Study on Four Point Bending Mechanical Properties of Foam Sandwich Panels
In order to study the mechanical response and damage mode of the foam sandwich board under bending load,a four-point bending test of the carbon fiber fabric foam sandwich board was conducted,and a three-dimensional finite element model of the four-point bending of the sandwich board was established with Abaqus software for finite element analysis.The results showed that the main damage mode of the foam sandwich board was matrix/fiber compression failure,which was consistent with the experiment.The influence of different foam thickness and material strength on the bending properties of the foam sandwich panels was analyzed by simulation.The results show that the greater the thickness of foam,the higher the strength of foam,the higher the overall stiffness of sandwich panel,and the stronger the bending capacity.
foam sandwichfour-point bendingcomposite materialsfinite element method
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