Ql(a) The design and construction of crash helmet as shown in Figure Qla are vit

Question

Ql(a) The design and construction of crash helmet as shown in Figure Qla are vital to reduce driver's injury risk. Crash helmets have been compulsory in Formula One racing since 1953. Initial design of crash helmet is made of cloths or leather. However, they are prone to wear and tear. Furthermore, safety protection provided by these helmets is limited. Outer Shell Liner (Fxum) Veratilation Sy stem Confot Pauling Visor Shield RN?Cntion System Figure Qla () As a design engineer, propose ONE (1) alternative material for the (I mark) (ii) Support your answer in Q1(a)(0) with FOUR (4) properties of the (4 marks) crash helmet's shell that is able to improve safety protection. material that you proposed. Another design engineer has proposed to use porcelain as the alternative material for crash helmet's shell. Analyze the suitability of using this material AND justify your answer by considering THREE (3) properties of porcelain. (b) 4 marks) (c) Suggest one material that is suitable to be used as crash helmet's visor and supnort with FOUR (4) properties.

Explanation / Answer

a) Fiber reinforced polymer(FRP) used fof crash helmet manufacturing

These materials possess superior mechanical properties such as 1)Impact resistance

2) strength

3)stiffness

4)Ability to carry loads

b) No, porcelain can not be used for crash helmet shell manufacturing because it 1)It is highly dense, hard and weights more.

2)Has low impact strength will easily break during accidents

3)Do not have considerable strength and stiffness and difficult to manufacture

C) visor can be made from polycarbonate

1)light weight

2)clear and colorless polymer

3)High impact strength

4)Scrath resistant

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---