VARI成型不同处理方法泡沫夹芯复合材料工艺及性能研究

采取泡沫芯刻槽和泡沫芯导孔两种处理方法预制备泡沫芯材,采用VARI工艺成型泡沫夹芯复合材料,对复合材料进行无损检测,并对其成型效率、质量和力学性能进行研究。结果表明:刻槽和导孔处理可以有效地提高泡沫夹芯复合材料的成型效率,且其表面质量良好;三种泡沫夹芯复合材料泡沫与复合材料面板间均结合紧密,不存在贫胶、分层等缺陷;经刻槽处理后,泡沫夹芯复合材料的剥离强度有所下降,而弯曲强度和侧压强度略有上升;经导孔处理后,泡沫夹芯复合材料的剥离强度、弯曲强度和侧压强度均小幅下降。总的来看,不同处理工艺对VARI泡沫夹芯结构力学性能影响不大。

STUDY ON PROCESS AND MECHANICAL PROPERTIES OF THE VARI FORMING FOAM-CORE SANDWICH COMPOSITE BY DIFFERENT HANDING METHODS

In this paper,two kinds of methods were taken:grooves and holes to process foam core in advance,VARI molding process was used to prepare foam-core sandwich composite,the non-destructive test,the molding efficiency,the surface quality and the mechanical properties of the foam-core sandwich composite were studied.The results show that grooves and holes could improve the molding efficiency of the foam-core sandwich composite effectively,whose surface quality was good.The combine between foam core and skin of sandwich of three kinds of foamcore sandwich composite was tight,and poor glue and delaminations were not existing.The peel strength of the foam-core sandwich composite was decreased somewhat,while the bending strength and the edge compressive strength were increased slightly after the handing methods of grooves.The peel strength,the bending strength and the edge compressive strength of the foam-core sandwich composite were all decreased to some extent after the handing methods of holes.In general,different processes have little influence in mechanical properties of the VARI forming foam-core sandwich composite.