether it has an effect on mechanical properties and failure modes of sandwich plates, at the same time, according to the standard, obtaining the measured values of bending stiffness and shear stiffness, and comparing with the theoretical values, studying the impact of the core material thickness, loading position and core material density on the mechanical properties.Second, pull cutting experiments are need to be tested in another group light wood sandwich plate specimens, recording test phenomenon and test process, and summed up failure patterns under the action of tenso-shear, obtained shear strength and core material shear modulus of elasticity according to the specification requirements, etc.Finally, through the finite element simulation, comparing with the experimental values and the finite element simulation, analyzing the causes of producing errors. |
