Searched for: subject%3A%22SD%255C%2B%255C-%255C%2BStructural%255C%2BDynamics%22
(81 - 100 of 178)
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Voormeeren, L.O. (author), Atli-Veltin, B. (author), Vredeveldt, A.W. (author)The increasing use of liquefied natural gas (LNG) as bunker fuel in ships, calls for an elaborate study regarding the risks involved. One particular issue is the vulnerability of cryogenic LNG storage tanks with respect to impact loadings, such as ship collisions and dropped objects. This requires an understanding of the impact resistance of the...conference paper 2014
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Walters, C.L. (author)It is well-known that for fracture, ferritic steels undergo a sudden transition from ductile behavior at higher temperatures to brittle cleavage failure at lower temperatures. However, this phenomenon has not received much attention in the literature on fatigue. The so-called Fatigue Ductile-Brittle Transition (FDBT) has been identified in the...article 2014
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Voormeeren, L.O. (author), Tang, L. (author), Walters, C.L. (author), Vredeveldt, A.W. (author)Crash analysis in the maritime and offshore industry typically relies on failure criteria that are based only on uniaxial states of stress. However, it is well known that the failure strain depends on the state of stress, and the state of stress in ship collisions is not necessarily uniaxial. Although more detailed failure models are routine in...conference paper 2014
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- Walters, C.L. (author) public lecture 2014
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Walters, C.L. (author), Dragt, R.C. (author), Romeijn, E. (author), van der Weijde, G.D. (author)In this paper, the applicability of currently-available S355 and S690 steels to Arctic applications is estimated according to current classification rules. A database of results used for quality control for offshore structures that were not necessarily designed for Arctic operations was analyzed. The results needed to be extrapolated to lower...conference paper 2014
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Tang, L. (author), Walters, C.L. (author)Cleavage fracture of steel is governed by micromechanical mechanisms, but it is modelled with simple continuumlevel models. These models are starting to reach the limits of their applicability, so there is interest to look deeper into micromechanical modelling of fracture processes. In order to model fracture on the microstructural level, a...article 2014
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Atli-Veltin, B. (author), Vredeveldt, A.W. (author)Shipping is gradually embracing natural gas as bunker fuel. The most viable way to store natural gas on board is in its liquid form. Gas needs to be cooled to cryogenic temperatures and in practice moderately pressurized. On board ships, solely double walled pressure tanks are used for this purpose. Loss of containment due to a collision, is one...conference paper 2014
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van Aanhold, J.E. (author), Trouwborst, W. (author), Vaders, J.A.A. (author)In order to satisfy the need for good quality UNDEX response estimates of naval ships, TNO developed the Simplified Interaction Tool (SIT) for underwater shock analysis. The SIT is a module of user routines linked to LS-DYNA, which generates the UNDEX loading on the wet hull of a 3D finite element model of the ship structure by means of...conference paper 2014
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Bronkhorst, A.J. (author), Geurts, C.P.W. (author), van Bentum, C.A. (author), Blocken, B. (author)The influence of interference between two high-rise building models on the minimum peak pressures was investigated in an atmospheric boundary layer wind tunnel. Pressure measur€ments were performed on a square model with an aspect ratio of 1 to 4. The influence of an interfering model with the same height as well as half the height was...conference paper 2014
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Vergeer, R. (author), Courage, W.M.G. (author), van Elst, N.P. (author), Huibregtse, J.N. (author), de Jong, T. (author)Expert judgement is een wijze voor het verzamelen van informatie van experts over een probleem of onderwerp, waarbij de verschillende experts op een valide wijze rekenkundig geaggregeerd worden.report 2014
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- van Bentum, C.A. (author) article 2013
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van den Berg, R.L.J. (author), Steenbergen, R.D.J.M. (author)In this paper, a damping model for a high-rise building is introduced. This model is used to investigate the possibilities to identify the relative damping contribution of the internal material damping in building elements, energy loss at element interfaces and energy outflow at the interface with the ground. The building is modeled as an Euler...conference paper 2013
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Geurts, C.P.W. (author), van Bentum, C.A. (author), Willemsen, E. (author)This paper addresses questions that arose during development and application of the Dutch guideline for wind tunnel testing to determine wind loads on buildings. This guideline (CUR 103) is being used since 2005, and a first revision is foreseen. Within this revision, the relation with Eurocode EN 1991- 1-4 is established. Questions to be...conference paper 2013
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Walters, C.L. (author), van der Weijde, G.D. (author)A low-cost variation of CTOD testing is proposed. This variation follows BS7448, but has several nonstandard deviations, including: • Using a fixed notch width of 0.5 mm. • Using fatigue pre-cracks that are shorter than normal requirements to save the associated expense. • Using Single Edge Notched 3-point Bending (SENB) specimens with cross...conference paper 2013
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Walters, C.L. (author)The current paper provides a procedure for adjusting the failure strain of shell elements based on both mesh size and stress triaxiality. This procedure is a general framework that gives a homogenisation of a neck over the entire length of an element and it uses an arbitrary forming limit diagram (FLD) and stress triaxiality-based failure...article 2013
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Walters, C.L. (author), Voormeeren, L.O. (author)The minimum pre-crack necessary to achieve an accurate measurement of the J-integral is examined with the use of elastic-plastic finite element analysis. This minimum pre-crack is shorter than what is specified in fracture codes ASTM E1820 and BS 7448. A variety of steel properties are considered, but the focus is on S690 grade steel. Testing a...conference paper 2013
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van der Wal, R. (author), Rahm, M. (author), Hiltz, J. (author), Claesson, A. (author), Boonacker, B. (author)Navies have been facing budget reductions over the past decade. Since crew size is a major cost driver, this has led to efforts to reduce manning on board naval ships. Traditionally, damage control and firefighting were manpower intensive operations. To enable crewing level reductions without compromising the ability to deal with damage and...conference paper 2013
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Vredeveldt, A.W. (author), Schipperen, J.H.A. (author), Nassár, Q.H.A. (author), Spaans, C.A. (author)The paper describes how high energy crashworthiness with respect to ship collisions of a jacket can be predicted through explicit finite element analyses. The classical issue of the material models is discussed. In addition the topics of global jacket dynamics and the definition of failure are discussed. The structural arrangement of the jacket...conference paper 2013
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- van der Weijde, G.D. (author), Schipperen, J.H.A. (author) public lecture 2013
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Bronkhorst, A.J. (author), van Uffelen, M. (author), Geurts, C.P.W. (author), Aanen, L. (author), van Bentum, C.A. (author)Pressure measurements were performed on various configurations of two high-rise building models in two atmospheric boundary layer wind tunnels in the Netherlands. A comparison was made of the interference factors of the minimum and maximum peak pressures over all pressure taps at 0 degree angle of incidence obtained for measurements on the...conference paper 2013
Searched for: subject%3A%22SD%255C%2B%255C-%255C%2BStructural%255C%2BDynamics%22
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