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 19 of 19 for “"Cyclic Deformation"”.
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Cyclic deformation of a clay
… used to measure pore-pressure, axial load and deformation. The effects of strain amplitude and stress history on the peak shear stresses, the mean effective stress and the specific damping energy were investigated. Mean effective stress, which showed negligible cyclic variation, decreased …
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Cyclic deformation of FCC crystals
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Cyclic Deformation and Fatigue Behavior of Hardened Steels
Made available in DSpace on 2014-12-10T17:25:50Z (GMT). No. of bitstreams: 1 6915342.pdf: 3082155 bytes, checksum: b047ae8e380904f3539fc617579f48bc (MD5) Previous issue date: 1969
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Stored Energy of Cold Work Changes Induced by Cyclic Deformation
Made available in DSpace on 2014-12-10T17:25:36Z (GMT). No. of bitstreams: 1 6612343.pdf: 2266804 bytes, checksum: ddcac6fc0f14c4d75fc8b836f6deee44 (MD5) Previous issue date: 1966
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Cyclic deformation of monocrystalline nickel aluminide and high temperature coatings
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Characterization of the fatigue behavior of additively manufactured β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr on different length scales
… This thesis investigates the fatigue and cyclic deformation behavior on different length scales of Ti-5553, made by laser powder bed fusion of metals (LPBF-M), with distinct microstructures resulting from different heat treatments. The nano-scale investigation reveals how the …
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Stress disturbance on the cyclic behavior of soils and its impact on geotechnical structures
… along different stress paths and affects the deformation behavior of soils under cyclic loading. To study the impact of stress disturbance on soil behaviour under cyclic loading, a large number of cyclic triaxial tests were carried out to investigate the cyclic deformation behavior of typical …
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Characterization of Delamination in 2099-T861 Aluminum-Lithium
… delaminations were also observed after cyclic deformation of both uniaxial and torsion experiments. Many of the experimental observations, such as rate insensitivity and crystallographic orientation, were incorporated into a cyclically stable crystal plasticity framework with rate …
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Monotonic and Cyclic Simulation of Screw-Fastened Connections for Cold-Formed Steel Framing
… an approach for modeling the monotonic and cyclic response of cold-formed steel framing screw-fastened connections in commercial finite element programs. The model proposed and verified herein lays the groundwork for seismic modeling of cold-formed steel (CFS) framing including shear walls, …
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The Deformation and Fracture of Thick Thermal Barrier Coatings
… response under multiaxial stress states, the deformation mechanisms, failure criteria, and the constitutive relations. In this study, the deformation behavior, the deformation mechanisms, and the failure criteria were investigated. The results shows that under combined axial and shear loading, …
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The Constitutive Behavior of Thick Thermal Barrier Coatings
… The focus of this study was to assess the deformation behavior of a plasma-sprayed ZrO-25wt%CeO2-2.5wt%Y2O3 coating material and to determine the critical features that will affect its durability in service. Using a novel specimen design that allowed testing independent of a substrate, it …
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Dynamic actuation properties of Ni-Mn-Ga ferromagnetic shape memory alloys
… stresses, the mechanical energy density during cyclic deformation was 65 kJ/m3 at the expense of 20 kJ/m3 lost An important first observation of dynamic stress vs. field behavior is understood by an extension of a magnetomechanical phenomenological model.
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Deformation-assisted antifouling of surfaces
… new surface materials, surface vibration, large deformation or heating (for deicing only) The problem of fouling is especially severe in the case of membrane processes due to the variety of foulant types that comes in contact with the membrane surface, the limitation, and complexity of …
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Mechanism of subcritical crack growth in the alumina reinforced aluminum-copper composite: Effects of interface and matrix microstructure
… fatigue crack growth was accelerated by cyclic-deformation induced crack-tip overaging at 150$\sp\circ$C and by softening of the composite at 300$\sp\circ$C.
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MECHANICALLY ROBUST BIOCOMPATIBLE POLYMERIC NETWORKS FOR REPETITIVE LOADING
… strength and irreversible damage under cyclic deformation, while traditional dental resins lack strong bonding to mineralized tissues and suffer from limited biofunctionality. To address these challenges, this work presents two classes of engineered polymer networks designed for enhanced …
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Deformation behaviour of bitumen and bituminous mixes
… accurate models for the transient monotonic and cyclic deformation behaviour of bitumen and asphalt mixes. The first part of this dissertation is concerned with an experimental and theoretical investigation of the deformation behaviour of bitumen. The second part is concerned with the deformation …
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Fatigue stiffness loss and life prediction technique development of a real rubber automotive component by means of Finite Element Analysis
… topics to be analyzed: material mono tonic and cyclic deformation behaviours, knowledge of stress/strain histories, the fatigue life and failure plane associated with the nucleation of cracks and their subsequent growth, fatigue damage quantification parameters, cycling control type, influence …
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Tensile, Creep, and Fatigue Behaviors of Thermoplastics Including Thickness, Mold Flow Direction, Mean Stress, Temperature, and Loading Rate Effects
… model for metals was used to model the tensile deformation behavior, in addition to other models specific to polymeric materials. Creep tests were conducted at room temperature, 85¿¿C, and 125¿¿C at various stress levels, and data from these tests were used to model the creepdeformation behavior …
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Origin of Creep-Fatigue Back Stress and its Effect on Deformation and Damage
Creep deformation of metals operating at a high temperature in electricity generation plant can limit the lifetime of components and pressurized systems. Assessment of a structure’s creep life under power plant operation conditions is a complex problem due to materials being exposed to cyclic load …