Aluminum Composite Panel (ACP) is a type of flat panel that consists of two thin

Question

Aluminum Composite Panel (ACP) is a type of flat panel that consists of two thin aluminum sheets bonded to a non-aluminum core. ACPs are frequently used for external cladding of buildings (building facades), for insulation and for signage. Epcot's Spaceship Earth is an example of the use of ACP in architecture. It is a geodesic sphere composed of 11,324 ACP tiles. A 1.0 m long by 7 mm thick panel is constructed of two 0.4 mm thick aluminum panels with a low density polyethylene (LDPE) core. A 9000 Newton load is applied to the panel. The modulus of elasticity of the aluminum is 69 GPa, while the modulus of elasticity of the LDPE is 0.3 GPa.

a.) What is the area of the LDPE core? Answer: .0062 m^2

b.) What is the stress in the aluminum?

c.) What is the stress in the LDPE core?

Explanation / Answer

a) the area of the LDPE core = 0.007 * 0.885

                                                 = 0.0062 m2

b) the stress in the aluminum = 9000/0.0062

                                                 = 1.451 * 106 N/m2

c) the stress in the LDPE core = 9000/(1 * 0.007)

                                                 =   1.285 * 106 N/m2

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.