Effects of stick–slip transition on polymer melt apparent shear viscosity measurement

2019 ◽  
Vol 136 (48) ◽  
pp. 48230 ◽  
Author(s):  
Yinglan Zhang ◽  
Xiaoping Song ◽  
Ying Kan ◽  
Mengmeng Huang ◽  
Cuijie Shi ◽  
...  
Keyword(s):  
Shear Viscosity ◽  
Polymer Melt ◽  
Viscosity Measurement ◽  
Stick Slip ◽  
Slip Transition

Stick-Slip Transition at Polymer Melt/Solid Interfaces

1995 ◽  
Vol 75 (14) ◽  
pp. 2698-2701 ◽  
Author(s):  
Patrick P. Drda ◽  
Shi-Qing Wang
Keyword(s):  
Polymer Melt ◽  
Stick Slip ◽  
Slip Transition

Experimental Investigation of Power Umbilical Damping

2017 ◽  
Author(s):  
Torfinn Ottesen
Keyword(s):  
Steady State ◽  
Energy Input ◽  
State Energy ◽  
Seawater Temperature ◽  
Structural Damping ◽  
Stick Slip ◽  
Slip Regime ◽  
Free Decay ◽  
Vortex Induced Vibrations ◽  
Slip Transition

Ocean currents may cause vortex induced vibrations (VIV) of deep-water umbilicals and cables. Since the VIV response may give significant contributions to the total fatigue damage it is important to know the structural damping for relevant curvature levels. A laboratory test has been performed on a 12.5 m long test specimen to determine the damping for a range of curvature levels that are in the vicinity of the stick-slip transition region. The energy input to maintain steady state oscillations with curvature amplitudes in the range 0.0002–0.001 m−1 was measured. The steady state energy input is consistent with damping ratios obtained using the free decay method. The structural damping depends on construction temperature and curvature and is less for typically low seawater temperature and low curvatures. The transition between the stick- and the slip regime is seen for typical seawater temperature.

Ultraslow frictional sliding and the stick-slip transition

2018 ◽  
Vol 113 (24) ◽  
pp. 241602 ◽  
Author(s):  
Alexander Breki ◽  
Michael Nosonovsky
Keyword(s):  
Stick Slip ◽  
Frictional Sliding ◽  
Slip Transition

Resolving the Unique Invariant Slip-Direction in Rigid Three-Dimensional Multi-Point Impacts at Stick-Slip Transitions

2018 ◽  
Author(s):  
Abhishek Chatterjee ◽  
Alan Bowling
Keyword(s):  
Single Point ◽  
Three Dimensional ◽  
Impact Behavior ◽  
Slip Direction ◽  
Stick Slip ◽  
Impact Forces ◽  
Post Impact ◽  
Impact Problems ◽  
Slip Transition ◽  
The Impact

This work presents a new approach for resolving the unique invariant slip direction at Stick-Slip Transition during impact. The solution method presented in this work is applicable to both single-point and multi-point impact problems. The proposed method utilizes rigid body constraints to resolve the impact forces at all collision points in terms of a single independent impact forces parameter. This work also uses an energetic coefficient of restitution to terminate impact events, thereby yielding energetically consistent post-impact behavior.

Superfluid-Like Stick−Slip Transition in Capillary Flow of Linear Polyethylene Melts. 1. General Features

1996 ◽  
Vol 29 (7) ◽  
pp. 2627-2632 ◽  
Author(s):  
Shi-Qing Wang ◽  
Patrick A. Drda
Keyword(s):  
Capillary Flow ◽  
Stick Slip ◽  
Linear Polyethylene ◽  
Polyethylene Melts ◽  
Slip Transition

scholarly journals Effects of solvent sort on casting solution and morphology of poly(ether sulfones) filtration membrane

2020 ◽  
Author(s):  
Kai Fan ◽  
Chun Liu ◽  
Haijun Yang ◽  
Zhengchi Hou
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
Shear Viscosity ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Viscosity Measurement ◽  
Micro Structure ◽  
Filtration Membranes ◽  
Filtration Membrane ◽  
Thermodynamics And Dynamics

Abstract Four kinds of solvent were chosen to prepare poly(ether sulfones) (PES) filtration membranes by the nonsolvent induced phase separation (NIPS) method. Ternary phase diagram and shear viscosity measurement were conducted to analyse the formation of prepared membrane from thermodynamic and kinetic perspectives. The micro-structure of the membranes with different solvents were analysed, and the result showed a high relevance to the thermodynamics and dynamics of the casting solutions, and promoted the proposal of a reasonable membrane formation mechanism.

scholarly journals Viscosity measurement of polypropylene loaded with blowing agents (propane and carbon dioxide) by a novel inline method

2019 ◽  
Vol 56 (1) ◽  
pp. 73-88
Author(s):  
Raphael Vincent ◽  
Martin Langlotz ◽  
Matthias Düngen
Keyword(s):  
Carbon Dioxide ◽  
Single Phase ◽  
Polymer Melt ◽  
Viscosity Measurement ◽  
Viscosity Reduction ◽  
Phase System ◽  
Melt Temperature ◽  
Blowing Agents ◽  
Foam Extrusion ◽  
Blowing Agent

Decreased viscosity due to the influence of blowing agent in thermoplastic polymer melts is a key issue for understanding the process of foam extrusion. In a process for direct foam extrusion, a novel approach for inline viscosity measurement of single-phase systems in single screw extruders is used to experimentally evaluate a viscosity decrease. Two blowing agents (propane and carbon dioxide) are tested for their effect on the viscosity of a polypropylene melt. While mass fractions of blowing agent below [Formula: see text] show little to no effect in regard to viscosity reduction compared to a pure polymer melt, a mass fraction of [Formula: see text] already results in significantly decreased viscosity values. While melt temperature influences the viscosity of the polymer melt, measurements show no significant additional effect in regard to a lowered viscosity of a single-phase system of polymer and fully dissolved blowing agent.

scholarly journals Presenting Static Friction Sensation at Stick-slip Transition using Pseudo-haptic Effect

2019 ◽  
Author(s):  
Yusuke Ujitoko ◽  
Yuki Ban ◽  
Koichi Hirota
Keyword(s):  
Static Friction ◽  
Stick Slip ◽  
Slip Transition

Normal load, slip rate and roughness influence on the polymethylmethacrylate dynamics of sliding 1. Stable sliding to stick-slip transition

Wear ◽  
1998 ◽  
Vol 214 (2) ◽  
pp. 156-164 ◽  
Author(s):  
S. Bouissou ◽  
J.P. Petit ◽  
M. Barquins
Keyword(s):  
Normal Load ◽  
Slip Rate ◽  
Stick Slip ◽  
Slip Transition ◽  
Stable Sliding
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