INVESTIGATION OF IMPACT BEHAVIOR OF CORRUGATED POLYMER SANDWICH STRUCTURE

Abstract

Fiber-reinforced plastic corrugated core sandwich panels were tested for low velocity impact using drop test method. Three types of epoxy based corrugation i.e sinusoidal, square and triangle of different core thickness and height of the drop were tested. Impact tests were conducted on corrugated sandwiches using a drop weight machine with an impactor mass of about 11.5 kg and different values of impact height 50, 63 and 76 cms, these hold initial impact energy 37, 56 and 64 J respectively. The impact response of corrugated core sandwich structures with sinusoidal, square and triangle profile having the thickness of 0.5mm 0.75mm and 1.0 mm has been evaluated. Sinusoidal and triangular core corrugated specimen causes less damages to lower face sheet compare to square profile, also delamination of lower face is more compare to top skin in all the three profiles.