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Material and Process Selection for a Bicycle Frame

Added on -2019-09-18

The article discusses the importance of choosing the right material and process for a bicycle frame. It analyzes the constraints and objectives that the frame should fit and presents graphs that compare different materials based on their properties. The article concludes that CFRP is the best material for a road-racing bike frame and recommends the use of phenolic adhesives for joining. It also provides information on the recommended shaping process for CFRP.
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Material and process selection for abicycle frameThe frame of any bicycle is considered to be the key element in its structure. As it is responsible of upholding most of the bicycle’s components such as the wheels, handles, axle, bars, etc. Therefore, spending time and effort to choose the right material is essential. In order to do that, determining the objectives of the bicycle and uses are important, without it no final choice can be made. A road-racing bike is to be my option of many types. As a result, the chosen material must have three enquires: strength, weight and properties. Constrains and objectives the frame should fit:Light weighted frame.High tensile strength.Flexibility: to absorb road vibration. High fatigue strength.Low toughness.Low elongation. High stiffness.Comfortable.Free variables:Cost.Color.
Graphs:1-Price Vs. Density:This graph illustrates the price of the materials against their densities. All showed materials have fracture toughness less that 15 MPa (<15MPa). From above, CFRP (carbon fiber reinforced plastic) appears to be the most suitable material, as it has a low density and a reasonable price when compared with other materials. Adding that in order to make one bike frame, around 40 layers of CFRP are needed.1-Younge’s Modulus Vs. Tensile strength:
As previously mentioned, high stiffness and tensile strength are the most required properties I seek in a material. As this material must have the ability to resist deformation and fracture. The graph above emphases on the fact that CFRP is the most suitable material for a road-racing bike frame.1-Fatigue Strength:

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