Foam Aluminum-Hollow Glass Microsphere/Epoxy Resin Composite Study Of Mechanical Properties

The aluminum foam-hollow glass microbead/epoxy composite material is a new type of composite material made of aluminum foam as the skeleton,and the hollow glass microbead modified epoxy resin is poured into it,and its quality is lighter.High strength,not afraid of high temperature and corrosive environment,and has good energy absorption performance.The composite material has been applied in many fields such as transportation,aerospace,shipbuilding and construction.With the development of engineering technology,the application requirements for materials are getting higher and higher,so the subject of studying their mechanical properties has become more and more important.In this paper,the compression and low-velocity impact experiments of two types of aluminum foam-hollow glass beads/epoxy composites were studied,and the effects of aluminum foam pore size and hollow glass beads filling mass ratio on the mechanical properties of the composite were discussed.A composite cylindrical specimen of aluminum foam with pore diameters of 5mm and 10 mm and a hollow glass microsphere filling mass ratio of 0%,1%,2%,3%,4% and 5% was prepared,and the aluminum foam was analyzed by compression experiment The effect of different mass ratios of pore size and hollow glass microspheres on the composite compressive yield limit,compressive elastic modulus,specific strength and specific stiffness.The study found that the changes in the compression yield limit and specific strength of the two pore-sized aluminum foam composites are basically the same,both increase first and then decrease as the filling mass ratio of the hollow glass microspheres increases.The compressive elastic modulus and specific stiffness of the specimens tended to increase first and then decrease with the increase of the filling mass ratio of the beads.A composite material plate with a foam aluminum pore diameter of 5 mm and 10 mm and a hollow glass microsphere filling mass ratio of 0%,1%,2%,3%,4%,and 5%,respectively,was prepared.In the experiment,the impact load-time curve and energy-time curve of the composite plate were obtained,and the influence of the change of the filling mass ratio of the hollow glass beads on the stiffness,rebound energy and energy absorption capacity of the composite plate was analyzed.The study found that the composite plate with 3% and 4% bead filling mass ratio has less energy absorption,a larger peak impact load,a shorter loading time,a smaller displacement of the specimen,and the least damage,showing It has better impact resistance performance.A foam aluminum composite plate with a diameter of 10 mm was prepared,in which the filling mass ratio of hollow glass microspheres was 3%.The impact responses of falling weight impact speeds of 2m/s,3m/s,4m/s,5m/s and 6m/s were studied,and the impact load peak,failure displacement,energy and impact speed of the composite plate were analyzed.relationship.The study found that as the impact velocity increases,the more severe the damage to the specimen,the more energy is absorbed,the earlier the damage begins,and the shorter the impact time.The peak impact load of the composite plate increases with the increase of impact velocity.