Get Computational Contact and Impact Mechanics: Fundamentals of PDF

By Tod A. Laursen

ISBN-10: 3642076858

ISBN-13: 9783642076855

ISBN-10: 3662048647

ISBN-13: 9783662048641

This booklet comprehensively treats the formula and finite point approximation of touch and effect difficulties in nonlinear mechanics. meant for college kids, researchers and practitioners drawn to numerical sturdy and structural research, in addition to for engineers and scientists facing applied sciences during which tribological reaction needs to be characterised, the publication comprises an introductory yet specified review of nonlinear finite aspect formulations earlier than facing touch and impression in particular. issues encompassed contain the continuum mechanics, mathematical constitution, variational framework, and finite point implementations linked to contact/impact interplay. also, very important and presently rising learn issues in computational touch mechanics are brought, encompassing such subject matters as tribological complexity, conservative therapy of inelastic influence interplay, and novel spatial discretization strategies.

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Extra resources for Computational Contact and Impact Mechanics: Fundamentals of Modeling Interfacial Phenomena in Nonlinear Finite Element Analysis

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61), one can also conclude that A and a are in fact the same physical entity, but expressed in different coordinates. The former is most naturally written in terms of V, while the latter is conveniently expressed in terms of v. 61) is taken with respect to spatial coordinates, and is therefore called the spatial velocity gradient. It is used often enough to warrant a special symbol, denoted here as I: I=Vv. 64) and W 1 T = Vav = "2[1 -I ]. 65) It is clear that d is the symmetric part of the velocity gradient, while w is the antisymmetric, or skew, portion.

91) 28 2. Finite Element Formulations in Nonlinear Solid Mechanics where 3: = cp(X, t). 91) c(t) is a relative rigid body translation between the original frame and observer *, while a relative rotation is produced by the proper orthogonal tensor Q(t). To observer *, the motion appears as defined by 3:* = cp*(X,t) = c(t) + Q(t)cp(X,t). 95) would be present. Clearly, I is not objective. 98) which shows us that d is objective. So, we have a spatial rate of strain object, d, which is objective. The question arises whether corresponding reference measures of rate are objective.

This can be readily done by extending the idea of pull-back and push-forward as discussed above, by appealing to the linear transformation R relating the rotated configuration to the spatial one. The rotated rate of deformation tensor iJ is therefore defined via iJ(X,t) = RT(X,t)d(fPt(X),t)R(X,t) =RT(dofPt)R. 3 Stress Definitions Appropriate for Large Deformations As might be suspected, increased generality in the definition of stress is necessary in the context of large deformations. A convenient approach to a broader understanding of this concept is to begin with the Cauchy stress tensor u, and to associate this object with the spatial configuration.

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Computational Contact and Impact Mechanics: Fundamentals of Modeling Interfacial Phenomena in Nonlinear Finite Element Analysis by Tod A. Laursen


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