Virtual model of kenaf bast fibres based on solid mechanics and finite element study

Abstract

Kenaf fibres are gaining traction as a promising eco-friendly material due to their renewability and impressive mechanical strength. This study explored kenaf's potential to replace traditional materials by investigating its microstructure using advanced techniques like Scanning Electron Microscopy, X-Ray Microtomography and Atomic Force Microscopy. These analyses were complimented with tensile tests to investigate the complex mechanical behaviour of kenaf fibres. The experimental results revealed the microstructure of kenaf fibres, showing no significant differences over the fibre width and longitudinal direction. Tensile tests results from tensile-cyclic and tensile-relaxation modes, suggest elasto-viscoelastic behaviour of the fibres. A finite element model to virtually represent kenaf fibres was developed using the experimental information. Model simulations under tensile, compression and shear deformations suggest that damage was more pronounced under shear and compression conditions compared to tensile mode.