Results 11 to 20 of about 2,146,941 (285)

Elucidation of mechanisms for stick slip melt fracture of polymer melt (Experimental analysis of unstable flow of high density polyethylene melt)

open access: yesNihon Kikai Gakkai ronbunshu, 2019
During polymer melt extrusion from a circular nozzle, the extrudate at low flow rate shows a stable linear shape with smooth surface but the extrudate at higher flow rate shows unstable shapes with spiral, rosary, or zig-zag structures.
Masao YAMAMOTO
doaj   +1 more source

Hot Deformation Characteristics of 18Cr-5Ni-4Cu-N Stainless Steel Using Constitutive Equation and Processing Map

open access: yesMetals, 2020
The hot deformation of 18Cr-5Ni-4Cu nitrogen-alloyed austenitic stainless steel was tested with a Gleeble-1500D simulator in the temperature range of 1273−1473 K and in the strain rate range of 0.01−10 s−1.
Xiao-yang Fu, Pu-cun Bai, Ji-chun Yang
doaj   +1 more source

Hot Compression Behavior of New Al-6Mg and Al-8Mg Alloy with Improved Hot Workability Fabricated by Direct Chill Casting Method

open access: yesMetals, 2021
A hot compression test of new Al-6Mg and Al-8Mg alloys was conducted to understand the dynamic recrystallization (DRX) behavior by Mg contents. To investigate the hot workability of Al-Mg with high Mg contents, the hot deformation behavior of Al-6Mg and ...
Nam-Seok Kim   +8 more
doaj   +1 more source

Development of Debris flow Vulnerability Curve for Data-driven Method [PDF]

open access: yesE3S Web of Conferences, 2023
Various landslide disasters due to abnormal climate are increasing all over the world, and the inflow of debris flow is causing great damage to human life and social infrastructure.
Song Chang-Ho   +4 more
doaj   +1 more source

Curve shortening flow coupled to lateral diffusion [PDF]

open access: yes, 2016
We present and analyze a semi-discrete finite element scheme for a system consisting of a geometric evolution equation for a curve and a parabolic equation on the evolving curve. More precisely, curve shortening flow with a forcing term that depends on a
Pozzi, Paola, Stinner, Björn
core   +1 more source

Upsetting Analysis of High-Strength Tubular Specimens with the Taguchi Method

open access: yesMetals, 2016
In order to obtain input data for numerical simulations of tube forming, the material properties of tubes need to be determined. A tube tensile test can only be used to measure yield stress and ultimate tensile stress.
Tomaž Pepelnjak   +2 more
doaj   +1 more source

State Parameter-Based Yield Strength Model for Integration in Finite Element User-Material Routines

open access: yesMetals, 2022
A new state parameter-based user-subroutine for finite-element software packages, which can be used to simulate microstructure-dependent stress–strain relations, is presented.
Bernhard Viernstein   +2 more
doaj   +1 more source

Exceedance probability of characteristic flows in Poland [PDF]

open access: yesActa Scientiarum Polonorum. Formatio Circumiectus, 2023
Aim of the study: The goals of this paper are: to determine the empirical exeedance probability of the characteristic flows Qchar (SNQ, WNQ, NSQ, SSQ, WSQ, NWQ and SWQ) in Poland; to link the flows Qchar with quantiles Qp and to examine the relationship
Katarzyna Baran-Gurgul
doaj   +1 more source

Influence of Aluminum Content on the Microstructure, Mechanical Properties, and Hot Deformation Behavior of Mg-Al-Zn Alloys

open access: yesMetals, 2023
This study compares AZ91 with AZ31 to investigate the influence of a higher Al content on the resulting microstructure, mechanical properties, and hot deformation behavior.
Marie Moses   +2 more
doaj   +1 more source

Active flows on curved surfaces [PDF]

open access: yesPhysics of Fluids, 2021
We consider a numerical approach for a covariant generalized Navier–Stokes equation on general surfaces and study the influence of varying Gaussian curvature on anomalous vortex-network active turbulence. This regime is characterized by self-assembly of finite-size vortices into linked chains of anti-ferromagnet order, which percolate through the ...
M. Rank, A. Voigt
openaire   +2 more sources

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