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- Viscoplasticity abstract "Viscoplasticity is a theory in continuum mechanics that describes the rate-dependent inelastic behavior of solids. Rate-dependence in this context means that the deformation of the material depends on the rate at which loads are applied. The inelastic behavior that is the subject of viscoplasticity is plastic deformation which means that the material undergoes unrecoverable deformations when a load level is reached. Rate-dependent plasticity is important for transient plasticity calculations. The main difference between rate-independent plastic and viscoplastic material models is that the latter exhibit not only permanent deformations after the application of loads but continue to undergo a creep flow as a function of time under the influence of the applied load.The elastic response of viscoplastic materials can be represented in one-dimension by Hookean spring elements. Rate-dependence can be represented by nonlinear dashpot elements in a manner similar to viscoelasticity. Plasticity can be accounted for by adding sliding frictional elements as shown in Figure 1. In the figure E is the modulus of elasticity, λ is the viscosity parameter and N is a power-law type parameter that represents non-linear dashpot [σ(dε/dt)= σ = λ(dε/dt)(1/N)]. The sliding element can have a yield stress (σy) that is strain rate dependent, or even constant, as shown in Figure 1c.Viscoplasticity is usually modeled in three-dimensions using overstress models of the Perzyna or Duvaut-Lions types. In these models, the stress is allowed to increase beyond the rate-independent yield surface upon application of a load and then allowed to relax back to the yield surface over time. The yield surface is usually assumed not to be rate-dependent in such models. An alternative approach is to add a strain rate dependence to the yield stress and use the techniques of rate independent plasticity to calculate the response of a materialFor metals and alloys, viscoplasticity is the macroscopic behavior caused by a mechanism linked to the movement of dislocations in grains, with superposed effects of inter-crystalline gliding. The mechanism usually becomes dominant at temperatures greater than approximately one third of the absolute melting temperature. However, certain alloys exhibit viscoplasticity at room temperature (300K). For polymers, wood, and bitumen, the theory of viscoplasticity is required to describe behavior beyond the limit of elasticity or viscoelasticity. In general, viscoplasticity theories are useful in areas such as the calculation of permanent deformations, the prediction of the plastic collapse of structures, the investigation of stability, crash simulations, systems exposed to high temperatures such as turbines in engines, e.g. a power plant, dynamic problems and systems exposed to high strain rates.↑ ↑ ↑ ↑".
- Viscoplasticity thumbnail Viscoplastic_elements.svg?width=300.
- Viscoplasticity wikiPageID "17328425".
- Viscoplasticity wikiPageLength "45516".
- Viscoplasticity wikiPageOutDegree "103".
- Viscoplasticity wikiPageRevisionID "702884768".
- Viscoplasticity wikiPageWikiLink Alloy.
- Viscoplasticity wikiPageWikiLink Arrhenius_equation.
- Viscoplasticity wikiPageWikiLink Asphalt.
- Viscoplasticity wikiPageWikiLink Bingham_plastic.
- Viscoplasticity wikiPageWikiLink Boltzmann_constant.
- Viscoplasticity wikiPageWikiLink Burgers_vector.
- Viscoplasticity wikiPageWikiLink Category:Continuum_mechanics.
- Viscoplasticity wikiPageWikiLink Category:Plasticity_(physics).
- Viscoplasticity wikiPageWikiLink Continuum_mechanics.
- Viscoplasticity wikiPageWikiLink Creep_(deformation).
- Viscoplasticity wikiPageWikiLink Crystallite.
- Viscoplasticity wikiPageWikiLink Dashpot.
- Viscoplasticity wikiPageWikiLink Debye_frequency.
- Viscoplasticity wikiPageWikiLink Deformation_(mechanics).
- Viscoplasticity wikiPageWikiLink Dislocation.
- Viscoplasticity wikiPageWikiLink Dislocation_segment.
- Viscoplasticity wikiPageWikiLink Drag_coefficient.
- Viscoplasticity wikiPageWikiLink Equivalent_strain.
- Viscoplasticity wikiPageWikiLink Finite_strain_theory.
- Viscoplasticity wikiPageWikiLink Friction.
- Viscoplasticity wikiPageWikiLink Henri_Tresca.
- Viscoplasticity wikiPageWikiLink Hookes_law.
- Viscoplasticity wikiPageWikiLink Infinitesimal_strain_theory.
- Viscoplasticity wikiPageWikiLink International_Union_of_Theoretical_and_Applied_Mechanics.
- Viscoplasticity wikiPageWikiLink Irreversible_process.
- Viscoplasticity wikiPageWikiLink Isochoric_process.
- Viscoplasticity wikiPageWikiLink Kink-pair.
- Viscoplasticity wikiPageWikiLink Ludwig_Prandtl.
- Viscoplasticity wikiPageWikiLink Macroscopic_scale.
- Viscoplasticity wikiPageWikiLink Maurice_Lévy.
- Viscoplasticity wikiPageWikiLink Maxwell_material.
- Viscoplasticity wikiPageWikiLink Melting_point.
- Viscoplasticity wikiPageWikiLink Metal.
- Viscoplasticity wikiPageWikiLink Peierls_stress.
- Viscoplasticity wikiPageWikiLink Peierls_valleys.
- Viscoplasticity wikiPageWikiLink Phenomenological_model.
- Viscoplasticity wikiPageWikiLink Pinning_points.
- Viscoplasticity wikiPageWikiLink Plastic_strain.
- Viscoplasticity wikiPageWikiLink Plasticity_(physics).
- Viscoplasticity wikiPageWikiLink Polymer.
- Viscoplasticity wikiPageWikiLink Power_law.
- Viscoplasticity wikiPageWikiLink Saint-Venant.
- Viscoplasticity wikiPageWikiLink Series_and_parallel_circuits.
- Viscoplasticity wikiPageWikiLink Shear_modulus.
- Viscoplasticity wikiPageWikiLink Spring_(device).
- Viscoplasticity wikiPageWikiLink Standard_linear_solid_model.
- Viscoplasticity wikiPageWikiLink Strain_rate.
- Viscoplasticity wikiPageWikiLink Stress_(mechanics).
- Viscoplasticity wikiPageWikiLink Structural_load.
- Viscoplasticity wikiPageWikiLink Thermodynamics.
- Viscoplasticity wikiPageWikiLink Viscoelasticity.
- Viscoplasticity wikiPageWikiLink Viscoplasticity.
- Viscoplasticity wikiPageWikiLink Viscosity.
- Viscoplasticity wikiPageWikiLink Voce_law.
- Viscoplasticity wikiPageWikiLink Von_Mises.
- Viscoplasticity wikiPageWikiLink Von_Mises_yield_criterion.
- Viscoplasticity wikiPageWikiLink William_Prager.
- Viscoplasticity wikiPageWikiLink Wood.
- Viscoplasticity wikiPageWikiLink Work_hardening.
- Viscoplasticity wikiPageWikiLink Yield_(engineering).
- Viscoplasticity wikiPageWikiLink Yield_surface.
- Viscoplasticity wikiPageWikiLink Youngs_modulus.
- Viscoplasticity wikiPageWikiLink File:3StageCreep.svg.
- Viscoplasticity wikiPageWikiLink File:Creep_test.JPG.
- Viscoplasticity wikiPageWikiLink File:ELASTIC_PVISCO_solid.JPG.
- Viscoplasticity wikiPageWikiLink File:PVS_VISCOUS2.JPG.
- Viscoplasticity wikiPageWikiLink File:PVS_VISCOUS3.JPG.
- Viscoplasticity wikiPageWikiLink File:Relaxation.svg.
- Viscoplasticity wikiPageWikiLink File:Visco79.svg.
- Viscoplasticity wikiPageWikiLink File:Visco89.svg.
- Viscoplasticity wikiPageWikiLink File:Visco98.jpg.
- Viscoplasticity wikiPageWikiLink File:Viscoplastic_elements.svg.
- Viscoplasticity wikiPageWikiLinkText "Perzyna model".
- Viscoplasticity wikiPageWikiLinkText "Viscoplasticity".
- Viscoplasticity wikiPageWikiLinkText "elasto-viscoplasticity".
- Viscoplasticity wikiPageWikiLinkText "visco-plastically".
- Viscoplasticity wikiPageWikiLinkText "viscoplastic".
- Viscoplasticity wikiPageWikiLinkText "viscoplasticity".
- Viscoplasticity wikiPageUsesTemplate Template:Reflist.
- Viscoplasticity subject Category:Continuum_mechanics.
- Viscoplasticity subject Category:Plasticity_(physics).
- Viscoplasticity hypernym Theory.
- Viscoplasticity type Work.
- Viscoplasticity type Mechanic.
- Viscoplasticity comment "Viscoplasticity is a theory in continuum mechanics that describes the rate-dependent inelastic behavior of solids. Rate-dependence in this context means that the deformation of the material depends on the rate at which loads are applied. The inelastic behavior that is the subject of viscoplasticity is plastic deformation which means that the material undergoes unrecoverable deformations when a load level is reached. Rate-dependent plasticity is important for transient plasticity calculations.".
- Viscoplasticity label "Viscoplasticity".
- Viscoplasticity sameAs Q7935671.
- Viscoplasticity sameAs Viscoplasticité.
- Viscoplasticity sameAs m.043kgxh.
- Viscoplasticity sameAs Q7935671.
- Viscoplasticity wasDerivedFrom Viscoplasticity?oldid=702884768.
- Viscoplasticity depiction Viscoplastic_elements.svg.
- Viscoplasticity isPrimaryTopicOf Viscoplasticity.