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  • Elasticity
  • Rheology
  • Springer  (17)
  • Air Force Geophysics Laboratory  (3)
  • Blackwell Publishing Ltd
  • International Union of Crystallography
  • Springer Nature
  • 1985-1989  (16)
  • 1975-1979  (4)
  • 1960-1964
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Rheological and thermal properties of polysaccharide gels extracted fromAhnfeltia plicata (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 877-882 
    Details
    ISSN: 1435-1536
    Keywords: Rheology ; DSC ; gel ; polysaccharide ; Ahnfeltia plicata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The dynamic modulus began to decrease rapidly and loss tanδ showed maxima at the temperature range from 40 °C to 65 °C in polysaccharide gels extracted fromAhnfeltia plicata. An exothermic peak appeared at about 30 °C in heating DSC thermograms for these gels. Endothermic DSC peaks accompanying gel-sol transition appeared at the temperature range from 60 °C to 80 °C. The effects of alkali pretreatment and of maturation on the rheological and thermal properties of these gels were examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410638
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  • 2
    Electronic Resource
    Electronic Resource
    Deformable models (1988)
    Springer
    The visual computer 4 (1988), S. 306-331 
    Details
    ISSN: 1432-2315
    Keywords: Modeling ; Animation ; Deformation ; Elasticity ; Dynamics ; Simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract We develop physically-based models of deformable curves, surfaces, and solids for use in computer graphics. Our deformable models are governed by the mechanical laws of continuous bodies whose shapes can change over time. These laws, expressed in the form of dynamic differential equations, unify the description of shape and motion. By solving the equations numerically we are able to create realistic animations involving the interaction of deformable models with various applied forces, ambient media, and impenetrable obstacles in a simulated physical world. We develop deformable models capable of perfectly elastic behavior and more general inelastic behavior, including viscoelasticity, plasticity, and fracture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01908877
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  • 3
    Electronic Resource
    Electronic Resource
    The rheological properties of concentrated cetyltrimethylammonium bromide-salicylic acid solutions in water (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 269-280 
    Details
    ISSN: 1435-1536
    Keywords: Rheology ; aqueoussolution ; cetyltrimethylammonium bromide-salicylic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Data on the rheological properties of the hexadecyl-trimethylammonium salicylate system (CTAB-SA) in water are reported. Three concentrations were used (0.1, 0.01, and 0.001 M). For the highest concentration, the effect of temperature on the rheology was studied in detail. The rheology of the 0.1 M CTAB-SA solution indicates a very uniform micellar size. By contrast with concentrated polymethyl methycrylate dispersions studied by the author, there was a strong divergence between the viscosity-shear rate and viscosity-frequency data, although the plateau low shear rate and frequency values agreed over a wide range of temperature. This effect could be explained by a shear rate dependent diffusion constant. The large temperature variation of the plateau viscosity and elasticity modulus values could be explained by a combination of micellar number concentration and flexibility changes as the temperature varies. At lower concentrations, the rheological data shows evidence of polydispersity in micellar size. Strong shear thickening and extensional viscosity effects are also evident, probably due to micellar overlap and cluster formation in strong shear fields and the alignment of the very long micelles in elongational flow. The shear thickening effects take some 200 s to relax (0.01 M solution). Recovery of the elasticity after shearing the 0.1 M solution is rapid (a few hundred milliseconds).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410585
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  • 4
    Electronic Resource
    Electronic Resource
    A generalization of the Rouse-Zimm model (1987)
    Springer
    Colloid & polymer science 265 (1987), S. 101-105 
    Details
    ISSN: 1435-1536
    Keywords: Rheology ; hydrodynamicinteraction ; Rouse-Zimm model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The idea of consistently averaging the hydrodynamic interaction and its various consequences for Hookean dumbbells are reviewed. For long chains this idea can be used to generalize the Rouse-Zimm model for polymer solutions. Unlike the usual Rouse-Zimm model, the new model for steady shear flow predicts a nonzero second normal stress coefficient and shear rate dependent material functions. In the limit of long chains, the viscosity and the normal stress coefficients are universal functions of the reduced shear rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412752
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  • 5
    Electronic Resource
    Electronic Resource
    The complex rheological behavior of an aqueous cationic surfactant solution investigated in a Couette-type viscometer (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 627-636 
    Details
    ISSN: 1435-1536
    Keywords: Rheology ; surfactantsolutions ; viscosityjump ; timeeffects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this paper the behavior of an aqueous surfactant solution in a rotational Couette viscometer is investigated. It is shown that this behavior depends strongly upon time, upon the way in which the flow curve is obtained (with increasing or decreasing shear rate), upon the temperature, and upon the concentration of the solution. Furthermore, the results also reveal a pronounced dependence upon the size of the actual measuring system used. It is shown that the slip-velocity concept is not applicable to explain this dependence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410440
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  • 6
    Electronic Resource
    Electronic Resource
    Viscoelastic properties of polyacrylonitrile particles stabilised by a poly-2-vinylpyridine/polytert butylstyrene block copolymer (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 736-740 
    Details
    ISSN: 1435-1536
    Keywords: Rheology ; viscoelasticity ; dispersions ; storagemodulus ; blockcopolymer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The viscoelastic properties of a dispersion of polyacrylonitrile particles stabilised by a block copolymer poly-2-vinylpyridine/polytert butylstyrene dispersed in solvesso have been measured as a function of particle concentration and frequency at ambient temperatures. At low volume fraction of particles it was found that the loss modulus of the dispersions was larger than the storage modulus, whilst at volume fractions 〉 0.40 the storage modulus dominates the rheology. This is attributable to there being a steric repulsion between the particles as a result of an increasing concentration of particles and the resultant reduction in interparticle separation in the dispersion. In addition the observed exponential increase of the storage modulus with increasing particle volume fraction mirrors the exponential increase in force with decreasing surface separation of the same type of polymers adsorbed to mica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01524377
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of sample dimensions, lubrication and deformation rate on uniaxial compression of gelatin gels (1985)
    Springer
    Rheologica acta 24 (1985), S. 265-271 
    Details
    ISSN: 1435-1528
    Keywords: Elasticity ; gel ; compression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The response of 10% gelatin gels to uniaxial compression is determined in part by frictional effects at the gel-platen interface. By using teflon-coated plates, lubricated with paraffin or silicone oil, these frictional effects are effectively eliminated. The stress-strain response can then be described by the two-constant Mooney-Rivlin relation, the sum of the two parameters (C 1 +C 2 ) being about 25% lower in lubricated compression than the value obtained in simple shear and torsion. Cross-head speed (for total testing times of 0.2–3 min) had no effect on material response, but long-term stress relaxation does occur over periods of about 30 min and longer. Sample radius did not affect the response in lubricated compression but had a major effect under unlubricated conditions. No systematic change in response was seen with sample diameter to height (aspect) ratios between 9.6 and 3.1 in lubricated compression, but data scatter for a given sample diameter was worst at the lowest heights (highest aspect ratio). Agreement of all true stress versus strain data was within about ± 7% regardless of sample height or deformation rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332607
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  • 8
    Electronic Resource
    Electronic Resource
    The small anisotropy formulation of elastic deformation (1989)
    Springer
    Acta applicandae mathematicae 14 (1989), S. 259-268 
    Details
    ISSN: 1572-9036
    Keywords: 73C20 ; 73C25 ; 73C50 ; 73G05 ; 73G10 ; Elasticity ; constitutive relations ; specific internal energy ; shear modulus ; hyperelasticity ; isotropic ; anisotropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The specific internal energy defines the constitutive relation (stress-strain function) in elastic deformations. We introduce a form for the specific internal energy that expresses the idea of small anisotropy. In this formulation, only one parameter is needed to specify the anisotropic part of the deformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307216
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  • 9
    Electronic Resource
    Electronic Resource
    Precision calculation of elasticity for percolation (1986)
    Springer
    Journal of statistical physics 44 (1986), S. 211-223 
    Details
    ISSN: 1572-9613
    Keywords: Elasticity ; percolation ; conductivity ; critical exponents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Monte Carlo transfer matrix evaluation of the elastic constants at the percolation threshold of the random-bond honeycomb lattice, with widths of up to 96 and lengths of about two million lattice constants (roughly 200 hours CDC Cyber 205 vector computer time) gave a critical exponentT=3.96±0.04 with a logarithmic correction term. This exponent agrees well with the scaling hypothesisT=t+2v=3.97, relatingT to the two-dimensional conductivity exponent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01010913
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  • 10
    Electronic Resource
    Electronic Resource
    Blood viscosity in phocid seals: possible adaptations to diving (1989)
    Springer
    Journal of comparative physiology 159 (1989), S. 153-158 
    Details
    ISSN: 1432-136X
    Keywords: Seals ; Pigs ; Blood viscosity ; Diving ; Rheology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Mean corpuscular volume (MCV) and mean corpuscular hemoglobin concentration (MCHC) of phocid seal red blood cells (RBC) are elevated compared to those of most terrestrial mammalian species. The influence of these characteristics on blood flow was revealed by viscosity (VIS) measurements. 2. RBC morphology and VIS of whole blood from 7 harbor seals and 5 northern elephant seals were compared with blood of the domestic pig. Samples were analysed for RBC count, white blood cell (WBC) count, total plasma proteins, hematocrit (HCT), MCV and MCHC. Viscosity measurements were made at shear rates from 11.5 to 230.4 s−1 on a Wells-Brookfield cone-plate viscometer at 37°C. 3. Mean values for HCT (%), MCV (μm3) and MCHC (%) were, respectively: elephant seal: 57, 176, 44; harbour seal: 53, 105, 38; domestic pig: 28, 54, 34. Pig blood was reconstituted to match seal blood HCTs. VIS determinations showed that seal and pig blood conform to the general mammalian dependence of VIS upon shear rate and HCT. 4. Seal blood VIS was 28% (harbour seal) and 16% (elephant seal) less than pig blood VIS at low shear (P〈0.05). Seal blood carried more hemoglobin per unit volume than did pig blood reconstituted to the same HCT. Fewer, larger RBC with higher MCHC, and hence elevated oxygen storage, accompanied by reduced VIS and reduced flow resistance near stasis suggests that this feature of phocid seal blood is an adaptation to circulatory redistribution during long dives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00691735
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