Question

There have been many attempts to manufacture and market plastic bicycles. All have been too
flexible. Which design-limiting property is insufficiently large?

Answer 1

Answer:

Flexibility is lack of stiffness. The stiffness of a structure depends on its shape and size, and

on the value of Young’s modulus E of the material of which it is made. In design for stiffness E is a

design-limiting property. In bicycle design the values of E offered by plastics are insufficiently large.

However if the plastic is reinforced with carbon or glass fiber the stiffness can be increased to a useful

level – high performance bicycles are made of carbon-reinforced plastic.

Explanation:

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