Results 311 to 320 of about 3,311,038 (365)
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Gradient‐dependent plasticity: Formulation and algorithmic aspects
International Journal for Numerical Methods in Engineering, 1992AbstractA plasticity theory is proposed in which the yield strength not only depends on an equivalent plastic strain measure (hardening parameter), but also on the Laplacian thereof. The consistency condition now results in a differential equation instead of an algebraic equation as in conventional plasticity.
De Borst, René, Mühlhaus, Hans-Bernd
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On gradient dependent diffusivity
Chemical Engineering Science, 1973Abstract It is a known fact that surface diffusion is dependent on temperature and concentration. Data on adsorption of water in microporous silica gel indicate that an additional quantity is influencing diffusivity in such a system. These observations can be explained by a surface diffusivity depending on concentration gradient.
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Gradient-Dependent Damage Constitutive: The Second-Order Gradient Damage Model
Characterization, Modeling, and Performance of Geomaterials, 2009When the strain tensor, the scalar damage quantity and the Laplacian thereof serve as the state variables of Helmholtz free energy, the general expressions of elasticity-gradient damage constitutive equations are derived directly from the basic law of irreversible thermodynamics by constitutive functional expansion method at the initial state.
Bing Zhao +4 more
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On the Reynolds number dependence of velocity-gradient structure and dynamics
Journal of Fluid Mechanics, 2018We seek to examine the changes in velocity-gradient structure (local streamline topology) and related dynamics as a function of Reynolds number ( $Re_{\unicode[STIX]{x1D706}}$ ). The analysis factorizes the velocity gradient ( $\unicode[STIX]{x1D608}_{ij}
Rishita Das, S. Girimaji
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Eukaryotic Chemotaxis under Periodic Stimulation Shows Temporal Gradient Dependence
Physical Review Letters, 2023When cells of the social amoebaDictyostelium discoideumare starved of nutrients they start to synthesize and secrete the chemical messenger and chemoattractant cyclic Adenosine Mono Phosphate (cAMP). This signal is relayed by other cells, resulting in the establishment of periodic waves.
Richa Karmakar +3 more
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Conjugate Gradient Methods less Dependent on Conjugacy
SIAM Review, 1986This paper reviews some recent conjugate gradient (CG) methods and outlines some promising directions for further developments. Two charts summarize the methods and indicate the main line of development, one for the methods utilizing a variable metric and limited memory and the other for methods based upon successive affine reduction.
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Thermal‐gradient‐induced non‐mass‐dependent isotope fractionation
Rapid Communications in Mass Spectrometry, 2011Abstract Isotope fractionation resulting from gas diffusion along a thermal gradient has always been considered entirely mass‐dependent. A previous report, however, showed that non‐mass‐dependent 17 O anomalies can be generated simply by subjecting O 2
Tao, Sun, Huiming, Bao
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Magnetohydrodynamic Channel Flow under Time-Dependent Pressure Gradient
The Physics of Fluids, 1961Hartmann's work on magnetohydrodynamic channel flow is extended to include the case with a time-dependent pressure gradient. Cases treated are: (a) suddenly applied pressure gradients which are periodic in time, and (b) pressure gradients which, with respect to time, are step and delta functions. The channel walls are assumed to be perfectly conductive.
Yen, J. T., Chang, C. C.
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Sodium gradient dependent calcium transport in renilla lumisomes
Biochemical and Biophysical Research Communications, 1978Renilla lumisomes are membrane-bounded bioluminescent vesicles which produce light when the lumisomal membrane is made permeable to Ca2+. During studies of Ca2+ transport we found that lumisomes can be made permeable to Ca2+ by establishing a Na+ gradient with the higher Na+ concentration being on the inside of the lumisomal membrane.
J M, Anderson, M J, Cormier
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Gradient Dependent Fatigue Limit Criterion
1999Experimental evidence has shown that the fatigue limit of metallic cylindrical specimens in fully reversed bending is significantly higher than the respective limit in fully reversed tension-compression. The higher values of the bending fatigue limits observed have to be attributed to the benign influence of the gradient of the bending normal stress on
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