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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 121 for “"STRESS-CONCENTRATIONS"”.
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Stress Concentrations in Three-Dimensional Electrostriction
Made available in DSpace on 2014-12-10T17:25:37Z (GMT). No. of bitstreams: 1 6612428.pdf: 1071869 bytes, checksum: b1f1bebfd84d5c64b7f2a150e89c1856 (MD5) Previous issue date: 1966
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Three-Dimensional Non-Axisymmetric Anisotropic Stress Concentrations
Unified explicit analytical solutions for the (non-axisymmetric) first and second boundary value problems of elasticity theory for a spheroidal cavity embedded in a transversely isotropic medium are presented. The analysis is based upon solutions of the homogeneous displacement equations of …
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Stress Concentrations Around Cutouts in Shells of Revolution
Made available in DSpace on 2014-12-04T23:11:10Z (GMT). No. of bitstreams: 1 6402864.pdf: 1970982 bytes, checksum: 4cca6a80bae2926bf0258e2890b4e038 (MD5) Previous issue date: 1963
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Boundary Integral Equation Solution of Plane Elasticity Problems With High Stress Concentrations
Made available in DSpace on 2014-12-13T19:31:56Z (GMT). No. of bitstreams: 1 8004240.pdf: 3579108 bytes, checksum: dd453a47fef151467431b22b1cec3ccd (MD5) Previous issue date: 1979
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Stress concentrations in undercut spur gear teeth via the finite element method
… analysis of the influence of undercutting on the stress concentration factor for undercut gears using the finite element method is presented. The models used are in the shape of a whole gear with three teeth. The middle tooth is loaded assuming single-tooth contact. Thirty seven finite element …
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Reliability and failure analysis of composite beams and plates containing stress concentrations
… such as beams and plates with and without stress raisers are investigated experimentally and analytically. For structures with geometrical irregularities such as notches, holes or cut-outs, no analytical solutions exist and approximate numerical schemes have to be employed. For this …
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The effects of bronze and composite sleeves on trunnion yoke plate stress concentrations
… yoke plates have been sized for an average stress based on the projected bearing area between the trunnion shaft and the yoke plate; however, finite element analyses proved that the stress is not uniform across the thickness of the yoke plate. The non-uniform stress distribution is …
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Numerical Modeling for Increased Understanding of the Behavior and Performance of Coal Mine Stoppings
… failure mechanism consists of development of stress concentrations where a height difference as small as 1/32â exists between adjacent blocks. These stress concentrations lead to tensile cracking and, ultimately, premature failure of the wall.
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Investigation of induced strain actuator patches implementing modeling techniques and design considerations to reduce critical stress
… actuator (ISA) patches are the considerably high stress gradients introduced at the edges of the actuator patches when an electric field is applied. These excessive stress gradients initiate debonding of the actuators from the substrate, thus affecting the mechanical reliability of the structure. …
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Permeability and strength of artificially controlled porous media
… that would be able to withstand the rock closure stresses and also remain conductive. A three-dimensional finite element model was developed to study the effects of the shape and the arrangement of inclusions (voids) in the material. Spherical and cylindrical inclusions were studied. Three …
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The development of a modified biaxial composite test specimen
… rather than uni-axial loading due to high stress concentrations at the intersecting loading arms. To reduce the stress concentration in the loading arms the intersection points are rounded and curved inward toward the center of the specimen. By having the curvature of the intersecting arms …
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ΑΝΑΓΩΓΗ ΠΡΟΒΛΗΜΑΤΩΝ ΛΩΡΙΔΑΣ ΜΕ Η ΧΩΡΙΣ ΕΝΙΣΧΥΣΕΙΣ, ΣΕ ΕΠΙΛΥΣΗ ΙΔΙΟΜΟΡΦΩΝ ΟΛΟΚΛΗΡΩΤΙΚΩΝ ΕΞΙΣΩΣΕΩΝ
WE FIND THE STRESS INTENSITY FACTOR FOR A CRACKED STRIP WITH A HOLE AND ALSO THE STRESS CONCENTRATIONS. WE FACE THE PROBLEM OF A DISLOCATION IN TWO STRIPS WHICH ARE MADE FROM DIFFERENT MATERIALS . WE SOLVE ALSO THE PROBLEM OF A DISLOCATION IN A STRIP WITH STIFFNERS FROM BOTH SIDES WHICH ARE MADE …
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Mechanics of Fiber-Controlled Behavior in Polymeric Composite Materials
… systems rely on accurate estimates of the local stress and material states for each of the constituents, as well as the manner in which the constituents interact. In this work, an number of approaches to estimating the stress states and interactions are developed. First, an elasticity solution is …
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Large Strain Finite Element Analysis of Spinodal Shell Structures
… continuous doubly curved surfaces with minimal stress concentrations. In this work, finite element analysis was used to model spinodal shell structures, allowing the study of the architecture properties and inspection into the interior of the structure to allow a better understanding of the …
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Nonlinear three-dimensional behavior of shear-wall dominant reinforced concrete building structures
… slab-wall interaction, floor flexibilities, stress concentrations around the openings, the location and the amount of the main discrete reinforcements are investigated. For this purpose 2 story and 5 story building structures are modelled. To see the importance of 3-D modelling, the same …
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An investigation of polymer wear due to fatigue using a constant strain wear test
… in an interfacial region at the surface due to stress concentrations resulting from surface irregularities, inhomogeneities, and localized adhesive forces. The adhesive forces were seen to increase as the number of cycles of the test increased eventually becoming the dominant frictional force.
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Multiobjective Optimization and Analysis of Slotted Waveguide Antenna Stiffened Structures
… first stage centered around accounting for the stress concentrations present at the corners of the slots. These points led to local failure around the slots prior to the buckling of the overall structure, but the development of a concentration factor curve fit accounted for these in the …
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Thermal stresses in coatings on carbon-carbon composites
… of this study was to investigate thermal stresses in oxidation protection coatings on carbon-carbon composites. Multilayer coatings with each layer of coating applied at a different temperature, and gradient coatings with continuously varying properties through the thickness of the coating …
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Locking plates for distal femur fractures does an increased working length improve healing?
… configurations that cause excessive hardware stress concentrations. In an attempt to address these problems longer plates and an increased working length have been proposed to reduce construct rigidity. The purpose of our study is to investigate whether an increased working length translates …
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Quantitative Analysis of the Compressive Stress Distributions across Pallet Decks Supporting Packaging in Simulated Warehouse Storage
… was to quantitatively analyze compressive static stress distributions across pallet deck surfaces supporting flexible and rigid packaging in simulated warehouse storage systems. Three different densities of polyolefin foams (2, 4, and 6 lb/ft3, pcf) simulated a variety of flexible and rigid …
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