Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 92 for “"Bending Stiffness"”.
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Shoe Bending Stiffness and Muscle-Tendon Unit Function in Running
… carbon fibre plate to increase the longitudinal bending stiffness of a shoe. Several mechanisms were proposed to be associated with performance improvements when running in footwear with carbon fibre plates. One of these mechanisms, the principle of optimising muscle function is currently not …
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The effects of bending stiffness on the dynamics of catenary cables
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Supersonic flutter of sandwich panels: effects of face sheet bending stiffness, rotary inertia, and orthotropic core shear stiffnesses
… that account for rotary inertia, face sheet bending deformations, and transverse shear deformations of an orthotropic core such as honeycomb. Damping forces are neglected. The linear system of partial differential equations governing the lateral deflection and the two transverse shear angles …
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Mechanical Response Tissue Analysis: Inter- and Intra-trial Reliability in Assessing Bending Stiffness of the Human Tibia in College Aged Women
… is an emerging technology for assessing maximal bending stiffness (EI) of human long bones in vivo. The MRTA variable, EI, is the product of Young's modulus of elasticity (E) and cross-sectional moment of inertia (I). EI quantifies material and architectural/geometric properties of bone. …
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Reliability and Validity of Mechanical Response Tissue Analysis in Composite and Human Tibiae
… to determine intra- and inter-day reliability of bending stiffness. The bones were then subjected to three-point bending tests to directly determine elastic modulus. Within- and between-day reliability of tibial bending stiffness with MRTA was moderate (CV = 24%) and poor (CV = 74%), respectively. …
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Exploring the material properties of small scale folded structures
… properties of these structures. Three point bending tests were performed on beams made of the materials and cross-sectional geometries of current designs to determine the bending stiffness of the printable beams currently found in printable robots, particularly the printable quad-rotor frame. …
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Structural mechanics of a plate with multiple dimples
… flat plates, corrugated sheets have an increased bending stiffness in one direction, whilst dimpled sheets have an increase in bending stiffness in both orthogonal directions. Comparing dimpled to corrugated sheets, a “second moment of area” approach might be used; however, this thesis will show …
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Reliability of Tibial Measurement with Mechanical Response Tissue Analysis
… means of estimating the cross-sectional bending stiffness (EI) of long bones, and thus can serve as a predictor of bone strength. Estimates of bone bending stiffness are derived from the point impedance response of a long bone to low frequency (70-500Hz) stimulation according to beam …
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Analytical Evaluations of Buckling Behavior of Wood Composite I-Joist with Sinusoidal Web
… for wood composite I-joist because the in-plane bending stiffness is typically greater than torsional lateral bending stiffness. Web local buckling is another important limit state because of the thin-walled web configuration. To increase the buckling capacities of wood composite I-joist, a new …
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Understanding the effects of wearing a quantitatively prescribed passive-dynamic ankle-foot orthosis on the mechanical cost-of-transport and gait velocity in individuals post-stroke
… stance due to plantar flexor weakness. PD-AFO bending stiffness is a key orthotic characteristic that can assist the plantar flexor muscles by providing the resistance needed to control shank forward rotation. Controlling shank forward rotation can store and return mechanical energy that can …
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Optimal structural design for maximum buckling load
… is given. Also, a special property in a laminate bending stiffness is found. That is, for a given stacking sequence of ply orientations, we showed an existence of a design with the same bending stiffness matrix and same total thickness even when the stacking sequence is changed.
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Overall results in second-order elasticity
… included in certain overall quantities such as bending stiffness without explicit determination of the second-order solution. The approach uses Betti's reciprocal theorem. The method is applied to obtain the resultant force and moment to second order for cylindrical bars with arbitrary …
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Bending Performance of Spliced, Nail-Laminated Posts With Edge Reinforcement
… splice the board back together. The individual bending stiffness about the strong axis of each board was tested before and after making the splice joint. The average gain in bending stiffness for each board that was cut in two and spliced back together was 20.5%. The spliced boards were then …
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Effect of isokinetic resistance training on ulnar stiffness in young, college-aged women
… is a method of non-invasively measuring the bending stiffness (EI) of bone which is determined by the product of Young's modulus of elasticity (E) and the areal cross sectional moment of inertia (I). The aim of the current study was to determine if high intensity strength training will …
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A deflection theory for anisotropic plates in which coupling between lateral deflection and in-plane displacement is present and the effect of coupling on the buckling load
… of coupling on the buckling of plates of equal bending stiffnesses in their two orthogonal directions becomes negligible as the aspect ratio of the plate becomes large. Some lateral deflection prior to buckling will occur, however, even for large aspect ratios. The general anisotropic plate is …
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A simulation and empirical study of cross-laminated timber from waney SA Pine timber
… second objective was to determine whether the bending stiffness and strength of CLT panels were influenced if components with increased wane allowance and random widths were utilised. The investigation used a sawing study as well as computer simulations to evaluate the effect of increased wane …
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Acoustic scattering in waveguides with smoothly-varying or discontinuous elastic boundaries
… and an elastic-walled waveguide with varying bending stiffness. Limiting versions of the two problems are solved using the Wiener-Hopf technique. This provides a check on the varying-parameter solutions as well as being of interest in itself.
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Vibration acceptability in wood floor systems
… the plywood contribution to increasing the bending stiffness, number of joists effective in resisting applied load, and calculation of fundamental frequency. The second section summarizes research conducted on in-situ floors. Procedures were developed to numerically integrate acceleration …
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Using 3D Printing to Improve the Impact Resistance of Sandwich Panels
… It was then tested in quasi-static compression, bending and indentation, low-velocity impact and high-velocity impact regimes and then compared against two typical reference designs. The 3D printed ULTEM-1010 panel design showed a significant improvement in core compressive strength and …
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Vibrational and mechanical properties of disordered solids
… density of states (VDOS) and length and bending stiffness of the chains. We found that the effect of chain length on the shear modulus and the vibrational density of states diminishes as it depends on the number of backbone bonds in the system. This number increases fast for short chains …
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