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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 46 for “"fatigue analysis"”.
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Fretting fatigue analysis and palliatives
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering; and, (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1999.
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MUSCLE FATIGUE ANALYSIS IN MINIMALLY INVASIVE SURGERY
… to excessive ergonomic risks including muscle fatigue that may lead to critical errors in surgical procedures. Therefore, detecting the vulnerable muscles and time-to-fatigue during MIS is of great importance in order to prevent these errors. In this research, different surgical skill and …
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Fatigue analysis for non-normal stochastic stress
… is to determine the relationship between the fatigue damage predicted for Gaussian and nongaussian processes when both are analyzed by the rainflow counting method. Due to a lack of references on nongaussian process simulation, some initial effort is devoted to finding a simple way of …
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Floating production storage offloading unit structural fatigue analysis
This thesis examines the fatigue behaviour of FPSO structures. It has been compiled as a result of theoretical, analytical and experimental study. The Finite Element approach has been utilized to analyse the FPSO's structure. It is intended that this particular work will enable further computer …
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Fatigue analysis and reconstruction of helicopter load spectra
… metal samples are taken as examples, and their fatigue lives are predicted by using a simplified version of the local strain approach. This simplified method requires an input load history in the form of the rain-flow matrix and places bounds on the fatigue life. A peak-valley reconstructed …
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Monitoring and Fatigue Analysis of Suspension Bridge Rocker Arms
… to axial loads. One of the rocker arms developed fatigue cracks and fractured in 2015 causing the deck to descend 150 mm at the expansion joint. The entire rocker arm assembly was replaced, and by 2021 concerns about the other seven rocker arms led to the installation of a monitoring system …
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Design and Fatigue Analysis of an LWD Drill Tool
… in the rotary machines are accounted for fatigue failure. And it is observed that cyclic stresses are more critical than steady stresses when the failure occurred is due to fatigue. One of the most expensive industries involving rotary machines is the Oil and Gas industry. The large …
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Combining laboratory and field data in rail fatigue analysis
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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Stress and fatigue analysis of SVI-tested camshaft lobes
… profilometry were used to characterize wear and fatigue, crack depth, and surface roughness, respectively. Results show cracking to occur mainly in the opening ramp of the most abusively ground cam lobes. No clear evidence was found for subsurface cracking at depths as great as 200 μm from the …
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Refined structural modeling for progressive damage and fatigue analysis of composite structures
L'abstract è presente nell'allegato / the abstract is in the attachment
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Effective Length of Fractured Wires and a Fatigue Analysis of Wire Rope
This work is initially concerned with a determination of the contact loads and stresses between the wires in a wire rope under axial loading. The rope is regarded as a collection of smooth helical rods. The determination of the contact stresses between wires is based on the solution of Hertz's …
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Design, build and test of an axial flow hydrokinetic turbine with fatigue analysis
… an open source propeller and turbine design and analysis code that has been in development since 2007 by MIT graduate students under the supervision of Professor Richard Kimball. In order to test the performance predictions of OpenProp for axial flow hydrokinetic turbines, a test fixture was …
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Development of interactive computer programs for mechanical engineering design: fatigue analysis, section properties, and beam analysis
… programs for mechanical engineering design: Fatigue Analysis, Section Properties, and Beam Analysis. The Fatigue Analysis program sizes up a mechanical component, circular, rectangular, or any shape, to prevent fatigue failure. Six most generally accepted fatigue failure lines are available …
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Extension of the Local Strain Fatigue Analysis Concepts to Incorporate Time Dependent Deformation in Titanium(6)-Aluminum(4)-Vanadium at Room Temperature (Fatigue)
… incorporated into the existing framework of the fatigue life prediction methods based upon the local strain approach. This methodology has been developed over the last twenty years to analyze the time independent deformation and damage characteristics of notched members subjected to fatigue …
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Fatigue Damage Analysis in Asphalt Concrete Mixtures Based Upon Dissipated Energy Concepts
… results of this study provide a foundation for fatigue analysis based on dissipated energy concepts. Using the dissipated energy concepts in fatigue analysis make it possible to account for damage in a straightforward manner. The energy fatigue relation is easy, simple and based on a theory it …
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Fatigue optimization of an induction hardened shaft under combined loading
… procedure, combining finite element modeling and fatigue analysis methods, is developed and applied to the fatigue optimization of a notched, induction hardened, steel shaft subjected to combined bending and torsional loading. Finite element analysis is used first to develop unit-load factors for …
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Modeling Fatigue Behavior of 3D Printed Titanium Alloys
… of the crack formation this phenomenon is called fatigue. Fatigue properties are critical for structures subject to cyclic load; hence fatigue analysis is used to predict the life of the material. Fatigue analysis plays an important role in optimizing the design of the 3D printed material and …
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Modeling cycle and time dependent creep/relaxation effects on fatigue lives of notched members
… for metals even at room temperature. Many fatigue analysis procedures ignore these variations. Fatigue analysis which included both time and cycle dependent mechanical material behavior for metals at room temperature had not been previously studied except for the case of creep. An …
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