Time-Dependent Elastic Tensor of Cellulose Nanocrystal Probed by Hydrostatic Pressure and Uniaxial Stretching

We have investigated athermal and isothermal martensitic transformations (typical displacive transformations) in Fe–Ni, Fe–Ni–Cr, and Ni-Co-Mn-In alloys under magnetic fields and hydrostatic pressures in order to understand the time-dependent nature of martensitic transformation, that is, the kinetics of martensitic transformation. We have confirmed that the two transformation processes are closely related to each other, that is, the athermal process changes to the isothermal process and the isothermal process changes to the athermal one under a hydrostatic pressure or a magnetic field. These findings can be explained by the phenomenological theory, which gives a unified explanation for the two transformation processes previously proposed by our group.

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Further theoretical analysis of concentration–pressure–flux waves in phloem transport systems

Canadian Journal of Botany ◽

10.1139/b78-118 ◽

1978 ◽

Vol 56 (8) ◽

pp. 1086-1090 ◽

Cited By ~ 7

Author(s):

Jack M. Ferrier

Keyword(s):

Hydrostatic Pressure ◽

Water Flux ◽

Sieve Tube ◽

Phloem Transport ◽

Time Dependent ◽

Transport Systems ◽

Flux Variation ◽

Complex Interactions ◽

Theoretical Results ◽

Sugar Source

Theoretical results show that waves involving complex interactions between osmotic pressure, hydrostatic pressure, and fluxes of water and solute can occur in any phloem transport system surrounded by a semipermeable membrane. These results show that such waves can travel from sugar sink to sugar source as well as from sugar source to sugar sink. The time-dependent sugar concentration variation is shown to be caused largely by the time-dependent variation of the gradient of mass flow velocity in the sieve tube which is produced by the time-dependent variation of water flux across the membrane. This water flux variation is produced by a slight phase difference between osmotic and hydrostatic pressure variation. It is proposed that this phenomenon be called the concentration–pressure–flux (CPJ) wave.

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Band Gap Shift of GaN under Uniaxial Strain Compression

MRS Proceedings ◽

10.1557/proc-693-i11.49.1 ◽

2001 ◽

Vol 693 ◽

Cited By ~ 1

Author(s):

H. Y. Peng ◽

M. D. McCluskey ◽

Y. M. Gupta ◽

M. Kneissl ◽

N. M. Johnson

Keyword(s):

Shock Wave ◽

Hydrostatic Pressure ◽

Band Gap ◽

Uniaxial Strain ◽

Biaxial Stress ◽

Time Dependent ◽

Time Resolved ◽

Piezoelectric Field ◽

Slow Band ◽

Absorption Measurements

AbstractThe band-gap shift of GaN:Mg epilayers on (0001)-oriented sapphire was studied as a function of uniaxial strain compression along the c-axis using time-resolved, optical absorption measurements in shock wave experiments. For longitudinal stresses ranging from 4 to 14 GPa, the band gap shift is approximately 0.026 eV/GPa. Combining this result with the known behavior of wurtzite GaN under hydrostatic pressure and biaxial stress, a new set of deformation potentials has been estimated: acz-D1 = -10.2 eV, act-D2 = -7.9 eV, D3 = 1.33 eV and D4 = -0.74 eV. A slow band gap shift is also observed following the immediate band gap increase upon impact. This phenomenon can be explained by a time-dependent screening of the piezoelectric field.

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Time-dependent nature of displacive transformations in Fe–Ni and Fe–Ni–Mn alloys under magnetic field and hydrostatic pressure

Materials Science and Engineering A ◽

10.1016/s0921-5093(00)01878-5 ◽

2001 ◽

Vol 312 (1-2) ◽

pp. 219-226 ◽

Cited By ~ 16

Author(s):

T. Kakeshita ◽

J. Katsuyama ◽

T. Fukuda ◽

T. Saburi

Keyword(s):

Magnetic Field ◽

Hydrostatic Pressure ◽

Time Dependent

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A Nonequilibrium Molecular Dynamics Simulation of the Time-Dependent Orientational Coupling between Long and Short Chains in a Bimodal Polymer Melt upon Uniaxial Stretching

Macromolecules ◽

10.1021/ma971826x ◽

1999 ◽

Vol 32 (19) ◽

pp. 6348-6358 ◽

Cited By ~ 8

Author(s):

Sandra Barsky ◽

Gary W. Slater

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Polymer Melt ◽

Time Dependent ◽

Dynamics Simulation ◽

Nonequilibrium Molecular Dynamics ◽

Uniaxial Stretching ◽

Nonequilibrium Molecular Dynamics Simulation

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Filler and Water Reducer Effects on Sedimentation, Bleeding and Zeta-Potential of Cement Paste

Nordic Concrete Research ◽

10.2478/ncr-2018-0007 ◽

2018 ◽

Vol 58 (1) ◽

pp. 107-125 ◽

Cited By ~ 2

Author(s):

Ya Peng ◽

Bård Pedersen ◽

Serina Ng ◽

Klaartje de Weerdt ◽

Stefan Jacobsen

Keyword(s):

Hydrostatic Pressure ◽

Zeta Potential ◽

Cement Paste ◽

Time Dependent ◽

Sedimentation Rates ◽

Combined Effects ◽

Zeta Potentials ◽

The Stability ◽

Pressure Changes ◽

Improve Stability

Abstract Bleeding and sedimentation quantify the stability of fresh cement paste, whereas the addition of fillers and water reducers affect the stability. The effect of various types of fillers and water reducers was investigated by measuring bleeding, hydrostatic pressure and electroacoustic zeta-potential. Depending on their characteristics and use, fillers can improve stability by reducing sedimentation rate and bleeding. The combined effects of fillers and water reducers on the sedimentation rates, quantified as time-dependent hydrostatic pressure changes (dp/dt) in fresh matrix, correspond to their effects on zeta-potentials. The influence of the water reducers on sedimentation and bleeding exceed that of filler type.

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Effects of Hydrostatic Nonlinearity on Motions of Floating Structures

29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 4 ◽

10.1115/omae2010-20439 ◽

2010 ◽

Cited By ~ 1

Author(s):

Yusong Cao ◽

Galin Tahchiev ◽

Fuwei Zhang ◽

Jan V. Aarsnes ◽

Einar B. Glomnes

Keyword(s):

Hydrostatic Pressure ◽

Numerical Integration ◽

Equation Of Motion ◽

Time Dependent ◽

Restoring Force ◽

Floating Structures ◽

Hydrostatic Load ◽

Direct Numerical Integration

This paper presents a method to account for nonlinear hydrostatic restoring force/moments on vessels of arbitrary hull shape. The method calculates the time-dependent hydrostatic load on a vessel based on the direct numerical integration of the hydrostatic pressure over the instantaneous “wetted” portion of the vessel’s hull surface. The 6-DOF equation of motion with the nonlinear hydrostatic load (replacing the linear hydrostatic load) is solved. The effects of the hydrostatic nonlinearity are investigated for a few practical hull shapes (including a cylindrical SPAR, a conical BUOY, and a VLCC-converted FPSO). The nonlinear hydrostatic loads are compared with the corresponding linear ones and the importance of the hydrostatic nonlinearity and couplings on the vessel motions is assessed.

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