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Calibri 83ffff̙̙3f3fff3f3f33333f33333.TU Delft RepositorygV)uuidrepository linktitleauthorcontributorpublication yearabstract
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departmentresearch group programmeprojectcoordinates)uuid:ee4cc20c-1b1a-4c74-8cf9-3ccae1cbd4eaDhttp://resolver.tudelft.nl/uuid:ee4cc20c-1b1a-4c74-8cf9-3ccae1cbd4eaJResidual Stress Analysis within Structures using Incremental Hole DrillingWNegem, Taha (TU Delft Aerospace Engineering; TU Delft Aerospace Structures & Materials)QSinke, Jos (mentor); Delft University of Technology (degree granting institution)Residual stress analysis within hybrid structures is the focus of this study. The non linear stresses through the thickness are determined using a semi-destructive method known as Incremental Hole Drilling (IHD). Finite element modeling is used to build a mathematical code simulating GLARE laminates with initial residual stresses applied. The code includes the structure, orientation, mechanical and micro-thermal properties of the constituents into account. Matrices of elastic coefficients that represent the stress-strain relation within the laminate are found. In addition, strain responses are measured during incremental hole drilling of the GLARE laminates using tools specifically designed for hole drilling. Using the numerically determined matrices in conjugation with the experimental strain outputs lead to the computation of residual stresses. Verification and validation of the simulation models and the stress results are done through the use of theoretical methods such as the Classical Laminate Theory.Stress Analysis; Glare; Strain Measurement; Hole Drilling; Incremental Hole Drilling; Nonlinear stress Analysis; Finite Element Modeling; ANSYS APDLen
master thesis)uuid:5f52fae0-3bc6-47c3-b066-28725bf2223bDhttp://resolver.tudelft.nl/uuid:5f52fae0-3bc6-47c3-b066-28725bf2223bVFatigue analysis of discharge area of 26kl tank container under railway transportationEZhang, Shuo (TU Delft Mechanical, Maritime and Materials Engineering)Romeijn, Arie (mentor); den Besten, Henk (mentor); Kassapoglou, Christos (mentor); Broeders, Patrick (mentor); Delft University of Technology (degree granting institution)Tank containers are intermodal containers for the transport of liquids, gases, and powders as bulk cargo However, hazardous vibration during transportation would generate fatigue damage at discharge area. This thesis aims at calculating fatigue damage at discharge area of a specified tank container. <br/><br/>The calculation is performed in time domain. With FEM models and measured input, hot spot stress is calculated for each hot spot. Probability distributions projects the stress distribution to a longer period thus fatigue damage for 20 years is calculated.<br/><br/>The available data consists of acceleration and velocity of the container during a typical train transportation. A global model and a local model are established with FEM software package. Experimental data from the Lloyd register are used to verify the global model.<br/><br/>In conclusion, during the typical transportation period, fatigue will occur at one of the hotspots. <br/><brGFatigue Analysis; Hot spot stress; Time domain calculations; ANSYS APDL
2019-06-30
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