多腔拉挤型材夹芯复合材料板受弯试验与理论分析OA

This paper presents a novel multi-cavity pultruded profile sandwich composite panel with a pultruded profile core and fiber-reinforced web panels and webs.The bending performance of the multi-cavity pultruded profile sandwich composite panel was investigated using four-point bending tests.The test results showed that the multi-cavi-ty pultruded profile sandwich composite panels exhibited core shear and panel compression damage.The ultimate load-carrying capacity increases with the increase of the number of fiber layers,and the increase of the core fiber layer can improve the maximum ultimate load carrying capacity of 20.32％,and the increase of the overall panel fiber layer can improve the maximum ultimate load carrying capacity of 28.04％.Increasing the aspect ratio of pultruded profile sand-wich composite panels increases the ultimate load carrying capacity by a maximum of 40.46％.The ultimate bearing capacity of multi-cavity pultruded profile sandwich composite panel is 204.90％of that of foam sandwich composite panel,and the specific strength and specific stiffness are also higher than those of foam sandwich composite panel.In addition,the theoretical equivalent flexural stiffness values of the pultruded profile sandwich composite panels were calculated using the classical sandwich theory,which were in good agreement with the test results.