Download Continuum Mechanics in Environmental Sciences and Geophysics by K. Hutter (eds.) PDF

By K. Hutter (eds.)

Modern continuum mechanics is the subject of this ebook. After its creation it is going to be utilized to a couple normal structures coming up within the environmental sciences and in geophysics. In huge lake/ocean dynamics strange results of the rotation of the Earth may be analyzed in linear/nonlinear strategies of a homogenous and inhomogenous water physique. robust thermomechanical coupling paired with nonlinear rheology impacts the movement of enormous ice sheets (such as Antarctica and Greenland) and ice cabinets. Its reaction to the climatic forcing in an environmental of greenhouse warming may possibly considerably impact the lifetime of destiny generations. The mechanical habit of granular fabrics lower than quasistatic loadings calls for non-classical combination suggestions and encounters in most cases complex elastic-plastic-type constitutive habit. Creeping movement of soils, consolidation techniques and floor water circulation are defined by way of such theories. fast shearing movement of granular fabrics result in constitutive relatives for the stresses which comprise fee self sustaining habit of Mohr-Coulomb sort including dispersive tension contributions as a result of particle collisions. Rockfalls, sturzstroms, snow and ice avalanches, but additionally particles circulation and sea ice drifting may be defined with such formulations.

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Extra resources for Continuum Mechanics in Environmental Sciences and Geophysics

Example text

Haupt Scalar multiplication with the velocity vector v yields pv · v = v · div T + pv · k. 35) With the product rule and v. , eq. 34) is equivalent to ~ ). = p( 2 div (TT v)- T · grad v + pk · v. 36) We note that this equation is an identity, valid if the local balance of linear momentum is satisfied. 36) by the volume element dV and integration over the whole volume of the body in the current configuration yields fv[div(Trv)+pk ·v-T·gradv] dV= fvP(~2 )" dlf. Application of the divergence theorem in the first term on the left-hand side and invoking the continuity equation (p dV)" = 0 on the right-hand side implies f (Tn)·vdA+ f JA lv k·vpdV= dd t f ~v 2 pdV+ f T· gradvdV.

4) or eq. 6) must hold for all parts of the body, which can be thought to be separated. In this sense we apply eq. 6) to a sequence of tetrahedra, which are shrunk down to a single point x. , the fourth surface has an arbitrary (but fixed) orientation n. 6) is now applied to this particular material body; in doing so, the integrals are calculated (in the sense of the mean-value-theorem), (i) as products of the volume times the integrand at an appropriate inner point or, (ii) as products of the plane surfaces times the values of the P.

24) To clarify the procedure is should be mentioned that a, aR, u and u R comprise contributions from two different physical origins: Source and supply terms from outside agents and production terms from inside the body. Equivalent local formulations correspond to the global balance relations, if sufficient smoothness properties of the related fields are assumed. For the derivations of local forms three steps must be carried out, namely • differentation of volume integrals, • transformation of surface integrals to volume integrals and • evaluation of continuity assumptions.

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