Engineering Board Exam Reviewer · Engineering Materials · hard
A steel has a yield strength of 250 MPa and a modulus of elasticity of 200 GPa. What is its modulus of resilience?
- 312.5 kJ/m3
- 156.3 kJ/m3
- 0.6250 kJ/m3
- 0.1563 kJ/m3
Answer
B. 156.3 kJ/m3
Solution
Ur = y2/(2E) = 2502/(2 × 200,000) = 0.15625 MPa = 156250 J/m3 = 156.3 kJ/m3.
More Engineering Materials questions
- A tensile specimen with an original diameter of 12.8 mm has a diameter of 8.0 mm at the fracture neck. What is its percent reduction in…
- Steel has E = 200 GPa and = 0.3. What is its bulk modulus?
- Steel has E = 200 GPa and = 0.3. What is its shear modulus?
- A material with Poisson's ratio 0.3 has an axial strain of 0.001 in tension. What is its lateral strain?
- A steel rod 1.5 m long and 12 mm in diameter carries a tensile load of 20 kN. What is its elongation? (E = 200 GPa)
- A material shows a stress of 150 MPa at a strain of 0.00075 in the elastic region. What is its modulus of elasticity?
- A bar 2 m long elongates 1.5 mm under load. What is the engineering strain?
- The number of slip systems in an FCC metal is:
- In the FCC structure, the close-packed (most densely packed) planes belong to the family:
- A plane parallel to the y and z axes that intercepts the x-axis at 1 has Miller indices: