Results 261 to 270 of about 116,588 (305)
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Dynamic Mechanical Properties of Mechanically Deformed Filaments
Textile Research Journal, 1985The effect of mechanical deformation on filament structure has been evaluated using a viscoelastometer. As a result of cyclic twisting, or torsional deformation, the fiber structure tends to disorient and behave more like an amorphous system where the loss factor (tan δ) increases as deformation cycles increase.
R.S. Chauhan, N.E. Dweltz
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Dynamic Mechanical Properties of Porcine Lacrimal Canaliculus
Current Eye Research, 2007To better understand the mechanisms of tear drainage, the mechanical properties of porcine canaliculus were measured in compression mode while submerged in isotonic fluid by using a dynamic mechanical analyzer. The storage modulus (E') for the porcine canaliculus is about 3 kPa at 1 Hz and increases to about 5 kPa at 25 Hz.
Heng, Zhu, Subir, Bhatia, Anuj, Chauhan
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Hydration Control of the Mechanical and Dynamical Properties of Cellulose
Biomacromolecules, 2014The mechanical and dynamical properties of cellulose, the most abundant biomolecule on earth, are essential for its function in plant cell walls and advanced biomaterials. Cellulose is almost always found in a hydrated state, and it is therefore important to understand how hydration influences its dynamics and mechanics. Here, the nanosecond-time scale
Loukas, Petridis +8 more
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Dynamic and mechanical properties of supported lipid bilayers
The Journal of Chemical Physics, 2016Supported lipid bilayers (SLBs) offer an excellent model system for investigating the physico-chemical properties of the cell membrane. In this work, dynamic and mechanical properties of SLBs are explored by dissipative particle dynamics simulations for lipids with different architectures (chain length, kink, and asymmetry associated with lipid tails).
Hsing-Lun Wu +2 more
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The dynamic mechanical properties of human skin in vivo
Journal of Biomechanics, 1983The propagation and attenuation of shear waves in human skin is investigated over a frequency range of near zero to 1000 Hz. The results show that at frequencies below a few hundred Hz, shear waves propagate along the skin surface and thus provide information on the dynamic mechanical properties of the stratum corneum.
R O, Potts, D A, Chrisman, E M, Buras
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Acoustic and dynamic mechanical properties of a polyurethane rubber
The Journal of the Acoustical Society of America, 2002Acoustical and dynamic mechanical measurements were carried out on a commercial polyurethane rubber, DeSoto PR1547. The sound speed and attenuation were measured over the range from 12.5 to 75 kHz and 3.9 to 33.6 °C. Shear modulus was measured from 10−4 to 2 Hz and −36 to 34 °C.
Peter H, Mott +2 more
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The dynamic mechanical properties of nylons
Journal of Applied Polymer Science, 1959AbstractA study of the dynamic mechanical properties of a series of polyamide polymers and some related polymers has been made over a wide temperature range at about 100 cycles/sec. by means of a vibrating reed method. The character of the β dispersion of the polyamides occurring at about −40°C. is discussed in relation to the chemical structure of the
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Dynamic Mechanical and Tensile Properties
2012DYNAMIC MECHANICAL AND TENSILE PROPERTIES are determined in all branches of materials science. There is a large body of published structure/property information that can be integrated with coatings research and development. By using structure/property information, coatings chemists can design and optimize chemical structures of the binder components of
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Measurement of Dynamic Mechanical Properties
1980Measurements of dynamic mechanical properties of viscoelastic materials have been reviewed. The technology for investigating the dynamic mechanical properties of materials has advanced greatly due to new electronic circuits, improved transducers, signal receiving systems, and computerized controlling systems.
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Dynamic properties of Lednev's parametric resonance mechanism
Bioelectromagnetics, 1996This paper presents a further development of the mechanism for the detection of weak magnetic fields proposed by [Lednev (1991): Bioelectromagnetics 12:71-75]. The fraction of excited oscillator states of an unhydrated ion is studied in a dynamic model driven by the predicted (time-varying) transition probability in the presence of thermal noise and an
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