Material and process selection for a bicycle frame.

Added on - 18 Sep 2019

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Material and process selection for abicycle frameThe frame of any bicycle is considered to be the key element in itsstructure. As it is responsible of upholding most of the bicycle’scomponents such as the wheels, handles, axle, bars, etc. Therefore,spending time and effort to choose the right material is essential. In orderto do that, determining the objectives of the bicycle and uses areimportant, without it no final choice can be made.A road-racing bike is to be my option of many types. As a result, thechosen material must have three enquires: strength, weight andproperties.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 showedmaterials have fracture toughness less that 15 MPa (<15MPa).From above, CFRP (carbon fiber reinforced plastic) appears to be the most suitablematerial, as it has a low density and a reasonable price when compared with othermaterials. Adding that in order to make one bike frame, around 40 layers of CFRPare needed.1-Younge’s Modulus Vs. Tensile strength:
As previously mentioned, high stiffness and tensile strength are the most requiredproperties I seek in a material. As this material must have the ability to resistdeformation and fracture. The graph above emphases on the fact that CFRP is themost suitable material for a road-racing bike frame.1-Fatigue Strength: