Case Study: High-Performance Bicycle Frame

Project 1 — Design and structural validation for urban competition

Problem

A local manufacturer needed an ultralight road bicycle frame capable of withstanding dynamic loads without plastic deformation, while maintaining a weight under 1.2 kg. Existing designs failed fatigue tests after 10,000 cycles.

Approach

Parametric modeling in SolidWorks with finite element analysis (FEA) to optimize tube geometry and welded joints. 4130 steel and 6061-T6 alloys were evaluated, prioritizing the strength-to-weight ratio.

Implementation

12 design iterations were generated with variations in thicknesses and curvature radii. Each iteration was simulated under static and cyclic loads (ISO 4210 standard). The final version incorporated an internal reinforcement in the seat tube.

Result

Final frame weighing 1.15 kg, with a tensile strength of 780 MPa and a service life exceeding 50,000 cycles without failure. Manufacturing cost was reduced by 18% through material optimization.

Supporting Materials
  • 3D Technical Drawing
    Exploded view of the frame with dimensions and tolerances.
  • Fatigue Report
    S-N cycle graph showing failure point and safety margin.
  • Manufacturing Budget
    Cost breakdown by material, welding, and finishing.
  • Component Patent
    Patent application for the internal reinforcement system.

Client: UrbanCycle Components

Duration: 14 weeks (modeling + testing)

Engineering Process

From technical concept to patent, each stage follows a flow of mechanical modeling and structural validation.

01
Technical Requirement

Analysis of loads, materials, and mechanical frame geometry.

02
3D Modeling

Parametric design of bearings and structural joints in CAD.

03
FEM Simulation

Stress and fatigue analysis in high-grade steel.

04
Industrial Budget

Manufacturing quote with precision tolerances.

05
Prototyping

Physical validation of the frame and bearings on a test bench.

06
Patent and Delivery

Technical documentation and registration of precision components.

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