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 312 for “"Flexure"”.
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Flexure of Cranial Bone
Made available in DSpace on 2014-12-12T00:25:44Z (GMT). No. of bitstreams: 1 7105131.pdf: 2447832 bytes, checksum: f22d01cb9ce29d88ab379b3da200fd56 (MD5) Previous issue date: 1970
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Analysis of novel flexure-based joint
… get smaller, so must their moving parts. A novel flexure-based joint was developed for Squishbot1 by a team at MIT, which can be made small (sub-cm), or much larger. Here, pseudo-rigid-body modeling is used in conjunction with the geometry of the joint mechanism in order to create analytic models …
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Flexure modulus of elasticity in living branch wood
… effects of localized tree impacts on targets. Flexure modulus of elasticity (MOE) can be defined as an object's tendency to be deformed elastically, or not permanently, when a force is applied to it This research measures flexure modulus distally along the length of the branch as well as …
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Flexure-based nanopositioning systems : integrated design and control
This thesis deals with the design and control of flexure-based mechanisms for applications requiring multi-degree-of-freedom positioning and alignment. Example applications include positioning a probe or sample in atomic force microscopy, alignment of tool and sample in stamping processes, and …
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Lithospheric flexure of the Devils Lake Basin, North Dakota
… load of 3.32*1013 N from water on Earth's crust. Flexure models show that, using this load, the lithosphere should be deflecting approximately 30 cm at present, assuming mantle viscosities ranging from 1020 to 1021 Pas, Poissons ratio of 0.22 and an elastic lithosphere thickness of 30 km. </p><p> …
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Strength and Behavior in Flexure of Prestressed Concrete Beams
Made available in DSpace on 2014-12-05T17:37:11Z (GMT). No. of bitstreams: 1 6004013.pdf: 10248390 bytes, checksum: 1ae67488e43788c380fd1a010ddd07ee (MD5) Previous issue date: 1960
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Synthesis and analysis of parallel Kinematic XY flexure mechanisms
This thesis presents a family of XY flexure mechanisms with large ranges of motion, first-order decoupled degrees of freedom, and small parasitic error motions. Synthesis is based on an systematic and symmetric layout of constraints that are realized by means of common flexure building blocks. An …
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Flexure-Based Device Enables Precise Quantitative Monitoring of Muscle Performance
… contractile data. This paper proposes using a flexure-based device that enables decoding of muscle physiological signals – such as contraction force, contraction time, and relaxation time – in a more precise, reproducible, and automated manner.
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Design and analysis of a monolithic flexure atomic force microscope
… to move in one degree of freedom by a monolithic flexure. A piezoelectric actuator drives the moving stage while three capacitance sensors provide a non-contact direct measurement of the displacement. A decoupling flexure prohibits the error motions of the actuator from propagating into the moving …
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Design of planar-flexure-based contacts for high-repeatability kinematic couplings
… manufacturing processes and metrology systems. Flexures serve to improve the performance of ball-and-flat contacts by preventing motion of the flats in the direction perpendicular to the contacts while allowing motion in tangential directions, thus reducing the effects of friction and wear at …
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Design of parallel flexure systems via Freedom and Constraint Topologies (FACT)
… a form that designers can use to design parallel flexure systems. The framework that links these topologies enables designers to create three-dimensional, multi-axis flexure systems by using "Freedom and Constraint Topologies" (FACT). FACT embodies every possible design solution for parallel …
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Bridging Simple Models and Observations of the Flexure Zone around Antarctica
This study evaluates whether the length of ice flexure zones in Antarctica can be used to infer the thickness of the ice and the effective Young’s modulus using a 1-D linear elastic beam bending model. The ice flexure zone is defined as the transition region between the grounded ice sheet and the …
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Flexure based mounts for sensitive payloads : a management and engineering study
With the cooperation of the Los Alamos National Laboratory and the Massachusetts Institute of Technology, an investigative and design study was performed to examine the history of the W80- 0 Area Aft Mount, understand its performance, and explore potential new designs. Simultaneously, professional …
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Design and optimization of x-y-[t̳h̳e̳t̳a̳]z̳, cylindrical flexure stage
Cylindrical flexures (CFs) are composed of curved beams whose length is defined by a radius, R, and a sweep angle, [phi], [1]. The curved nature of the beams results in additional kinematics, requiring additional design rules beyond those used for straight-beam flexures. The curvature also adds …
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Experimental Evaluation of Composite Action of Steel Box Truss Towers in Flexure
… action exhibited by steel box truss towers in flexure. Three tower configurations, each with three specimens, were constructed and tested. Strain, slip, deflection, and load measurements were used to assess the performance of each configuration. The specimens were 40 feet long and simply …
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Flexure of the oceanic lithosphere in the vicinity of the Marquesas Islands
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Kinematics of beam flexure four-bar linkages with applications in a compound bow
… linkage is replaced by a cantilevered beam in flexure to produce a force generating mechanism. Second, the synthesis method presented here allows the generation of these mechanisms in closed form for prescribed force generation. A compound archery bow that incorporates four-bar linkages has …
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