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By Th. Lehmann (auth.), Dr.-Ing., Dr. rer. nat. Otto S. Brüller, Dr.-Ing. Volker Mannl, Dr.-Ing. habil. Jerzy Najar (eds.)

ISBN-10: 3540539883

ISBN-13: 9783540539889

ISBN-10: 3642488900

ISBN-13: 9783642488900

Recognized authors contributed to this number of unique papers from all fields of study in continuum mechanics. unique emphasis is given to time established and self sustaining everlasting deformations, harm and fracture. a part of the contributions is devoted to present efforts in describing fabric habit in regards to, e.g., anisotropy, thermal results, softening, ductile and brittle fracture, porosity and granular constitution. one other half offers with numerical facets coming up from the implementation of fabric legislation within the calculations of forming procedures, soil mechanics and structural mechanics. purposes of conception and numerical equipment belong to the subsequent parts: comparability with experimental effects from fabric checking out, steel forming lower than thermal and dynamic stipulations, failure by means of harm, fracture and localized deformation modes. the range of taken care of subject matters offers a survery of the particular examine in those fields; consequently, the ebook is addressed to these attracted to detailed difficulties of continuum mechanics in addition to to these attracted to a common knowledge.

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J. , A/Solids 9 (1990) (jn print) [11] Haupt, P. : On the Application of Dual Variables in Continuum Mechanics; Cont. Mech. Thel"lllOd. : Some Thermodynamical Considerations on Inelastic Deformations Including Damage Pl"Ocesses; Acta Mech. : Thermodynamical Foundations of Large Inelastic Deformations of Solid Bodies Including Damage; Int. J. Plasticity, 6 (1990) (in pl"int) [14] Seth. : Generalized Strain Measure with Application to Physical Problems; in: Second Order Effects in Elasticity, Plasticity and Fluid Dynamic (Reinel·.

For instance, Murakami and Sawczuk found in (3), that for the model of prestrained plastic solids the flow theory of classical plasticity only furnishes restricted forms of constitutive equations. In (4) Lehmann proposed an extended form of the classical flow rule (4) with respect to experimental results and based upon thermodynamical considerations. In (5) oriented solids are considered and an appropiate modification of the classical flow rule (4) is discussed. 3. Oriented Solids In order to describe yielding and failure of oriented solids Boehler and Sawczuk (6,7) use the tensor generator A = v (8) v, where the vector v specifies a privileged direction.

P and the total free energy then becomes if! Now we introduce the pressure in the usual way by 1 P = -3 tru . =~JIlIn P Po (19) as an independent variable for the change of volume. Therefore we can write p = p(v,T). p =- Jp(v,T)dv. (22) 29 Bednarczyk, Sansour, Germany 3, The Invariants From the identity /(1 and /(2 _ 1/3 F F=//IF -m' IIIF (23) where F is the deformation gradient and I/IF the determinant of F, we infer that F"=~ I/I1/3 (24) F describes an isochoric deformation since det F" = 1. Furthermore, using I/I~ define an 'isochoric' left Cauchy-Green tensor by B" = F"F"T = FFT III~f3 III~f3 = ~ III:/ 3 • = I/ID, we can (25) This tensor can be regarded as a strain deviator in the nonlinear case.

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Advances in Continuum Mechanics: 39 Papers from International Experts Dedicated to Horst Lippmann by Th. Lehmann (auth.), Dr.-Ing., Dr. rer. nat. Otto S. Brüller, Dr.-Ing. Volker Mannl, Dr.-Ing. habil. Jerzy Najar (eds.)

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