WILBERT

Wildauer Bücher+E-Medien Recherche-Tool

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 63 (1993), S. 59-72 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersich In dieser Arbeit wird der allgemeine Formalismus für die Feldgleichungen, die das dynamische Verhalten der fluidsaturierten Medien bestimmen, analysiert und für die Untersuchung der transienten Wellenbewegung ausgewertet. Es wird angenommen, daß beide Konstituierenden inkompressibel sind. Mit Hilfe der Laplacetransformation wird eine eindimensionale analytische Lösung abgeleitet, die als ein Resultat der Inkompressibilitätsbedingung nur eine unabhängige dilatante Wellenfortplanzung zeigt. Das fluidsaturierte poröse Material ist mit Charakteristiken versehen, die denen viskoelastischer Festkörper ähnlich sind. Diese Arbeit soll das weitere Verstehen der charakteristischen Eigenschaften der Wellenfortpflanzung in porösen Materialien erleichtern. Die Ergebnisse können zum quantitativen Vergleich mit verschiedenen numerischen Lösungen verwendet werden.
    Notes: Summary In this investigation, the general formalism for the field equations governing the dynamic response of fluid-saturated porous media is analyzed and employed for the study of transient wave motion. The two constituents are assumed to be incompressible. A one-dimensional analytical solution is derived by means of Laplace transform technique which, as a result of the incompressibility constraint, exhibits only one independent dilatational wave propagating in the solid and the fluid phases, respectively. The fluid-saturated porous material is supplied with characteristics similar to those occuring in viscoelastic solids. This work can provide the further understanding of the characteristics of wave propagation in porous materials and may be taken for a quantitative comparision to various numerical solutions.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Granular matter 2 (2000), S. 105-112 
    ISSN: 1434-7636
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The present paper outlines the macroscopic stress-strain behaviour of cohesionless soils by the example of dense Berlin Sand. Granular materials as sand show very complex stress-strain relations depending on the stress state and the load history. Examination of these relations is performed at a representative elementary volume (REV) consisting of a sufficient amount of particles. In triaxial tests quasi-static loads are applied to axisymmetric samples, representing the REV, with simultaneous measurement of the response of the granular structure. Within the constitutive equations of the elasto-plastic model, the elastic response is described by a materially non-linear elasticity law. Plastic deformations are considered in the context of a single-surface yield function with isotropic hardening properties. Non-associated flow is realized with an additional plastic potential function. Isotropic behaviour is assumed and the study is restricted to small strains. The parameter identification for the model under study is shown for dense Berlin Sand on the basis of triaxial tests.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Transport in porous media 9 (1992), S. 49-59 
    ISSN: 1573-1634
    Keywords: Porous media ; mixture theories ; volume fractions ; incompressible constituents ; granular solid matrix ; viscous pore liquid ; finite elastoplasticity ; kinematical hardening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract In this article, porous media theories are referred to as mixture theories extended by the well-known concept of volume fractions. This approach implies the diverse field functions of both the porous solid matrix and the pore fluid to be represented by average functions of the macroscale. The present investigations are based on a binary model of incompressible constituents, solid skeleton, and pore liquid, where, in the constitutive range, use is made of the second-grade character of general heterogeneous media. Within the framework of geometrically finite theories, the paper offers a set of constitutive equations for the solid matrix, the viscous pore liquid and the different interactions between the constituents. The constitutive model applies to saturated as well as to empty solid materials, taking into account the physical nonlinearities based on elasto-plastic solid deformations. In particular, the constitutive model concentrates on granular materials like soil or concrete, where the elastic deformations are usually small and the plastic range is governed by kinematically hardening properties.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...