Bicycle frame from hemp fibre filament wound composites

  • Arisara Chaikittiratana King Mongut's University of Technology North Bangkok
  • Sacharuck Pornpeerakeat King Mongkut’s University of Technology North Bangkok
  • Kerati Suwanpakpraek Mongkut’s University of Technology North Bangkok
  • Sitthichai Limrungruengrat King Mongkut’s University of Technology North Bangkok
  • Joshua Dietz-Röthlingshöfer Chemnitz University of Technology

Abstract

This work presents an initial study for hemp fibre produced in Thailand. The study focuses on the application of the filament winding technique in the production of hemp-epoxy composite tubes for a bicycle frame. The motivation is to produce hemp fibre composites from locally available resources in Thailand. For the initial trail, existing bicycle steel tubes were replaced by ±45° filament wound hemp-epoxy composites with thin aluminium inner layers. The mechanical properties of the hemp-epoxy composites were studied according to the ASTM standard. Two static load cases were chosen and considered for a 100 kg cyclist sitting on the saddle and pedalling while standing. The internal forces and moments were calculated for the frame and frame tubes. The stress and buckling analyses were performed using the finite element method for frame tubes considering the above loading cases. The finite element analysis shows that hemp-epoxy composite tubes with ±45° fibre orientation can be used as bicycle frame tubes and meet the design specifications under the considered static load conditions. The filament winding process was accomplished successfully at KMUTNB using an automated desktop filament winding machine.

Author Biography

Arisara Chaikittiratana, King Mongut's University of Technology North Bangkok

Assistant Professor  Arisara Chaikittiratana is currently working as a senior lecturer at the Department of Mechanical and Aerospace Engineering, KMUTNB. 

At present she is the lead coordinator of KMUTNB-TU Chemnitz Lightweight Structures Technologies Collaborative Center. 

Published
2020-11-10