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 1037 for “"Cracks"”.
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Listening through the cracks
Kyne is an outsider: a white, Danish girl, living in a country where the majority are blacks and the few whites are English. Her sentiments of belonging and integration are lost when her family's farms are taken away by the dictatorship government in 2004. The country, Zimbabwe, spirals out of …
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Cracks in the Glass Ceiling
Bias against female political candidates has been a hot-button issue, especially during and after the 2016 election, and the media is not exempt from being a part of the discussion. The overall question that this article proposes is whether there is a definitive bias against female political …
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Finite Opening of Propagating Shear Cracks
Molecular Dynamics (MD) simulations of shear-dominated crack propagation by Abraham and Gao (2000) showed that there was finite crack opening when the crack propagated at a sub-Rayleigh speed while the crack opening became negligible when the crack propagated faster than the shear wave speed. On …
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Investigation of desiccation cracks in drying soil
This research investigates desiccation cracking behaviour of a fill material from a flood embankment along the Bengawan Solo River in East Java, Indonesia, an area that is prone to extremes in flooding and drying. A detailed study of the previous works on this topic showed the absence of …
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Characterization of stress-induced cracks in rocks
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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On elastic-plastic cracks between dissimilar media
Includes bibliographical references.
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Fatigue growth and closure of short cracks
… the growth and closure behavior of short cracks in 2024-T351 aluminum alloy and four different conditions of 4340 steel using through thickness cracks of straight fronts. The experiments were carried out to study the influence of stress level, stress ratio, yield strength and prior …
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Analysis of Composite Laminates with Matrix Cracks
… redistribution due to the existence of matrix cracks. Both transverse cracks (2-D problem) and cross (transverse and longitudinal) cracks (3-D problem) are studied. Results for graphite/epoxy cross-ply laminates are presented and compared to those of other approaches. Some other materials, for …
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Closure of fatigue cracks at high strains
… specimens to study the closure behavior of short cracks at high cyclic strains under completely reversed cycling. Testing procedures and methodology, and closure measurement techniques, are described in detail. The strain levels chosen for the study cover from predominantly elastic to grossly …
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Development of potholes from cracks in flexible pavements
… on road pavement surface. The development of cracks and the formation of potholes on road surface are widespread problems in road construction and maintenance. The objective of this study is to develop mathematical models to compute stresses and deflections associated with the cracks in …
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Semantic Segmentation and 3D Reconstruction of Concrete Cracks
… such as buildings, sidewalks, dams and bridges. Cracks are among the most prominent damages in such structures. In this research, a computer vision and machine learning-based solution for identifying and modeling cracks in concrete structures from high-resolution images captured by a stereo …
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Dynamic Analysis of Interfacial Cracks in Composite Laminates
… of dynamic stress singularity of interfacial cracks is derived, and a hybrid finite element method is successfully developed for this problem. Both the cases of open and closed cracks are considered. An integral transform, the Wiener-Hopf technique, and an asymptotic theory have been used for …
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Analysis of cracks in nonlinear fiber composite materials
… composites. Orders of stress singularity near cracks in both 0$\sp\circ$- and 90$\sp\circ$-fiber composites are obtained. A dimensional analysis based on conservation integrals in nonlinear mechanics is used first to achieve this goal. Also, the stress singularities and asymptotic stress fields …
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Analysis of the interaction of two parallel surface cracks
… analyze and predict the interaction of surface cracks that occur in parallel planes. Multiple cracks may form in aging aircraft that forms at stress concentrations such as fastener holes and notched components by stress corrosion and fatigue cracking. The lifetime of the structures are …
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The microstructural evolution of fatigue cracks in FCC metals
… The microstructure at arrested fatigue cracks on the free surface was compared to the microstructure found beneath striations on the fracture surfaces by utilizing FIB micromachining to create site-specific TEM samples. The evolved microstructure depended on the slip type. Strong …
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The Propagation of Stress Corrosion Cracks in Alpha-Brasses
… transgranular and intergranular stress corrosion cracks in commercial grade alpha-brasses tested in a tarnishing ammoniacal solution. Observation of the surface crack traces indicated that the transgranular cracks propagated discontinuously by the sudden appearance, in its entirety, of a fine …
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