Safe life fatigue analysis method Has a rigorous theoretical

Safe life fatigue analysis method Has a rigorous theoretical background in fracture mechanics Is rarely used in practice Is only used for nonmetallic machine elements All of the above None of the above DET to the only truly three dimensional static failure theory True False Moore test is used in fatigue life analysis to generate life data of a similar machined part loading data for combined two plane bending stresses life data of a polished coupon specimen d All of the above None of the above Super position considers Non-linear deformation large bending loads Combined loading effects All of the above None of the above steel (1600 MPa ultimate strength) coupon specimen under 900 MPa pure bending stress will crack after 27, 800 cycles 54, 200 cycles 46, 400 cycles 38,000 cycles None of the above An F-150 truck suspension tie rod arm is made from steel treated to 110 ksi ultimate strength, if the tie rod arm Marin factors are 0.777 and 0.842 due to size and surface treatment, what maximum bending stress can be applied while maintaining infinite life? 155 ksi 20 ksi 36 ksi 97 ksi None of the above S degrees is reasonable shaft rotation at a True False integration method can be used to determine bearing and gear deflections on a shaft True False

Solution

14) True . because all theiories all failures are only two dimensional except maximum distortion theory.

15.) option B.

loading data for combined two plane bending stress.

moore test machine will be like a lathe .two opposite ends of a test pieces are grasped by two co-axial

chucks.during testing bending moment is forced on the piece. this test obviously provides just a fatigue strength.

16) superposition considers only combined loading effects only . because according to theory of it it considers linear deformations and also consider individual bending moments. so the option C