A cylindrical specimen of steel having an original diameter of 12.8 mm (0.505 in.) is tensile tested to fracture and found to have an engineering fracture strength o, of 460 MPa (67,000 psi). If its cross-sectional diameter at fracture is 10.7 mm (0.422 in.), determine: (a) The ductility in terms of percent reduction in area. (b) The true stress at fracture.

A cylindrical specimen of steel having an original diameter of 12.8 mm (0.505 in.) is tensile tested to fracture and found to have an engineering fracture strength o, of 460 MPa (67,000 psi). If its cross-sectional diameter at fracture is 10.7 mm (0.422 in.), determine: (a) The ductility in terms of percent reduction in area. (b) The true stress at fracture.

Elements Of Electromagnetics

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.

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Example 4
A cylindrical specimen of steel having an original diameter of 12.8 mm (0.505
in.) is tensile tested to fracture and found to have an engineering fracture
strength o, of 460 MPa (67,000 psi). If its cross-sectional diameter at fracture
is 10.7 mm (0.422 in.), determine:
(a) The ductility in terms of percent reduction in area.
(b) The true stress at fracture.
98

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