Erratum: Nonisothermal condition in past melt extension experiments

2015 ◽  
Vol 59 (5) ◽  
pp. 1329-1334 ◽  
Author(s):  
Panpan Lin ◽  
Shi-Qing Wang
Keyword(s):  
Nonisothermal Condition

Nonlinear Analysis of Shape Memory Devices With Duffing and Quadratic Oscillators

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Shantanu Rajendra Gaikwad ◽  
Ashok Kumar Pandey
Keyword(s):  
Shape Memory ◽  
Harmonic Balance ◽  
Nonlinear Response ◽  
Isothermal Condition ◽  
Nonisothermal Condition ◽  
Nonlinear Frequency ◽  
Method Of Harmonic Balance ◽  
Nonlinear Frequency Response ◽  
Balance Analysis ◽  
Analysis Of Results

In this paper, we investigate the linear and nonlinear response of shape memory alloy (SMA)-based Duffing and quadratic oscillator under large deflection conditions. In this study, we first present thermomechanical constitutive modeling of SMA with a single degree-of-freedom system. Subsequently, we solve equation to obtain linear frequency and nonlinear frequency response using the method of harmonic balance and validate it with numerical solution as well as averaging method under the isothermal condition. However, for nonisothermal condition, we analyze the influence of cubic and quadratic nonlinearity on nonlinear response based on method of harmonic balance. Analysis of results leads to various ways of controlling the nature and extent of nonlinear response of SMA-based oscillators. Such findings can be effectively used to control external vibration of different systems.

scholarly journals Carbothermic Reduction of Cr2O3 and Fe2O3 under Nonisothermal Condition

2004 ◽  
Vol 90 (12) ◽  
pp. 992-998 ◽  
Author(s):  
Keiji OKUMURA ◽  
Tomoko SUGIMURA ◽  
Mamoru KUWABARA ◽  
Masamichi SANO
Keyword(s):  
Carbothermic Reduction ◽  
Nonisothermal Condition

Heat Transfer to a Nonisothermal Rotating Disk With a Turbulent Boundary Layer

1965 ◽  
Vol 87 (3) ◽  
pp. 362-368 ◽  
Author(s):  
J. P. Hartnett ◽  
Shing-Hwa Tsai ◽  
H. N. Jantscher
Keyword(s):  
Heat Transfer ◽  
Additional Data ◽  
Rotating Disk ◽  
Eddy Diffusivity ◽  
Nonisothermal Condition ◽  
High Speeds ◽  
Infinite Extent ◽  
Tangential Momentum ◽  
Induced Flow ◽  
Nonisothermal Conditions

Three approaches are presented for the prediction of heat transfer from a nonisothermal disk rotating in a fluid of infinite extent at such high speeds that the induced flow is turbulent. These include the analysis of Dorfman, the analysis of Davies (extended to nonisothermal conditions) assuming the eddy diffusivity of radial momentum is equal to the eddy diffusivity of heat, and a modified Davies analysis assuming the eddy diffusivity of tangential momentum is equal to the eddy diffusivity of heat. A comparison of these three predictions with available heat and mass transfer data suggests that Dorfman’s analysis when appropriately modified gives the best representation for the isothermal rotating disk. For the nonisothermal disk having a power-function wall-temperature distribution, Tw − Te = Brm, both the Dorfman analysis and the tangential momentum analogy give what appears to be a reasonable estimate of the influence of the nonisothermal condition, while the radial momentum analogy overestimates the influence. Until additional data are obtained, it is recommended that the modified Dorfman prediction be used to estimate heat transfer from a nonisothermal disk in the presence of turbulent flow.

Solving the Waxy Crude-Oil Pipeline-Flow-Restart Problem Numerically in Nonisothermal Condition from the Perspective of Engineering

2019 ◽  
Vol 34 (03) ◽  
pp. 647-666
Author(s):  
Lei Chen ◽  
Junjie Gao ◽  
Gang Liu ◽  
Shuyi Ren ◽  
Cheng Chen ◽  
...  
Keyword(s):  
Crude Oil ◽  
Nonisothermal Condition ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Oil Pipeline ◽  
Pipeline Flow

A novel DOPO-containing flame retardant for epoxy resin

2016 ◽  
Vol 29 (8) ◽  
pp. 899-912 ◽  
Author(s):  
Liqiang Gu ◽  
Jianhui Qiu ◽  
Eiichi Sakai
Keyword(s):  
Flame Retardant ◽  
Nonisothermal Condition ◽  
Scanning Calorimetry ◽  
One Pot ◽  
Limiting Oxygen Index ◽  
Degradation Activation Energy ◽  
Index Value ◽  
Halogen Free ◽  
Modified Epoxy ◽  
Curing Procedure

A novel halogen-free flame retardant (6,6′-(((methylenebis(4,1-phenylene))bis(azanediyl))bis((4-hydroxy-3-methoxyphenyl)methylene))bis(6H-dibenzo[c,e][1,2]oxaphosphinine 6-oxide)(DP-DDM))) was synthesized via a one-pot procedure based on the Pudovik reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide and imine directly resulting from 3-methoxy-4-hydroxybenzaldehyde with 4,4′-methylenedianiline (DDM). The thermal curing behaviors of epoxy resins with different contents of DP-DDM were investigated by differential scanning calorimetry under a nonisothermal condition, aimed to suggest an optimized curing procedure in accordance with the property of DP-DDM. These DP-DDM-modified epoxy thermosets under optimized curing procedure showed high glass transition temperature and thermal degradation activation energy. Moreover, their high flame-retarding performance has been found: the epoxy thermosets with a relatively low addition amount of DP-DDM (on account of the phosphorus content of 0.75 wt%) can reach UL 94 V-0 (Instrumental analysis and measurements) rating with limiting oxygen index value of 34.5.

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