Ashaft is loaded in bending and torsion such that ma = 70 n. m, ta=45 n. m, mm=55 n. m, and tm = 35 n. m. for the shaft, su = 700 mpa and sy=560 mpa, and a fully corrected endurance limit of se=210 mpa is assumed. let kf=2.2 and kfs=1.8. with a design factor of 2.0 determine the minimum acceptable diameter of the shaft using the (a) de-gerber criterion. (b) de-asme elliptic criterion. (c) de-soderberg criterion. (d) de-goodman criterion. discuss and compare the results.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed