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 42 for “"shear stiffness"”.
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Prebuckling and postbuckling behavior of stiffened composite panels with axial-shear stiffness coupling
… to a uniform end shortening is presented. Axial-shear stiffness coupling is introduced by rotating the stiffener and/or prescribing skin laminates with membrane and bending stiffness coupling. A panel’s axial-shear coupling response is defined as the ratio of the panel’s shear load to its …
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Characterization of shear stiffness and cell metabolism in chondrocyte-sealed self-assembling peptide hydrogel scaffolds
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.
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Structural Analysis of a Pultruded Composite Beam: Shear Stiffness Determination and Strength and Fatigue Life Predictions
… Part 1 focuses on calculating the Timoshenko shear stiffness of the DWB and understanding what factors may introduce error in the experimental measurement of the quantity for this and other sections. Laminated beam theory and finite element analysis (FEA) were used to estimate the shear …
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Design Manual Development for a Hybrid, FRP Double-Web Beam and Characterization of Shear Stiffness in FRP Composite Beams
… design guide for the DWB, which includes stiffness and strength data. The design manual also includes design allowables determined through a statistical analysis of test data. Static testing of the beams, including failure tests, has been conducted in order to determine such beam …
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Flutter of sandwich panels at supersonic speeds
… thin plate theory. In such a theory, transverse shear deformations are neglected which is a reasonable assumption for solid plates. For a sandwich panel, neglect of transverse shear deformations may not be a good assumption in flutter analysis inasmuch as studies have indicated that the vibration …
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Chondrocyte metabolism and matrix nano-electromechanics : the response to cartilage tissue shear deformation
… forces gives cartilage unique compressive and shear stiffness that varies with the rate of deformation. Chondrocytes synthesize and degrade matrix components influenced by the regulatory signals present in the extracellular matrix. The transduction mechanisms by which mechanical signals are …
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Design tools and predictions for nonlinear elastic solids in soft machine design
… such as intrinsic nonlinearities, variable stiffness, and strain to break. Keeping these properties in mind, we explore new design-based organizations of knowledge, including design motivated constitutive modeling and Ashby-style material selection charts. As a result, we develop new …
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Behavior of Gasketed Segmental Concrete Tunnel Lining
… results show that as the circumferential joint shear stiffness and normal load (shoving force) increase, the lining behavior becomes closer to that of the no-joint lining.
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Análise dinâmica das vigas sandwich comprimidas
… load is plotted for several values of the shear stiffness of the sandwich beams. Numerical tables give the results for each case of boundary conditions.
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Evaluation of the MD shear test method as a criterion for predicting box compressive strength
… rigidities of the panel and its transverse shear rigidities. McKinlay proposed a new method to measure the MD transverse shear stiffness of corrugated board. This research was aimed at designing a fixture to perform the MD shear test and to evaluate its performance. In addition, the …
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Análise dinâmica de placas sandwich comprimidas simplesmente apoiadas
… were analyzed according to the variations of the shear stiffness of the plate. The results were plotted and are included in this dissertation. lt was also plotted a curve connecting the vibration modes with the critical loads. Through this curve it was possible to find out the smallest value for …
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Vibrações de placas sandwich enrijecidas por barras conectoras
… between the faces which introduce additional stiffness in the core, under compressive uniforme load acting in the midplane, as well as the determination of the critical loads by a dynamical process. The equations of vibration were obtained through the substitution of the constitutive equations …
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Vibrational characteristics of brain magnetic resonance elastography
… non-invasive methodology for the mapping of shear stiffness of the brain. A mechanical actuator shakes the brain and generates shear waves, which are then imaged with a special MRI sequence sensitive to sub-millimeter displacements. This research focuses on exploring the profile of vibrations …
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ANALYSIS OF FRAME-CORE WALL BUILDINGS CONSIDERING EFFECTS OF AXIAL FORCE AND AXIAL DEFORMATION
… approach idealizing the whole structure as a shear-flexure cantilever. The frame components are replaced by continua with equivalent shear rigidity, GA, and flexural stiffness, EIa. The effect of axial force is included in the derivation of shear stiffness. Charts are presented to facilitate …
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NFEA Modeling of RC Beams Having Exposed Longitudinal Reinforcement: Effects of Debonding on Shear Behavior
… element that provides a description of shear response. The element formulation is derived based on a two-dimensional micro-plane approach, where the material state of stress is defined by a two-dimensional state of strain. The advantages of the proposed model over other methods are …
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Probing nanomechanics of aggrecan and the aggrecan-rich pericellular matrix of chondrocytes in cartilage
… which in combination provide the tensile, shear, and compressive stiffness of the tissue. While the collagen network mainly provides resistance to tensile and shear deformation, aggrecan enmeshed within this network contributes significantly to the tissue's compressive and shear properties …
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Supersonic flutter of sandwich panels: effects of face sheet bending stiffness, rotary inertia, and orthotropic core shear stiffnesses
… 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 is eighth order and has constant …
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Constitutive modeling of the finite deformation behavior of membranes possessing a triangulated networked microstructure
… area, yet poses little resistance to planar shear. A skeletal network of spectrin molecules is crosslinked to the lipid bilayer and provides the shear stiffness of the membrane. The planar triangulated structure of the spectrin network is used to identify a representative volume element (RVE) …
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The effect of dynamic shear force on chondrocyte biosynthesis in agarose gels
… network, which accounts for the tensile and shear stiffness of the cartilage. Due to the avascular, aneural, and alymphatic nature of cartilage, its native cells (chondrocytes) have limited regeneration capabilities after injury. Previous investigators discovered that dynamic compressive …
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Design of a constraint device for compliant bodies using quasi-conformal contact surfaces as applied to mouse imaging
… No existing research has measured the shear stiffness of mouse facial tissue or modeled the effect of quasi-conformal contact constraints on nonlinear materials. The constraint devices and techniques currently available for mice have limitations that have prevented further exploration …
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