Effect of sewing on the strength of foamy core composite sandwich panels

In this research, a sandwich panel made of polystyrene foam core with fiberglass composite skins is studied.The main purpose of the paper is to investigate the effect of core sewing with polyester yarn on mechanical propertiesof sandwich panel. Thereby, a polystyrene foam core with a thickness of ۱۰ mm and two fiber glass composite skins areused for the fabrication of the sandwich panel. The size of the samples is ۱۵۰mm×۳۲mm×۱۲mm, which have been sewedby polyester yarn with different sewing arrangements, and experimentally examined under the three-point bendingtest. The sewing arrangements are named N, M, W, V according to the form of bindings. According to the obtainedresults, sewing of the core increases the shear stiffness of the core, but it can damage the core and reduce the strength ofthe sandwich panel. Among different sewing format, N sewing showed the highest strength and maximum corestiffness.

کلیدواژه ها:

composite sandwich panel ، sewed core ، shear stiffness