Material Science

Q1 . a ) When two alloys ar in contact , pastEffective modulus (E ) at the interface is attached by the side by side(p) expression Where E1 and E2 be elastic modulus and ?1 and ?2 are Poisson s ratio of surface 1 and 2 respectivelyIn this difficulty , as both the admixtures in contact are uniform (CopperThereforeE1 E2 ECu cxl grade maculation average and ?1 ?2 ?Cu 0 .3Therefore GPaQ1 . b ) flexible emphasize at the yield focus or ?p is precondition by where , H is gruellingness of the surface and E is Elastic modulus of the metalHere , the metal is copper andHardness H 700 MPa andElastic modulus E 140 GPa 140 103 MPaTherefore , Elastic strain at the yield stress is Q2 .

When a conical indenter of a hard material ploughs onto a cushiony metal s surface , then normal bill (N ) is given by the following comparison where `r is one-half the voluminousness of the happen upon and H is toughness of the materialHere , Normal burden N 10 Nand Hardness H 700 MPa 700 106 N /m2ThereforeHalf the width of the bulls eye (r ) will be ThereforeWidth of the scratch 2r 190 ?mThe coefficient of travel clangour ) is given by the following equation0 .17Q3 ) Life of a testicle bearing is given by the following equationW3L constantWhere W is despatch and L is brio in number of cycles Where L1 and L2 are life of a Ball appearance at load W1...If you demand to get a large essay, order it on our website: Orderessay

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