Results 21 to 30 of about 216,858 (244)

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

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

Derivation of the Camassa-Holm equations for elastic waves [PDF]

open access: yes, 2015
In this paper we provide a formal derivation of both the Camassa-Holm equation and the fractional Camassa-Holm equation for the propagation of small-but-finite amplitude long waves in a nonlocally and nonlinearly elastic medium.
Erbay, Husnu Ata   +3 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

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

Stress relaxation and elastic follow-up using a stress range-dependent constitutive model [PDF]

open access: yes, 2012
Despite the availability of detailed nonlinear finite element analysis, some aspects of high temperature design can still be best addressed through more simplified methods.
Boyle, James
core   +1 more source

On a system of equations arising in viscoelasticity theory of fractional type

open access: yes, 2012
We study a system of partial differential equations with integer and fractional derivatives arising in the study of forced oscillatory motion of a viscoelastic rod.
Atanackovic, Teodor M.   +2 more
core   +1 more source

FE implementation of damage-coupled inelastic constitutive equation for P91 steel

open access: yesMechanical Engineering Journal
The objective of this study is to numerically evaluate the cyclic softening behavior and creep-fatigue damage of P91 steel. To achieve this, a damage-coupled inelastic constitutive equation is formulated by coupling the Chaboche-type viscoplastic ...
Masayuki ARAI, Akihiro MOTOKI
doaj   +1 more source

Application of non-contact strain measurement based on CCD camera in PMMA material constitutive model

open access: yesMaterials Research Express, 2021
The Jiangmen Underground Neutrino Observation (JUNO) will build a polymethyl methacrylate (PMMA) spherical vessel of a diameter of 35.4 meters. The constitutive model of PMMA is a key parameter for the design of PMMA structure.
Xiaohui Qian   +6 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

open access: yesFEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe   +3 more
wiley   +1 more source

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