Results 271 to 280 of about 408,399 (309)
Some of the next articles are maybe not open access.
Dynamic stiffness and crossbridge action in muscle
Biophysics of Structure and Mechanism, 1978Small sinusoidal vibrations at 300 HZ were applied to frog sartorius muscle to measure the dynamic stiffness (Young's modulus) throughout the course of tetanus. For a peak-to-peak amplitude of 0.4% the dynamic Young's modulus increased from 1.5 X 10(5) Nm-2 in the resting state to 2 X 10(7) Nm-2 in tetanus.
openaire +2 more sources
Dynamic Stiffness of Rice Grain
Transactions of the ASAE, 1978ABSTRACT EXPERIMENTS to determine dynamic mechanical properties of brown rice, variety IR-8, were car-ried out with cylindrically shaped specimens tested uniaxially along the cylindrical axis. Storage and loss moduli were determined from 100 to 1000 Hz forcing frequency at four different moisture levels from 12 to 29 percent (dry basis).
null P. K. Chattopadhyay +2 more
openaire +1 more source
Dynamic Stiffness of Circular Foundations
Journal of the Engineering Mechanics Division, 1975A series of parametric studies have been presented investigating the effects of internal soil damping, Poisson's ratio, layer depth, and embedment on the stiffness functions of circular footings subjected to dynamic forces. The effect of having a finite layer of soil on rigid rock is to introduce valleys in the stiffnesses at the resonant frequencies ...
Eduardo Kausel, José M. Roësset
openaire +1 more source
Dynamic stiffness for lateral buckling
Computers & Structures, 1992Abstract The dynamic stiffness method can predict an infinite number of natural modes of a structural system by means of a finite number of coordinates. It has been successful for dynamic structural analysis under the influence of constant axial force.
openaire +1 more source
Dynamic stiffness and response analysis
Dynamics and Stability of Systems, 1987The dynamic stiffness method enables one to model an infinite number of natural modes by means of a finite number of degrees of freedom. The method has been extended to frame structures with uniform or non-uniform, straight or curved, damped or undamped beam members.
openaire +1 more source
Dynamic stiffness of rectangular plates
1986In what follows the dynamic stiffness Z33 of a rectangular plate will be computed and to this end the problem $${\Delta ^2}{\rm{W}} - {\beta ^4}{\rm{W = }}{1 \over {\rm{D}}}{\rm{\hat f}}\delta \left( {{\rm{x}} - {{\rm{x}}_{\rm{P}}}{\rm{,}}\,{\rm{y}} - {{\rm{y}}_{\rm{P}}}} \right)$$ has to be solved in the domain −a ≤ × ≤ a, −b ≤ y ≤ b with the ...
Peter Hagedorn +2 more
openaire +1 more source
Dynamics of stiff polymer chains
The Journal of Chemical Physics, 1988The dynamics of worm-like polymer chains is considered for models with constrained bond lengths and elastic or constrained bond angles. Previous work attempted either the representation of the constraints on a complete basis set, which is impractical for chains of more than a few bonds, or the analytical preaveraging of inverse constraint matrices ...
openaire +1 more source
Dynamic Stiffness of Cracked Interfaces
Journal of Applied Mechanics, 1990Quantitative relationships are derived between the dynamic macromechanical stiffness and microparameters of planar interfaces containing distributed cracks. The derivation is based on the solution of the problem of elastic wave reflection by a plane with a continuous distribution of springs to model the cracked interface at the macrolevel.
openaire +1 more source