Alarge plate is fabricated from a steel alloy that has a plane strain fracture toughness of kic = 82.4 mpa√m. if the plate is exposed to a tensile stress of 345 mpa during service use, determine the minimum length of a surface crack that will lead to fracture. assume a value of 1.0 for y.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false