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Vardon, P.J. (author), Buragohain, Poly (author), Hicks, M.A. (author), Hart, J (author), Fokker, PA (author), Graham, C (author)OPERA-PU-TUD321c<br/>Radioactive substances and ionizing radiation are used in medicine, industry, agriculture, re- search, education and electricity production. This generates radioactive waste. In the Neth- erlands, this waste is collected, treated and stored by COVRA (Centrale Organisatie Voor Radioactief Afval). After interim storage for a...report 2017
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Te Slaa, S. (author)Estuarine systems worldwide contain large quantities of fine (cohesive) sediment. Fate and transport of these sediments is to a large extent governed by erosion and deposition processes. Knowledge on the behaviour of these sediments is required for modeling purposes in order to predict impacts on morphology and environment as a result of e.g....report 2012
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Jönsthövel, T.B. (author), Van Gijzen, M.B. (author), MacLachlan, S. (author), Vuik, C. (author), Scarpas, A. (author)The demand for large FE meshes increases as parallel computing becomes the standard in FE simulations. Direct and iterative solution methods are used to solve the resulting linear systems. Many applications concern composite materials, which are characterized by large discontinuities in the material properties. An example of such a material is...report 2011
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Jönsthövel, T.B. (author), Van Gijzen, M.B. (author), Vuik, C. (author), Scarpas, A. (author)Large discontinuities in material properties, such as encountered in composite materials, lead to ill-conditioned systems of linear equations. These discontinuities give rise to small eigenvalues that may negatively affect the convergence of iterative solution methods such as the Preconditioned Conjugate Gradient (PCG) method. This paper...report 2011
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Husrin, S. (author)Results showed that the existing model on erosion of clay with water-filled cracks (Führböters theory) which only considers cohesion as the soil strength is only applicable for certain conditions. The model should consider other resistant forces such as soil weight and pore pressures. From the tests on clay without water-filled cracks, it...report 2009
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Lesniewska, D. (author)Failure of natural and man-made earth structures is an important environmental hazard in many climatic conditions with significant socio-economic impact. Failures usually appear as sudden catastrophic events. Actually they are triggered by much slower processes of a progressive nature, occurring within the earth mass without any visible external...report 2009
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Kortenhaus, A. (author)This report describes the flood defence structures of the pilot site German Bight Coast and the overall probability of failure of all flood defences in the area. First, the flood prone area is briefly described as follows: ? the flood prone area ? the failures observed in the past ? an overview of all defence structures ? the flood defence...report 2009
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Boukalova, Z.; Benes, V. (author)More than 500,000 km of embankment are used in Europe for transport and flood defence, representing a 1bn infrastructure asset base, which supports and protects the economy of Europe (e.g. property worth some 2,000 bn is protected from flooding.) Presently the state and performance of these embankments can only be investigated visually or by...report 2009
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Neelz, S. (author)This report concerns the analysis of flow/discharge measurements obtained from a set of 441 rigid breach models constructed between 22/07/1996 and 10/12/1998 at the Agricultural Research Service of the United States Department of Agriculture (USDA) in Stillwater, Oklahoma, US, by G.J. Hanson and colleagues. Each model consisted of a rigid...report 2008
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Allsop, W. (author)This report provides an analysis of flood defence asset failure modes, structured acccording to asset and loading type. Failure mode information for each asset is presented in a common format and structured for use within reliability analysis models. The intention is that this document forms a central store of agreed failure mechanisms for flood...report 2007
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Stanczak, G. (author)This report addresses the preparation and performance of laboratory tests on a the erodibility of clay cover with and without grass, subjected to impact pressures generated by controlled falling water mass Three types of clay, representing different erosion resistances as well as grass cover of moderate quality have been used in order to gain...report 2007
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Doorn, N. (author)Report detailing failure modes for flood defence revetments, contributing detailed failure mode information into Task 4 Failure Modes Report.report 2007
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Oumeraci, H. (author)Coastal dikes are used as defence structures against flooding in lowland areas and where high tidal ranges occur. The development of a breach induced by wave overtopping has been one of the most frequent causes of dike failure and it is closely related both to the dynamics of a protected coast and to the flood risk assessment and management. At...report 2006
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Falcao, P.W. (author), Mesbah, A. (author), Suherman, M.V. (author), Wennekes, S. (author)This study was aimed to evaluate the feasibility of using a waste heat stream from DSM for a District Heating System. A conceptual design was carried out with emphasis on the unit for upgrading the residual waste heat. Having reviewed heat pump technology, mechanical heat pump was found to be the best option for recovering the heat from the...report 2005
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Van Westen, C.J. (author)The purpose of the Floris Project The government considers it important that the public has a better understanding of the probability of their area being hit by a flood. The government also wants to have a clear view of the relatively weaker areas in flood protection. Other experts have, moreover, indicated that the protection against flooding...report 2005
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Schra, L. (author)An interlaboratory testing programme to evaluate the rising displacement test for stress corrosion crack (SCO growth investigations was carried out within the framework of the "Measurements and Testing" programme of the European Community under BCR contract nr. MATI CT 930038. The contribution of the NLR to the project consisted of testing of...report 1996
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ten Dam, A.A. (author), Willems, J.C. (author)The aim of this paper is to study, in a system theoretical framework, the contact problem for mechanical systems subject to unilateral constraints. Contrary to what is usually done in studies on this subject, we first investigate what can be deduced already firom the mathematical models of the unconstrained mechanical system and the constraint...report 1996
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Oldersma, A. (author), Wanhill, R.J.H. (author)Discussions between D-BAA and the NLR have shown that significant variability in fatigue crack growth properties is possible for the industry standard damage tolerant aluminium alloy, 2024-T3 sheet. This is important for two reasons: (1) design assumptions and (2) comparisons of different candidate materials, such as 6013-T6, with 2024-T3....report 1996
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Wanhill, R.J.H. (author), Schra, L. (author)An investigation was made of the effect of starter notch geometry on flight simulation fatigue crack growth in three damage tolerant aluminium sheet alloys, 2024-T3, 2091-T84 and 8090-T81. Changing the starter notch geometry resulted in significant differences in initial nonstabilized fatigue crack growth behaviour. However, there was only a...report 1995