Dynamic and Static Compression Tests for Paper Honeycomb Core and Absorbed Energy

In order to investigate the effect of loading rate on the strength and the absorbed energy of paper honeycomb cores, a series of compression tests were carried out at quasi-static and dynamic rates. The specimens used are polypropylene (PP) and polyester (PET) thermoplastic honeycomb cores, usually called paper honey comb cores. It was found that the peak stress and average crush stress increased with the increase of loading rate, especially, it was remarkable in the results of PP-core. The absorbed energy obtained from dynamic tests was also greater than that obtained at quasi-static rates. The polyvinyl chloride (PVC) long tube was ascertained to be quite useful for a device measuring stress waves in dynamic compression tests, if the manner of the wave propagation in the PVC tube such as the decreasing rate of the wave amplitude and the propagation velocity are obtained by wave propagation experiments beforehand.