Structural Analysis of Bicycle Frame Using Composite Laminate

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2015 by IJETT Journal
Volume-28 Number-7
Year of Publication : 2015
Authors : Arun Sam Varghese, Sreejith N.K
DOI :  10.14445/22315381/IJETT-V28P262


Arun Sam Varghese, Sreejith N.K"Structural Analysis of Bicycle Frame Using Composite Laminate", International Journal of Engineering Trends and Technology (IJETT), V28(7),321-327 October 2015. ISSN:2231-5381. published by seventh sense research group

The frame of the bicycle is the main structure to support the external loads. Traditional materials of the bicycle frame are steel or aluminium alloy. For the purpose of reducing weight, the carbon/ epoxy composite materials are now widely used to make the bicycle frames. The structural analysis of the frame is a very important stage in the design process of the bicycle. Finite element method was adopted to analysis the structural behaviours of composite bicycle frame. Different stacking sequence and fiber direction have different impact on the failure index, i.e. the stress to strength ratio at different loading conditions. Hence an optimal ply design has to be done. The strength values of T300 carbon / epoxy composite are used in this study. On the basis of Maximum stress criterion, an optimal ply design for different loading conditions has been suggested in this work. The most effective stacking sequence of the composite frame is suggested on the basis of Failure index of the above mentioned criteria. Individual Ply failure is considered and the ply failure will occur when failure index value is greater than one. Bicycle frame modelling was done in CATIA V5 software. Shell element is used to model the composite bicycle frame. Two testing methods for the bicycle frame, i.e. frontal and vertical loads are adopted in the analysis. From the finite element analysis results, weak regions, that is regions with higher stress concentration are identified on the bicycle frame. In order to reduce this stress concentration, Structural changes are done on the frame work. Finite element analysis is again done on the frame work to validate the findings.


[1] Thomas Jin-Chee Liu, Huang-Chieh Wub ; Fiber direction and stacking sequence design for bicycle frame made of carbon/epoxy composite laminate.
[2] H. J. Chun , J. A. Lee 1, K. T. Kang ; Study of design variables with loading condition for composite laminate Bicycle Frame.
[3] Derek Covilla, Steven Begga, Eddy Eltona, Mark Milnea, Richard Morrisa, Tim Katza ; Parametric finite element analysis of bicycle frame geometries.
[4] Stanislaw Ochelski , Pawel Gotowicki ; Experimental assessment of energy absorption capability of carbon-epoxy and glass-epoxy composites.
[5] Alexandre Callensa , André Bignonnetb Fatigue design of welded bicycle frames using a multi axial criterion.
[6] Finite Element Analysis and Optmization of Automotive Composite Drive Shaft; S.V. Gopalakrishna, B. V. Subrahmanyam. IJETT V5 (7):346-351 Nov 2013.
[7] R. M. Johns, Mechanics of composite materials.

Carbon/Epoxy composite, Laminate code, Quasi-isotropic Laminate, Maximum Stress Theory, Design Parameter R.