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Montanari, A. (author), Shoemaker, C.A. (author), Van de Giesen, N.C. (author)This paper introduces the Water Resources Research special section on Uncertainty Assessment in Surface and Subsurface Hydrology. Over the past years, hydrological literature has seen a large increase in the number of papers dealing with uncertainty. In this article, we present an overview of the different sources of uncertainty and the...journal article
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Bohemia, E. (author), Lauche, K. (author), Harman, K. (author)The purpose of this paper is to initiate discussion and guide a proposed workshop on issues in cross-institutional and cross-disciplinary design studios, with a focus on assessment. This paper overviews issues associated with the implementation and coordination of the Global Studio, a recent cross-disciplinary and cross-institutional teaching...conference paper
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Abbink, F.J. (author)Modern avionics are an integral part of the aircraft. They provide the functions of communication, navigation, energy management, identification, weather, terrain, and collision avoidance, the presentation of flight and warning data as well as aircraft guidance and stabilization. New developments in micro-electronics and display technology...report 1980
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van der Veen, J.C.T. (author)Fiber optics, a rapidly advancing new technology, seems very well suited for use as data transmission medium in aircraft. The advantages are substantial: galvanic isolation, electromagnetic compatibility, savings in volume and weight, and superior transmission qualities. In this report possibilities and limitations are discussed for using...report 1983
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- Holzmann, G.J. (author) journal article 1984
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Oskam, B. (author), van den Berg, B. (author)The symposium demonstrated the importance of research in the area of mechanical high-lift systems for transport aircraft to improve the total performance of current transports. Computational techniques are shown to provide new tools for high-lift design. With regard to drag reduction by laminar flow control it is concluded that the information...report 1985
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de Jonge, J.B. (author)This report reviews the applicability of damage tolerance concepts to helicopter structures. After a general discussion of the damage tolerance concept, attention is paid to the specific aspects of the helicopter loading environment. Examples are presented of damage tolerant design, both in metal and in composite structures. However, it is felt...report 1986
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Vlieger, H. (author)Some consequences of application of the current damage tolerance airworthiness requirements for transport aircraft in designing stiffened-skin structures to be safe under all operational load conditions are discussed. Compliance with these requirements may be shown by analysis supported by test evidence. To provide the designer with analytical...report 1986
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de Koning, A.U. (author)As an introduction the practical significance of fatigue crack growth life prediction is related to the service life, the inspection period and the fracture control requirements. Then different aspects of fatigue crack growth in metallic materials are discussed in more detail. Important effects such as chemical environment, short cracks, crack...report 1987
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't Hart, W.G.J. (author)The damage development In notched (± 45, 0„, 90, 0-) carbon-epoxy coupon specimens tested under different loading conditions was determined. Constant amplitude tests at R = -1 and R = 0.1 as well as flight simulation tests were performed to establish those stress values for which no damage growth occurs.report 1988
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- Van Der Zande, M.J.M. (author), Bovy, P.H.L. (author) report 1989
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't Hart, W.G.J. (author), Frijns, R.H.W.M. (author)Constant amplitude tension-compression fatigue tests were performed on notched (± 45, 02, 90, 02)s coupon specimens of the composite systems T300/F593, T400H/6376, T800H//5245C and IM6/APC-2. Delamination damage growth as a function of the number of fatigue cycles was determined using the ultrasonic C-scan technique. Considering the resistance...report 1989
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de Jonge, J.B. (author)Paper presented at the 17th ICAS Congress, Stockholm, September 1990. The actual service load experience of aircraft may differ appreciably from design assumptions. The necessity to monitor service loads is generally recognized now for military aircraft. This paper starts with a general review of the overall life management procedure commonly...report 1990
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Donkers, J.C. (author), Piers, M.A. (author)Maintenance organisations experience an increasing pressure to optimize the availability of company assets. Meanwhile the complexity of systems increases. As a consequence, there is a need for tools with which maintenance can be performed more effectively and efficiently. NLR is engaged in applied research into knowledge-based systems for...report 1990
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Jentink, H.W. (author)This report concerns the application of laser anemometry for flight testing and other aircraft-related measurements. The laser anemometry technique and previous work in this field are reviewed and applications are described. A comparison of possibilities of laser anemometry with conventional techniques shows some unique advantages of laser...report 1990
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de Jonge, J.B. (author), Bartelds, G. (author)The problems of Ageing Aircraft are worldwide. Hence, actions to overcome or prevent these problems should be taken in international collaboration. The Federal Aviation Administration FAA and the Netherlands Civil Aviation Department RLD have signed a Memorandum of Cooperation in the area of structural integrity, with specific reference to...report 1991
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Lamberti, A. (author)During the last few decades the believe that absolute security could be provided has been recognized to be mistaken in many branches of engineering. This happens as a consequence of the imperfect predictability of load intensity, structural characteristics and structural behavior, as well as a consequence of human gross errors during the design...report 1992
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- Hoozemans, F.M.J. (author), Stive, M.J.F. (author), Bijlsma, L. (author) conference paper 1993
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- Hoozemans, F.M.J. (author), Marchand, M. (author), Pennekamp, H.A. (author) report 1993
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Labonté, S. (author), Wiggenraad, J.F.M. (author)A preliminary investigation is reported of the development of a Structure Relevant (SR-) specimen, which maintains the essential features of a stiffened panel configuration, in order to study damage growth behavior at limited cost. Several SR-specimens were fabricated, damage was applied, either through impacts or by the insertion of artificial...report 1993