Introducing mechanics [incomplete] by Brian Jefferson; Tony Beadsworth PDF

By Brian Jefferson; Tony Beadsworth

ISBN-10: 0199147108

ISBN-13: 9780199147106

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Kerridge ( 3 8 ) showed that transfer is the first step in the wear process. Hayler ( 3 9 ) has shown with several sliding systems that two conditions exist depending upon the temperature: oxide sliding against oxide, or metal against metal. The metal on metal condition is not due to the breakdown of the oxide, but rather to the transfer of metal on the surface of the oxide. Molgaard ( 4 0 ) discusses the role of oxide transfer as part of the wearing process. " Under certain circumstances metal may also be sliding against oxide.

The layers are rigidly bonded to the cylinder. So u (x, (-1)"-l Da) = w (x, ( - 1 f - I D ) = 0. a +o 1 contact d=O (13b) undeformed surface Moreover, it lies at hand to suppose that u, w, ux, uz, rxz -+ 0, far from the contact area. Therefore, we assume H -+ Ix I 0 with all derivatives if -+ 03. Finally, we assume that at the surface z = 0 u (x,O) def - u(x) = prescribed rx z(x , O ) def - r(x) = prescribed. u ndeformed surface X (14) (15) We shall use solutions of this type to construct the more complicated solutions we need.

If i is in B and di < 0, one such i will go to K ; otherwise K and B remain unchanged. Step 6. If K is changed in step 5 , then go to step 2. Step 7 . Now ui 5 0 in K , ui = 0 in B, di = 0 in K , di ? 0 in B: We are ready. Remark. This algorithm can be proved rigorously to converge towards the unique solution of (20) in a finite number of steps, see Kalker (1983, 1988). The number of iterations, though finite, may be large; actually it will be of the order of 4n, n: the number of elements in the contact area.

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Introducing mechanics [incomplete] by Brian Jefferson; Tony Beadsworth

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