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By P. Podio-Guidugli

I are looking to thank R. L. Fosdick, M. E. Gurtin and W. O. Williams for his or her particular feedback of the manuscript. I additionally thank F. Davi, M. Lembo, P. Nardinocchi and M. Vianello for invaluable feedback triggered through their examining of 1 or one other of the numerous prior drafts, from 1988 so far. because it has taken me see you later to carry this writing to its current shape, many different colleagues and scholars have episodically provided helpful reviews and stuck errors: a listing may probability to be incomplete, yet i'm heartily thankful to all of them. ultimately, I thank V. Nicotra for skillfully reworking my hand sketches into book-quality figures. P. PODIO-GUIDUGLI Roma, April 2000 magazine of Elasticity fifty eight: 1-104,2000. 1 P. Podio-Guidugli, A Primer in Elasticity. © 2000 Kluwer educational Publishers. bankruptcy I pressure 1. Deformation. Displacement allow eight be a three-d Euclidean area, and permit V be the vector house linked to eight. We distinguish some degree p E eight either from its place vector p(p):= (p-o) E V with appreciate to a selected beginning zero E eight and from any triplet (~1, ~2, ~3) E R3 of coordinates that we might use to label p. additionally, we endow V with the standard internal product constitution, and orient it in a single of the 2 attainable manners. It then is smart to contemplate the interior product a .

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5), both an exact and a linearized equilibrium problem can be fonnulated with those data. 17) a relation that allows for qualitative estimates of the solution that are independent of the constitutive law (Exercise 2). 18) of the reference shape can always be found such that Mo(Q, r) E Sym. 19) * The general question of consistency between exact and linearized 3-dimensional elastostatics was posed by A. Signorini in the thirties. By means of formal asymptotic expansions of the type already introduced by the Cosserat brothers, Signorini found consistency conditions, as well as instances of inconsistency, that were later variously generalized, and given both mechanical and geometrical interpretation.

Normal and Shear Forces Given a region /R C 8 and a vector field s over a/R, consider a symmetric-valued, smooth tensor field T over /R such that, for n the exterior normal to a/R, divT = 0 in /R, Tn = s in a/R. 1) is largely underdetermined, and accordingly has many solutions. 1) are uniquely determined by the boundary datum. We shall now list the most significant of those solutions, each of which we shall interpret as the stress field over the deformed region occupied by a body in an equilibrium deformation maintained solely by the surface load s.

3). 12, Exact and Linearized Equilibrium Theories In the preceding chapter we have given the linear analysis of deformation and strain a presentation motivated and made consistent with the corresponding exact analysis by the systematic use of an explicit linearization procedure. In this section we discuss the relationships between the exact and linear analyses of equilibrium in the mechanics of Cauchy solids, to the extent such a discussion can have without making any constitutive choice. The linear theory of equilibrium of linearly elastic solids will be dealt with in our fourth and last chapter.

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