Kinetic and Continuum Modeling of High-Temperature Oxygen and Nitrogen Binary Mixtures

Offshore pipelines in ice environments are increasingly required to operate at higher pressure and temperature conditions. These offshore pipelines can be subjected to stress and strains resulting from loading condition and ice scour created in the area. This paper describes a study performed to investigate the mechanical behavior of High Pressure/High Temperature (HP/HT) pipelines to withstand ice scouring events. A parametric study was completed to define the governing parameters for HP/HT pipeline design. This study was based on 3D continuum modeling with an ALE (Arbitrary Lagrangian Eulerian) formulation that was developed and run using LS-DYNA. The model incorporated large deformation theory, non-linear pipe-soil interaction and non-linear pipe material behavior to define ice interaction induced pipe deformations.

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Performance analysis for binary mixtures based on R245fa using in high temperature heat pumps

Energy Conversion and Management X ◽

10.1016/j.ecmx.2021.100123 ◽

2021 ◽

pp. 100123

Author(s):

Chang Xu ◽

Hua yang ◽

Xiaohui Yu ◽

Hongting Ma ◽

Mo Chen ◽

...

Keyword(s):

High Temperature ◽

Performance Analysis ◽

Binary Mixtures ◽

Heat Pumps ◽

Temperature Heat

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Measurements and modeling of high-temperature, high-pressure density for binary mixtures of propane with n-decane and propane with n-eicosane

The Journal of Chemical Thermodynamics ◽

10.1016/j.jct.2014.12.015 ◽

2015 ◽

Vol 84 ◽

pp. 108-117 ◽

Cited By ~ 7

Author(s):

Babatunde A. Bamgbade ◽

Yue Wu ◽

Ward A. Burgess ◽

Deepak Tapriyal ◽

Isaac K. Gamwo ◽

...

Keyword(s):

High Pressure ◽

High Temperature ◽

Binary Mixtures ◽

High Temperature High Pressure

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On the accuracy of the interdiffusion coefficient measurements of high-temperature binary mixtures under ISS conditions

Comptes Rendus Mécanique ◽

10.1016/j.crme.2013.02.007 ◽

2013 ◽

Vol 341 (4-5) ◽

pp. 405-416 ◽

Cited By ~ 5

Author(s):

Núria Saez ◽

Xavier Ruiz ◽

Jordi Pallarés ◽

Valentina Shevtsova

Keyword(s):

High Temperature ◽

Binary Mixtures ◽

Interdiffusion Coefficient

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Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100071363 ◽

1973 ◽

Vol 31 ◽

pp. 184-185

Author(s):

M.S. Grewal ◽

S.A. Sastri ◽

N.J. Grant

Keyword(s):

High Temperature ◽

Nickel Alloys ◽

Thermomechanical Processing ◽

Cold Work ◽

High Temperature Strength ◽

Strengthening Effect ◽

Mechanical Processing ◽

Uniform Dispersion ◽

Oxide Particles ◽

Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

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Application of TEM to Deformation, Wear, and Fracture of Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052377 ◽

1974 ◽

Vol 32 ◽

pp. 472-473

Author(s):

B. J. Hockey

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Mechanical Behavior ◽

Brittle Materials ◽

High Temperature Strength ◽

Wide Range ◽

Corrosive Environments ◽

Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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Lattice Imaging of Grain Boundaries in Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100078171 ◽

1977 ◽

Vol 35 ◽

pp. 114-115

Author(s):

D. R. Clarke ◽

G. Thomas

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Silicon Nitride ◽

Grain Boundaries ◽

High Temperature Strength ◽

Current Interest ◽

Lattice Imaging ◽

Special Significance ◽

Structural Applications ◽

Refractory Ceramics

Grain boundaries have long held a special significance to ceramicists. In part, this has been because it has been impossible until now to actually observe the boundaries themselves. Just as important, however, is the fact that the grain boundaries and their environs have a determing influence on both the mechanisms by which powder compaction occurs during fabrication, and on the overall mechanical properties of the material. One area where the grain boundary plays a particularly important role is in the high temperature strength of hot-pressed ceramics. This is a subject of current interest as extensive efforts are being made to develop ceramics, such as silicon nitride alloys, for high temperature structural applications. In this presentation we describe how the techniques of lattice fringe imaging have made it possible to study the grain boundaries in a number of refractory ceramics, and illustrate some of the findings.

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