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 138 for “"Mechanics of Materials"”.
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Fractals in mechanics of materials
… in geometric characterizations as well as models of various material microstructures and deformation patterns. The first part of this dissertation studies fractal patterns of plastic regions observed in elastoplastic deformations. As a paradigm, we focus on a random material model with microscale …
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On couple stress in the mechanics of materials
… explain observed elastic size effects in these materials, the new material constant ℓ which is characteristic of the couple stress theory must be on the order of magnitude of .02". In order to determine order of magnitude of the constant, a series of experiments was designed based on a thin …
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Micro and nano mechanics of materials response during instrumented frictional sliding
… many computational studies have explored the mechanics of instrumented normal indentation. In contrast, very few studies have investigated quantitative aspects of frictional sliding contact in the elasto-plastic regime. In this thesis, a new framework was developed to establish relationships …
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The Impact of Active Learning Interventions on Student Outcomes in Core Mechanical Engineering Topics
This research focuses on the enhancement of the undergraduate education in mechanical engineering using active learning techniques, and specifically, hands-on learning through the incorporation of student interaction with 3D multi-material printed and machined parts. Complex subjects that impact a …
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In-Situ Testing of a Carbon/Epoxy IsoTruss Reinforced Concrete Foundation Pile
<p>This thesis focuses on the field performance of IsoTruss®-reinforced concrete beam columns for use in driven piles. Experimental investigation included one instrumented carbon/epoxy IsoTruss®-reinforced concrete pile (IRC pile) and one instrumented steel-reinforced concrete pile (SRC pile) which …
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Aplicabilidade da hipótese das seções planas a peças com variação linear ou parabólica da altura da seção transversal
The purpose of this work is to verify the correctness of the limitations established in Chapter 2, Item A.9, of the Brazilian Standard Code NB-1 according to which the inclination of haunchs used to settle the height of slabs and beams at the supports must be 1/3 as a maximum. This study embodies a …
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A new paradigm in teaching large engineering mechanics courses
<p>This study investigated the role of a new paradigm in teaching large introductory fundamental engineering mechanics courses that combines student-centered learning and supplemental student resources. The sample consisted of close to 5000 engineering students from Iowa State University.</p> …
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Mechanics and design of flexible composite fish armor
… fish, a new composite architecture explores the mechanics of materials to accommodate both flexibility and protection. These biological structures consist of overlapping mineralized plates embedded in a compliant tissue to form a natural flexible armor which protects underlying soft tissue and …
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Atomistic simulation of strength and deformation of ceramic materials
This thesis is a study of atomistic measures of strength and deformation of ceramic materials, utilizing molecular dynamics (MD) simulation that incorporates newly developed theoretical models and computational algorithms to probe the microstructural effects in crystalline, amorphous, and …
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Mechanical properties of bio-absorbable materials
… bioabsorbable composites for potential use as materials for orthopedic appliances. The study focuses on Poly(l-lactic acid) (PLLA), Polyglycolic acid (PGA), Poly-e-caprolactone (PCL), matrices with Carbon fibers (AS4), Nylon fibers and PLLA fibers. Fiber coating effects have also been …
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A Multiscale Method for Simulating Fracture in Polycrystalline Metals
The emerging field of nanomechanics is providing a new focus in the study of the mechanics of materials, particularly in simulating fundamental atomic mechanisms involved in the initiation and evolution of damage. Simulating fundamental material processes using first principles in physics strongly …
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The mechanics of precision presplitting
… Presplitting is a widely used method of presplit blasting for the mining and construction industries. In recent years considerable effort has gone into the development of empirical equations based on field data to be able to better design the Precision Presplit for various rock types …
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Failure Prediction of Adhesively Bonded Hardboard Doorskin Joints
… such as hardboard have become very common materials for use in non-structural applications, which include pre-finished paneling, siding, exterior trim, furniture, and door skins. This thesis describes the results of a study of the failure of hardboard door skins. Forces applied during …
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Fatigue Damage Prognosis of Internal Delamination in Composite Plates Under Cyclic Compression Loadings Using Affine Arithmetic as Uncertainty Propagation Tool
… costs and increasing the in-service capacity of a structure. The increased use of lightweight composite materials in aircraft structures drastically increased the effects of fatigue induced damage on their critical structural components and thus the necessity to predict the remaining life of …
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Higher-order discontinuous modelling of fracturing in quasi-brittle materials
… fracturing and potential interaction of fragmented parts. The computational description of this behaviour has presented significant challenges to the mechanics community over the past few decades, driven by the development of technology, the increasing social and economical constraints …
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Experimental Quantification of the Phonon Drag Deformation Mechanism in Metals at Extreme Strain Rates
… above 10⁶ s⁻¹, are seen across many fields of science and engineering; from meteorite impacts and impact induced crystallographic phase changes to high-speed machining and additive manufacturing. Despite the range of applications, many common high-rate impact experiments are intrinsically …
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Novel Photothermal Materials and Thermally Engineered Membranes for Solar Desalination
<p>Although 71% of earth surface is covered with water, more than 97% of it is saltwater, and freshwater is limited to only about 2.5%. The freshwater shortage has been exacerbated due to the environmental pollution, increased agriculture needs, socio-economic development, and population growth. …
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