Experimental study on the impact load of internally supported gelatin bird projectiles

In accordance with the requirement to use gelatin bird projectiles instead of real birds for impact tests, four kinds of gelatin bird projectiles with length-to-diameter ratios of 2 were prepared. In addition to one unsupported projectile, three of the projectiles were strengthened using polyethylene foamed plastic as an inner support(cruciform internally supported, fishbone internally supported, and cylindrical internally supported projectiles). Impact tests were conducted using a rigid target, and the impact load?time curves at different impact velocities were obtained for each projectile. The relationship between the shape of the gelatin bird before impact and the curve of the impact load was studied, and the variation in the impact load?time curve of the gelatin bird projectiles under the same impact velocity was analyzed. The results show that the unsupported gelatin bird projectile produces ?peanut?tadpole?jet flow? shapes during the deformation process, and produces a highly distorted impact load?time curve. The polyethylene foamed plastic support structures maintained the length-to-diameter ratio of the gelatin bird projectiles to a certain extent, and produced better impact curves.

Automated summary

By using gelatin bird projectiles for impact tests, it was found that internal support structures can improve impact curves, with polyethylene foamed plastic support producing the best results.