Study On Preparation And Mechanical Roperty Of Basalt Fiber Reinforced Foam Aluminum Sandwich Panels

The foam aluminum sandwich panel is a new type of lightweight material. Itis widely used in aviation, aerospace, automobile, construction and many otherengineering fields due to its excellent performance such as the high strength andstiffness, acoustic and heat insulation, fireproofing and insulation etc. Since theadvent of this new material, considerable researches involving static and dynamicmechanical property about facial panel for aluminum material have been done bydomestic and foreign scholars. Basalt fiber is from volcano rock, it has goodmechanical properties, especially with high temperature resisitant, acid and alkaliresistant, absorbing properties, which are not available about other materials, andusing the basalt fiber plate for aluminum foam sandwich facial panel can make fulluse of these advantages, realize integration of structure and function about thesandwich plate.Therefore, in this paper, the basalt fiber reinforced foam aluminumpanel which were self-manufactured facial panel for basalt fiber compositematerial and core for spherical hole foam aluminum were taken as research object, and the tensile test，compress test and three-point bending test were deeplyinvestigated. Quasi-static three-points bending test and dart drop impactthree-point bending test were the key points, and good results were obtained.Details are as follows:1、Used the vacuum-assistant resin injection(short for VARI) to composite thebasalt fiber and vinyl ester resin and made the basalt fiber composite materials.Effects of accelerant content on gel time and curerant content on gel time had beenstudied when prepared with vacuum-assistant resin injection．And then, there werethree layer ways to make the the basalt fiber composite materials for establishingthe mechanical property influence of fiber direction. Finally, self-manufacturedbasalt fiber composite materials and spherical hole foam aluminum were pasted toform the basalt fiber reinforced foam aluminum panel.2、The tensile test was carried out to detect the different layer ways in the basaltfiber composite materials, the failure mechanism and the mechanical propertyinfluence of fiber direction were gained. And then the compress test was put intoeffect for the sandwich panel and its core, the compress property of the coreaccorded with three sectional features and a good agreement was found between calculation and experimental value of compress yield strength. There was a greatdifference between the sandwich panel and foam aluminum about the compressstress and strain curve, the cuvre of the sandwich panel did not have three sectionalfeatures and displayed a marked difference with the facial panel for aluminummaterial.3、The quasi-static three-points beading property of the basalt fiber reinforcedfoam aluminum panel was studied, the load-deflection curve of sandwich beamswas higher markely than the sum of foam aluminum(alone) and its facialpanel(alone) and showed a favorable effect. Its bending stiffness coincided wellwith the calculated results, the sandwich beams had the higher bending specificstiffness and the lower density. And then the failure map of sandwich beams wasfound by limit loading formula. At the last, the design size of the sandwich beamswas builded by graphical analytic method.4、The low velocity impact three-points bending behaviors of the basalt fiberreinforced foam aluminum panel which was the same as the quasi-staticthree-points beading test were investigated experimentally with equal impact massand different impact energy. It was found that the impact initial failure modes were same to those quasi-static situation through the experimental phenomena and databy and large. Based on the validation of the data processing, the acceleration-timecurve, the velocity-time curve, displacement-time curve and load-displacementcurve were gained in the impact process. Finally, the plastic dissipative energy ofthe sandwich beams were worked out with different drop height in terms of energy.