Results 21 to 30 of about 8,196 (223)

Weak-strong uniqueness and energy-variational solutions for a class of viscoelastoplastic fluid models

open access: yesAdvances in Nonlinear Analysis, 2022
We study a model for a fluid showing viscoelastic and viscoplastic behavior, which describes the flow in terms of the fluid velocity and a symmetric deviatoric stress tensor.
Eiter Thomas   +2 more
doaj   +1 more source

Simulation of Lueders bands using regularized large strain elasto-plasticity

open access: yesArchives of Mechanics, 2021
This paper deals with the numerical simulation of an instability phenomenon called Lueders bands with two regularized material models: viscoplasticity and gradient-enhanced plasticity.
M. Mucha, B. Wcisło, J. Pamin
doaj   +1 more source

Analysis of Strain-Hardening Viscoplastic Wide Sheets Subject to Bending under Tension

open access: yesMetals, 2022
The present paper provides an accurate solution for finite plane strain bending under tension of a rigid/plastic sheet using a general material model of a strain-hardening viscoplastic material.
Sergei Alexandrov, Elena Lyamina
doaj   +1 more source

Finite Element Simulation of High-Speed Blow Forming of an Automotive Component

open access: yesMetals, 2018
High-speed blow forming (HSBF) is a new technology for producing components with complex geometries made of high strength aluminum alloy sheets. HSBF is considered a hybrid-superplastic forming method, which combines crash forming and gas blow forming ...
Omid Majidi   +2 more
doaj   +1 more source

Reproduction and evaluation of temperature- and strain-rate-dependent nonlinear material behavior of thermoplastic resin by hybrid parameter identification method for a viscoelastic-viscoplastic-damage constitutive model

open access: yesNihon Kikai Gakkai ronbunshu, 2022
Thermoplastic resins, which can be used for matrix materials in fiber reinforced thermoplastics (FRTP), have distinctive nonlinear characteristics that depend on temperature and strain rate compared to conventional materials such as metals and thermosets.
Masato SOMEMIYA   +5 more
doaj   +1 more source

Membrane viscoplastic flow

open access: yesBiophysical Journal, 1976
In this paper, a theory of viscoplasticity formulated by Prager and Hohenemser is developed for a two-dimensional membrane surface and applied to the analysis of the flow of "microtethers" pulled from red blood cells attached to glass substrates. The viscoplastic flow involves two intrinsic material constants: yield shear and surface viscosity.
Evans, E.A., Hochmuth, R.M.
openaire   +2 more sources

Hardening and Dynamic Recovery During Hot Compression Test of Copper Simulated as Viscoplastic Material [PDF]

open access: yesMaterials Research, 2019
The Norton-Bailey equation was used to simulate by finite elements the hardening and dynamic recovery of copper during the hot compression tests. The constants of Norton-Bailey equation were determined from the Voce-Kocks model.
Gabriel Torrente Prato
doaj   +1 more source

A Coupled Nonlinear Viscoelastic–Viscoplastic Thermomechanical Model for Polymeric Lithium-Ion Battery Separators

open access: yesBatteries, 2023
One of the major concerns in ensuring lithium-ion battery (LIB) safety in abuse scenarios is the structural integrity of the battery separator. This paper presents a coupled viscoelastic–viscoplastic model for predicting the thermomechanical response of ...
Royal Chibuzor Ihuaenyi   +3 more
doaj   +1 more source

Hydrodynamics and Metzner-Otto correlation in stirred vessels for yield stress fluids [PDF]

open access: yes, 2006
This paper investigates the hydrodynamics and power consumption in laminar stirred vessel flowusing numerical computation. The Metzner–Otto correlation was established for mixing in power-law fluids.
Anne-Archard, Dominique   +2 more
core   +2 more sources

Creep characteristics and constitutive model construction of offshore soft soils

open access: yesJournal of Traffic and Transportation Engineering (English ed. Online)
The main objective of this study was to investigate creep characteristics and construct a suitable constitutive model for soft soils in offshore areas. Soft soil samples were obtained to evaluate the physical and mechanical properties.
Hainian Wang   +5 more
doaj   +1 more source

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