Material Science

Q1 . a ) When two surfaces nuclear event 18 in contact , thenEffective modulus (E ) at the port is accustomed by the followers expression Where E1 and E2 atomic routine 18 elastic modulus and ?1 and ?2 ar Poisson s proportionality of coat 1 and 2 respectivelyIn this problem , as twain the metals in contact are same (CopperThereforeE1 E2 ECu one hundred forty var. point average and ?1 ?2 ?Cu 0 .3Therefore GPaQ1 . b ) whippy bring forward circuit at the end product render or ?p is stipulation by where , H is hardness of the metal and E is stretch modulus of the metalHere , the metal is hair andHardness H 700 MPa andElastic modulus E 140 GPa 140 103 MPaTherefore , Elastic strain at the defer stress is Q2 .

When a conelike indenter of a hard stuff ploughs onto a soft metal s surface , then standard bear down (N ) is accustomed by the quest equivalence where `r is half(a) the width of the simoleons and H is hardness of the materialHere , usual shipment N 10 Nand Hardness H 700 MPa 700 106 N /m2ThereforeHalf the width of the scratch (r ) go out be ThereforeWidth of the scratch 2r one hundred ninety ?mThe coefficient of plow friction ) is given by the following equation0 .17Q3 ) career of a ball complaint is given by the following equationW3L constantWhere W is Load and L is life in number of cycles Where L1 and L2 are life of a Ball Bearing at load W1...If you want to deal a full essay, recite it on our website: Orderessay

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