6. consider a plate containing a center crack with 2a = 0.2 in. the yield stress of the material is 0o = 90 ksi. the plate is under remote tensile stress o = 30 ksi which is perpendicular to the center crack plane. answer the following questions: estimate the plastic zone size 2rp. (consider both the plane stress and the plane strain conditions) (0.0111 in, 0.0037 in) check the validation of linear elastic fracture mechanics (lefm) for this plate 6) sa, bih c) repeat the process in a) and b) for the yield stress 0o = 45 ksi. (0.0444 in, 0.0148 identify the relationship between 0 and 2rp. what is the effect of plate thickness on the plastic zone size.

Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?

What is the main objective of using reheat rankine cycle?

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.