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In this research, high strain rate response and energy absorption characteristics under dynamic compression loading of five different bio-composites were studied using a compression split Hopkinson pressure bar (SHPB) and DIC (digital image correlation) technique. This study is to map suitability of plant-based materials instead of petroleum-based plastic as a constituent raw material in composites. Bio-composites panels were made from Southern yellow pine (SYP), Corn starch (CS), and Methylene diphenyl diisocyanate (MDI) using a Dieffenbacher hot press. The ability of non-contact DIC analysis served as a valuable tool to measure the strains over a large range of deformation in wood-based bio-composites subjected to high strain rate compressive loading. Among all, Material 2 bio-composite with high manufacturing pressure had highest peak strength, shows that material behaviour at high strain rates is strongly dependent on the manufacturing pressure during fabrication. Presence of corn starch marginally increased the energy absorption capacity. [ABSTRACT FROM AUTHOR]

In this paper, dynamic response and energy absorption characteristics of three different types of wood-based biocomposites have been investigated using a split Hopkinson pressure bar (SHPB). Different types of biocomposite panel were produced using a Dieffenbacher hot press with a particular composition of refined cotton motes, pure cotton, and sweet potato flour. The strain induced in the specimen under dynamic stress equilibrium was obtained using the SHPB. Impact event at the zone of specimen was captured using a Shimadzu HPV-2 high-speed video camera. Digital image correlation (DIC) was performed using Proanalyst to obtain the strain in the specimen. Excellent agreement was found between the strains obtained using the SHPB and DIC analysis over three strain rates on three types of biocomposites. The biocomposite produced with cotton motes had the highest ultimate strength and specific energy absorption among three different types of biocomposites tested in this study. [ABSTRACT FROM AUTHOR]