Section: Solid Mechanics | Marks: 2
A cube, made of aluminum, of dimension 0.1 m × 0.1 m × 0.1 m, rests against a rigid wall (with normal in the y-direction), as shown in the figure. Another parallel rigid wall is located at a clearance of 0.2 mm from the block. Assuming all contacts to be frictionless, if the block is heated by 150 = ΔT °C, the normal stress yy σ induced in the block is (for aluminum GPa 70 = E ; 3.0 = ν ; / 10 20 6 − × = α °C)
- A. MPa 7 − = yy σ
- B. MPa 7 = yy σ
- C. MPa 70 − = yy σ
- D. 0 = yy σ
Answer: C. MPa 70 − = yy σ