Suppose the fracture toughness of a titanium alloy has been determined to be 44 mpa. m2, and a penny-shaped crack of diameter 1.6 cm is present in a plate used in uniaxial tension. calculate the maximum allowable stress that can be imposed without fracture. the yield stress of the material is 900 mpa, and the plate thickness is 5 cm.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?