Amachine component is to be designed for a life of 10° cycles. the working load will be cyclic and t100 mpa. a material has been chosen which follows basquin's law for high- cycle fatigue, i. e. ao(v; )-c, where a 0., ci 850mp2 and aois the cyclic stress range. the ultimate tensile strength for this material is 450 mpa it is anticipated that during manufacture and assembly, there will be some residual stress in the component. estimate the maximum mean stress allowable if the component is to retain a life of 100 cycles b) describe one technique for estimating the fatigue life of components which are subjected to a number of different loading regimes. c) describe briefly how you would deal with a stress concentration, such as a grooved shaft, when estimating the fatigue life of a component. d) during a routine inspection a crack is discovered in a component. outline how you would determine whether the component could be kept in service and for how long it could be kept in service

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

According to the tide table below what time of day will the highest tide occur?

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt, c and rt, h, and qin, as where rtot rt, c rt, h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc, n 0.05 k/w and rh, n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh, d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th, i tc, i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc