Quasi-static and impact compression properties of glubam at different relative humidity conditions

Glued laminated bamboo (glubam), a product of bamboo lamination, presents a distinctive combination of eco-friendliness and mechanical strength. This study delves into the quasi-static and dynamic compression behaviour of glubam, examining the influence of key factors such as moisture content and carbonization. The experiment involved one control group and two groups of different carbonized degrees, with two relative humidity controls set at 65 % and 85 %. The results of the quasi-static compression tests revealed that higher moisture content reduced the ultimate stress and modulus of compression while enhancing the ductility of thick-strip glubam. Cross bamboo alignment bolstered the compressive strengths of longitudinal thin-strip glubam and provided considerable compressive capacity for transverse thin-strip glubam. Poisson’s ratios of glubam were also determined. During drop-tower impact testing, an input energy of 209.5 J resulted in the determination of the dynamic ultimate stress of glubam. The application of reasonable image procedures, supported by high-speed camera collections, aided in the efficient presentation of absorbed energy. Scanning electron microscope (SEM) images were employed to explore experimental results through the microstructure perspective.