Effect of layering layout on the energy absorbance of bamboo-inspired tubular composites

Gradient distribution of vascular structure made the bamboo wall so effective which improved load-bearing capacity such bio-mimicked energy absorption structures and modify crush behavior thin-walled composite tubes. In this research, influence layering design stacking sequence on behavior, failure mechanism absorbed bamboo-inspired GFRP tubes is assessed experimentally numerically. Quasi-static compression tests were conducted to explore seven permutations Coarse Woven (CW), Fine (FW), Unidirectional (UD) E/glass fiber sheets, taking into account longitudinal bundles strengthened by organic matrix. Samples fabricated employing a modified hand laying up method using mechanical pressure obtain better surface finishing interlaminar adhesion compared conventional methods. To evaluate corresponding crashworthiness parameters characterize crushing tubes, quasi-static axial compressive loading was done. The numerical simulations validated versus experiments commercial finite element (FE) LS-DYNA integrating material model 54. predicted load-displacement curves mechanisms FE analysis demonstrate acceptable correlations with visual observations during experimentation. Furthermore, parametric performed examine effect different distributions bundles. results revealed that bio-inspired depended substantially configuration design. outcomes showed combination woven unidirectional fibers, respectively, located in inner layer hoop direction provide optimal terms length efficiency, load Specific absorption, stable progressive crushing, manufacturing quality.