Results 31 to 40 of about 1,459,185 (250)

A Modified Double Multiple Nonlinear Regression Constitutive Equation for Modeling and Prediction of High Temperature Flow Behavior of BFe10-1-2 Alloy

open access: yesHigh Temperature Materials and Processes, 2018
Constitutive analysis for hot working of BFe10-1-2 alloy was carried out by using experimental stress–strain data from isothermal hot compression tests, in a wide range of temperature of 1,023~1,273 K, and strain rate range of 0.001~10 s–1.
Cai Jun   +4 more
doaj   +1 more source

Modelling, identification and application of phenomenological constitutive laws over a large strain rate and temperature range [PDF]

open access: yes, 2013
A review of the different phenomenological thermo-viscoplastic constitutive models often applied to forging and machining processes is presented. Several of the most common models have been identified using a large experimental database (Hor et al., 2013)
GERMAIN, Guénaël   +3 more
core   +1 more source

Lack of controllability of the heat equation with memory [PDF]

open access: yes, 2012
We consider a model for the heat equation with memory, which has infinite propagation speed, like the standard heat equation. We prove that, in spite of this, for every T > 0 there exist square integrable initial data which cannot be steered to hit zero ...
Andrei Halanay, Pandolfi, Luciano
core   +1 more source

A Constitutive Equation for Predicting Elevated Temperature Flow Behavior of BFe10-1-2 Cupronickel Alloy through Double Multiple Nonlinear Regression

open access: yesHigh Temperature Materials and Processes, 2019
Constitutive analysis for elevated temperature flow behavior of BFe10-1-2 alloy was carried out by using experimental stress–strain data from isothermal hot compression tests on a Gleeble-3800 thermo-mechanical simulator, in a wide of temperature range ...
Cai Jun   +4 more
doaj   +1 more source

Prediction of FV520B Steel Flow Stresses at High Temperature and Strain Rates

open access: yesHigh Temperature Materials and Processes, 2015
In order to develop reliable constitutive equations for the simulation, the hot deformation behavior of FV520B steel was investigated through isothermal compression tests in a wide range of temperatures from 900 °C to 1100 °C at an interval of 50 °C and ...
Han Xiaolan   +4 more
doaj   +1 more source

Revealing the acoustic effects on heat transfer and material flow in ultrasonic assisted friction stir welding of dissimilar Al/Mg alloys

open access: yesJournal of Materials Research and Technology, 2023
Development of a reasonable constitutive equation is critical to realize accurate numerical prediction of ultrasonic vibration-assisted friction stir welding (UVaFSW) of dissimilar Al/Mg alloys and deepen the understanding of the synchronous interaction ...
Guanlan Zhang   +2 more
doaj   +1 more source

On the modelling of highly elastic flows of amorphous thermoplastics [PDF]

open access: yes, 2009
Two approaches to the kinematic structuring of constitutive models for highly elastic flows of polymer melts have been examined systematically, assuming either: (1) additivity of elastic and viscous velocity gradients or (2) multiplicability of elastic ...
Buckley, Christopher   +6 more
core   +1 more source

Effect of nitrogen content on the hot deformation behavior of 0Cr16Ni5Mo martensitic stainless steel

open access: yes工程科学学报, 2017
The hot deformation behavior of 0Cr16Ni5Mo martensitic stainless steel with different nitrogen contents was studied on a Gleeble3800 thermal machine. The true strain-stress curves and deformed microstructures of the tested steels were investigated.
ZHANG Bao-li   +4 more
doaj   +1 more source

Review of Creep Cavitation and Rupture of Low Cr Alloy and its Weldment [PDF]

open access: yes, 2013
This paper presents a review of creep cavitation and rupture of low Cr alloy and its weldment, particular in the heat-affected zone (HAZ). Creep damage is one of the serious problems for the high temperature industry.
Xu, Qiang   +6 more
core   +1 more source

Method of modeling viscoelastic properties of oriented polymer materials using multi-barrier theory

open access: yesНаучно-технический вестник информационных технологий, механики и оптики
The results of modeling deformation processes of uniaxially oriented polymer materials are presented. The discription of two-barrier model is given, according to which polymer macromolecules can be in three stable states. The constitutive equation of the
V. V Golovina, P. P. Rymkevich
doaj   +1 more source

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