12:00 Wednesday 3rd October 2018

STRUCTeam and Ruster Sports Optimisation of the New Dimond Bike Frame

This project was carried out by STRUCTeam for Ruster Sport for their new Dimond triathlon bike design. The objective was twofold; firstly to provide Ruster Sport with an understanding of complex load paths within the critical chainstay crotch area of the bike and to make basic recommendations with regards to local reinforcement; secondly, to validate Ruster's final laminates. Between these two phases, Ruster Sport carried out a reality check of what was achievable in terms of laminates, considering geometrical constraints in this area along with practicalities of the complex closed mould RTM process. Taking these constraints into account, together with STRUCteam’s recommendations, they were able to produce a realistic and structurally effective final laminate specification. This was then validated by STRUCTeam using appropriate safety margins for composite structures. STRUCTeam's approach consisted of developing design load cases to be implemented in a global beam finite element model of the frame. Chainstay loads were extracted from this global model and applied to a local shell finite element model of the frame chainstay, enabling detailed analysis of load paths within the critical crotch area. Interaction between STRUCTeam and Ruster Sports was key to the optimisation of the new Dimond bike frame product which was launched successfully at the end of 2016.

Frederic Louarn, STRUCTeam