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See detailDesign of thermoresponsive inorganic nanoparticles
Aqil, Abdelhafid ULg; Jérôme, Christine ULg

Conference (2008, November 28)

Detailed reference viewed: 42 (7 ULg)
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See detailDesign of thermoresponsive magnetic nanoparticles for hyperthermia
Sibret, Pierre ULg; Aqil, Abdelhafid; Jérôme, Christine ULg

Poster (2009, June 14)

Detailed reference viewed: 12 (0 ULg)
Peer Reviewed
See detailDesign of treatment strategies for an atrophic nonunion case in fracture healing
Geris, Liesbet ULg; Vander Sloten, Jos; Van Oosterwyck, Hans

in proceedings of the IVth International Conference on Computational Bioengineering (2009)

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See detailDesign of Tubular Steel Sections. Training and Education for the Implementation of Eurocode 3
Boissonnade, Nicolas; Fleischer, Oliver; Franssen, Jean-Marc ULg et al

Learning material (2009)

Both steel and concrete suffer a progressive reduction in both strength and stiffness as their temperature increases in fire conditions. Eurocode 3 and Eurocode 4 provide material models for both ... [more ▼]

Both steel and concrete suffer a progressive reduction in both strength and stiffness as their temperature increases in fire conditions. Eurocode 3 and Eurocode 4 provide material models for both materials over an extensive range of temperatures; Fire resistance of structural elements is quoted as the time at which they cannot maintain their load bearing capacity; It is possible to assess the severity of a natural fire for a particular steel element as a time-equivalent between the peak temperature in the steel element and the same temperature in the element submitted to the ISO834 standard curve; The behaviour of separate elements is very different from that of a complete building frame, but the only practical way of assessing whole-structure behaviour is to use advanced calculation models; Traditional fire protection of steelwork is by covering it with insulating material during construction. However it may be possible under Eurocode 3 to use a combination of passive and active strategies to ensure fire resistance; Eurocode 3 calculation of fire resistance takes account of the loading level on the element, with values of the safety factors lower than those used at room temperatures; Fire resistance may be calculated in terms of time, as a load-bearing resistance at a certain time, or as a critical element temperature appropriate to the load level and required time of exposure; Critical temperature is calculated from a single equation in terms of the load level in fire for members of Classes 1, 2 or 3 sections if there is no instability phenomena involved. Class 4 sections are universally assumed to have a critical temperature of 350°C, but higher critical temperatures can be obtained by calculation; Eurocode 3 provides simple calculations for the load resistance in fire of all types of elements. In cases where the strength is controlled by buckling, a buckling curve that is particular for the fire situation has to be used. The slenderness of the element is temperature dependent; It is possible to calculate the temperature growth of protected or unprotected members in small time increments, in a way which can easily be implemented on a spreadsheet. [less ▲]

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See detailDesign of well-defined N-vinylamides based copolymers via organometalllic-mediated radical polymerization
Debuigne, Antoine ULg; Kermagoret, Anthony ULg; Fustin, Charles-André et al

Conference (2013, June 19)

Detailed reference viewed: 29 (9 ULg)
Peer Reviewed
See detailDesign optimization of an electrostatic MEMS actuator with low spring constant for an "Atom Chip"
Rouabah, H; Gollasch, CO; Kraft, Michael ULg

in Proc. NSTI Nanotech (2005)

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See detailDesign optimization of large-size format edge-lit light guide units
Hastanin, Juriy ULg; Lenaerts, Cedric ULg; Fleury-Frenette, Karl ULg

in Proceedings of SPIE; SPIE 2016 Photonics Europe (2016, April)

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the ... [more ▼]

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the maximum allowable number of optical objects supported by most common ray-tracing software. In the proposed method, in order to simplify the computational problem, an original optical system is replaced by an equivalent one. Accordingly, the original dot pattern is splitted into multiple small sections. Then, these sections are replaced by equivalent cells with continuous diffusing film. After that, we adjust the TIS (Total Integrated Scatter) two-dimensional distribution over the grid of equivalent cells, using an iterative optimization procedure. Finally, the obtained optimal TIS distribution is converted into the dot size distribution by applying an appropriate conversion rule. An original semi-empirical equation dedicated to rectangular large-size LGPs (Light Guide Plate) is proposed for the initial guess of the TIS distribution. It allows significantly reducing the time needed to dot pattern optimization. [less ▲]

Detailed reference viewed: 19 (4 ULg)
See detailDesign Organisationnel et métamorphose des organisations
Froehlicher, Thomas ULg; Walliser, Bjorn

Book published by L'Harmattan (2004)

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See detailDesign participatif d'un système de vote électronique
Parotte, Céline ULg; Rossignol, Nicolas ULg

Conference (2011, November 25)

Cette communication présente l'évolution des registres discursifs rencontrés tout au long du processus de design participatif. Ils montrent que le caractère itératif du processus permet la résolution ... [more ▼]

Cette communication présente l'évolution des registres discursifs rencontrés tout au long du processus de design participatif. Ils montrent que le caractère itératif du processus permet la résolution progressive de problèmes identifiés par les acteurs, tout en notant la persistence de blocages concernant certaines implications de la mise en oeuvre d'un système de vote électronique, précisément sur ce que "fait faire" aux acteurs ce nouveau système. [less ▲]

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See detailDesign Procedure of a Nonlinear Vibration Absorber Using Bifurcation Analysis
Viguié, Régis ULg; Kerschen, Gaëtan ULg

in 27th International Modal Analysis Conference, Orlando, 2009 (2009)

A nonlinear energy sink (NES) is characterized by its ability to passively realize targeted energy transfer as well as multimodal damping. This latter feature seems to make this device very well suited ... [more ▼]

A nonlinear energy sink (NES) is characterized by its ability to passively realize targeted energy transfer as well as multimodal damping. This latter feature seems to make this device very well suited for reducing the vibration level of MDOF linear structures. The perspective of dealing with MDOF linear primary structures requires the development of an efficient NES design procedure. This paper poses the basis of such a procedure based upon the bifurcation analysis of a system composed of a linear oscillator coupled to a NES, using the software MatCont. [less ▲]

Detailed reference viewed: 91 (8 ULg)
Peer Reviewed
See detailDesign procedure of a nonlinear vibration absorber using bifurcation analysis : application to the drill-string system
Viguié, Régis ULg; Kerschen, Gaëtan ULg

in ASME International Design Engineering Technical Conferences, San Diego, 2009 (2009)

Detailed reference viewed: 22 (5 ULg)
See detailDesign procedure of a nonlinear vibration absorber using bifurcation analysis: application to a drill-string system
Viguié, Régis ULg; Kerschen, Gaëtan ULg

in Euromech 503, Nonlinear Normal Modes, Dimension Reduction and Localization in Vibrating Systems, Frascati, 2009 (2009)

Detailed reference viewed: 19 (3 ULg)
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See detailDesign procedure of a nonlinear vibration absrober: enhancement of the amplitude robustness
Viguié, R.; Kerschen, Gaëtan ULg

in Proceedings of the International Conference on Noise and Vibration Engineering (2010)

Nonlinear vibration absorbers are known as being frequency-robust but not amplitude-robust devices. This lack of amplitude robustness is due to the frequency-energy dependence of their related nonlinear ... [more ▼]

Nonlinear vibration absorbers are known as being frequency-robust but not amplitude-robust devices. This lack of amplitude robustness is due to the frequency-energy dependence of their related nonlinear oscillations. This feature makes the design of nonlinear vibration absorbers a particulary challenging problem. In this paper an innovative design procedure of a nonlinear vibration absorber is proposed so that a nonlinear mode of a nonlinear primary structure can be controlled in a frequency and amplitude robustness fashion. [less ▲]

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See detailDesign report of the specimens for all the experimental analyses - Deliverable D.4.1 - Robustimpact
Hoffmann, Nadine; Kuhlmann, Ulrike; Huvelle, Clara et al

Report (2016)

The present report focuses on the design of the experimental analysis that are going to be performed within the ROBUSTIMPACT project (Grant Agreement Number: RFSR-CT-2012-00029). The project focuses on ... [more ▼]

The present report focuses on the design of the experimental analysis that are going to be performed within the ROBUSTIMPACT project (Grant Agreement Number: RFSR-CT-2012-00029). The project focuses on the behavior of composite steel and concrete framed buildings against accidental actions. Within the project, several experimental analyses are going to be performed spanning from the local to the global behavior. The report is divided in 4 parts, each one describing the preliminary work of each partner of the project. In particular:  Part A reports the work performed by USTUTT (University of Stuttgart) including the design of four experimental tests on composite joints and two experimental tests on composite frames. In particular, the composite joints will be investigated in order to better understand the behavior in terms of activation of catenary actions. The tests on composite frames are performed investigating the influence of the high speed loading and strain rate effects on the deformation capacity of these structures.  Part B reports the work performed by ULg (University of Liege) including the design of 44 experimental impact tests on beam-to-column joints and column base joints. With these tests will be possible to investigate the response of different joint components under impact loading for different level of energy.  Part C reports the work performed by UTRE (Università degli Studi di Trento) including the design of the case study reference structures and the design of the experimental tests. In particular, two 3D full scale tests will be performed by simulating to total loss of the impacted column in order to investigate the redundancy of the 3D slab system in terms of activation of membrane effects.  Part D reports the work performed by RWTH (University of Aachen) including the design of six crash tests on columns that are going to be performed in order to investigate the residual strength of the damaged member after the impact. The aim is to determine the response of the member during the impact as well as the dynamic interaction of the member with the surrounding structure. [less ▲]

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See detailDesign Sensitivity Analysis for Shape Optimization of Nonlinear Magnetostatic Systems
Kuci, Erin ULg; Henrotte, François; Duysinx, Pierre ULg et al

in IEEE Transactions on Magnetics (2016), 52(3),

The paper discusses the sensitivity analysis for the shape optimization of a nonlinear magnetostatic system, evaluated both by direct and adjoint approaches. The calculations rely on the Lie derivative ... [more ▼]

The paper discusses the sensitivity analysis for the shape optimization of a nonlinear magnetostatic system, evaluated both by direct and adjoint approaches. The calculations rely on the Lie derivative concept of differential geometry where the flow is the velocity field associated with the modification of a geometrical parameter in the model. The resulting sensitivity formulas can be expressed naturally in a finite element setting through a volume integral in the layer of elements connected to the surface undergoing shape modification. The accuracy of the methodology is analyzed on a 2D model of an interior permanent magnet motor (IPM), and on a 3D model of a permanent magnet system. [less ▲]

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See detailDesign Sensitivity Analysis for Shape Optimization of Nonlinear Magnetostatic Systems
Kuci, Erin ULg; Duysinx, Pierre ULg; Dular, Patrick ULg et al

in Proceedings of COMPUMAG 2015 (2015, June)

In this paper, a direct and an adjoint analytic sensitivity analysis for a nonlinear magnetostatic system is obtained, in the context of shape optimization for any design function. The calculations are ... [more ▼]

In this paper, a direct and an adjoint analytic sensitivity analysis for a nonlinear magnetostatic system is obtained, in the context of shape optimization for any design function. The calculations are based on the material derivative concept of continuum mechanics. The resulting sensitivity formula can be expressed as either a volume integral or as a boundary integral along the interface where shape modification occurs. A method for the calculation of the design velocity field and mesh updating scheme is introduced as well. The accuracy of the methodology is analysed on an inductor system, suggesting that the volume integration technique should be preferred. All methods are freely available for further testing in the open source environment GetDP/Gmsh. [less ▲]

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See detailDesign Space and desirability index. A Bayesian predictive risk-based approach to flexibly achieve multi-criteria decision methods.
Lebrun, Pierre ULg; Boulanger, Bruno; Hubert, Philippe ULg et al

Conference (2011, March 02)

The Design Space (DS) is defined as the set of factors settings (input conditions) that will provide results at least better than pre-defined acceptance limits. The proposed methodology aims at ... [more ▼]

The Design Space (DS) is defined as the set of factors settings (input conditions) that will provide results at least better than pre-defined acceptance limits. The proposed methodology aims at identifying a region in the space of factors that will likely provide satisfactory results during the future use of an analytical method or process in routine, through an optimization process. In a Bayesian framework, the responses are modelled using a multivariate multiple regression model allowing deriving their joint predictive posterior distribution. On the basis of this consequent distribution, a multi-criteria risk-based decision is taken with respect to the pre-defined acceptance limits. This aims to identify the DS. In this context, desirability methodologies are also applied to take the risk-based decision in a more flexible way. An example based on high-performance liquid chromatography illustrates the applicability of the methodology with highly correlated and constrained responses. [less ▲]

Detailed reference viewed: 68 (18 ULg)