Question

While designing a component, you have generated the loading condition shown below. You want to make sure your design is able to last for a minimum life span of 105 cycles, but you haven’t finalized the length, cross-section, or specific load. Find the allowable load F by considering only normal stresses. After further consideration you determine the following, L = 1 m , θ = 45°, b = 3 cm, and h = 4 cm. Determine the maximum Load to prevent fatigue failure. n = 1.5, Sut = 90 MPa, Se = 45 MPa.

0 L

Answer 1

fusu5 1400 Esings • 1 yen 2cm - Im in the beim due to lawhich firbre kell bottom fusus will induce bending top fibre will be in the engron and Compression. (Fusus)zLxY Hence bendings I 20,000 F, 2 fe xlovo x 20 + I bendo Ibh 12 X 30x403 Topfish later fin Newton 0 883 F obending = bottom for obending Compa 2-.08836 5.89410" F 2 fsinur ARG 40720 6 anial = reading of 6 anal 6mxa Lead in &.08898 F . F 2-.08834+ 5.89x0h, 6 benda tossud 7..0898 f 7

Sut Croso se A asut S 10 106 N from straight line equation bleu Aand 3. (4-4)= m(un) (2 7 Sut) = . Sut - Sut (105-0) 100 - 0 Sut ISUL xlor 90 a +105 loro 89.058 MPa 08898 F = 89.055 oma We have a loro 842 N