@inproceedings{StaatHeitzer2002, author = {Staat, Manfred and Heitzer, Michael}, title = {The restricted influence of kinematic hardening on shakedown loads}, year = {2002}, abstract = {Structural design analyses are conducted with the aim of verifying the exclusion of ratcheting. To this end it is important to make a clear distinction between the shakedown range and the ratcheting range. In cyclic plasticity more sophisticated hardening models have been suggested in order to model the strain evolution observed in ratcheting experiments. The hardening models used in shakedown analysis are comparatively simple. It is shown that shakedown analysis can make quite stable predictions of admissible load ranges despite the simplicity of the underlying hardening models. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis. Both give identical or similar shakedown ranges. Structural shakedown analyses show that the loading may have a more pronounced effect than the hardening model.}, subject = {Biomedizinische Technik}, language = {en} } @inproceedings{StaatHeitzer2000, author = {Staat, Manfred and Heitzer, Michael}, title = {Direct static FEM approach to limit and shakedown analysis}, year = {2000}, abstract = {Safety and reliability of structures may be assessed indirectly by stress distributions. Limit and shakedown theorems are simplified but exact methods of plasticity that provide safety factors directly in the loading space. These theorems may be used for a direct definition of the limit state function for failure by plastic collapse or by inadaptation. In a FEM formulation the limit state function is obtained from a nonlinear optimization problem. This direct approach reduces considerably the necessary knowledge of uncertain technological input data, the computing time, and the numerical error. Moreover, the direct way leads to highly effective and precise reliability analyses. The theorems are implemented into a general purpose FEM program in a way capable of large-scale analysis.}, subject = {Einspielen }, language = {en} } @inproceedings{Schermutzki2004, author = {Schermutzki, Margret}, title = {ECTS, Workload, Credits, Module ... : Neue Studienstrukturen in Europa}, year = {2004}, abstract = {Informationen zur Einf{\"u}hrung von ECTS zur europ{\"a}isch einheitlichen Bewertung von Studienleistungen Basierung der ECTS auf der tats{\"a}chlichen Arbeitsbelastung der Studierenden M{\"o}glichkeiten zur Ermittlung der Arbeitsbelastung}, subject = {Bologna-Prozess}, language = {de} } @inproceedings{Schermutzki2005, author = {Schermutzki, Margret}, title = {Zur Bedeutung der Workload}, year = {2005}, abstract = {Informationen zur Einf{\"u}hrung von ECTS zur europ{\"a}isch einheitlichen Bewertung von Studienleistungen Basierung der ECTS auf der tats{\"a}chlichen Arbeitsbelastung der Studierenden M{\"o}glichkeiten zur Ermittlung der Arbeitsbelastung}, subject = {Bologna-Prozess}, language = {de} } @inproceedings{Staat2003, author = {Staat, Manfred}, title = {Design by Analysis of Pressure Components by non-linear Optimization}, year = {2003}, abstract = {This paper presents the direct route to Design by Analysis (DBA) of the new European pressure vessel standard in the language of limit and shakedown analysis (LISA). This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for some examples from the DBA-Manual. One observation from the examples is, that the optimisation approach gives reliable and close lower bound solutions leading to simple and optimised design decision.}, language = {en} } @inproceedings{Fabo2004, author = {Fabo, Sabine}, title = {Audio-visual hybrids : between immersion and detachment}, year = {2004}, abstract = {Close interrelations between sound and image are not a mere phenomenon of today's multimedia technology. The idea of the synthesis of different media lies at the core of the concept of the Gesamtkunstwerk in the second half of the 19th century and it can also be traced back to the synaesthesia debate at the beginning of the 20th century [...].}, subject = {Elektronische Kunst}, language = {en} } @inproceedings{MertenKaemperBrilletal.2003, author = {Merten, Sabine and K{\"a}mper, Klaus-Peter and Brill, Manfred and Picard, Antoni and Cassel, Detlev and Jentsch, Andreas and Rollwa, Markus}, title = {Virtuelle Sensor-Fertigung: Hightech mit LabVIEW}, year = {2003}, abstract = {Eine neue Generation von Praktika an Hochschulen w{\"a}chst heran. Moderne Wege beim Verstehen und Erlernen naturwissenschaftlicher Zusammenh{\"a}nge sowie industrieller Fertigungsprozesse sind gefordert. Das Technologiepraktikum „Virtuelle Sensor- Fertigung", entwickelt im Verbundprojekt INGMEDIA an den Fachhochschulen Aachen und Zweibr{\"u}cken, tr{\"a}gt als neuartiges Lern- und Lehrmodul dieser Forderung Rechnung. Die Studierenden lernen einen vollst{\"a}ndigen Fertigungsprozess mit Hilfe von virtuellen, in LabVIEW programmierten Maschinen kennen, bevor sie die reale Prozesskette im Reinraum durchf{\"u}hren.}, subject = {LabVIEW}, language = {de} } @inproceedings{MertenKaemperBrilletal.2003, author = {Merten, Sabine and K{\"a}mper, Klaus-Peter and Brill, Manfred and Picard, Antoni and Cassel, Detlev and Jentsch, Andreas and Rollwa, Markus}, title = {Vom virtuellen Wafer zum realen Drucksensor}, year = {2003}, abstract = {Das Technologiepraktikum „Virtuelle Sensor-Fertigung" ist ein Beispiel f{\"u}r die medientechnische Aufbereitung von Lern- und Lehrmaterial unter didaktischen Gesichtspunkten. Studierende lernen einen Fertigungsprozess mit Hilfe von virtuellen Maschinen kennen, bevor sie die reale Prozesskette im Laborpraktikum im Reinraum durchf{\"u}hren.}, subject = {Virtuelle Maschine}, language = {de} } @inproceedings{SurteesGillespieKernetal.2004, author = {Surtees, A. J. and Gillespie, A. and Kern, Alexander and Rousseau, A.}, title = {DEVELOPMENT OF A RISK ASSESSMENT CALCULATOR BASED ON A SIMPLIFIED FORM OF THE IEC 62305-2 STANDARD ON LIGHTNING PROTECTION}, year = {2004}, abstract = {Neue Blitzschutznorm IEC 62305. Entwicklung einer einfachen Software zur Risikoabw{\"a}gung}, language = {en} } @inproceedings{KernHeidlerSeeversetal.2004, author = {Kern, Alexander and Heidler, Fridolin and Seevers, M. and Zischank, Wolfgang J.}, title = {Magnetic Fields and Induced Voltages in case of a Direct Strike - Comparison of Results obtained from Measurements at a Scaled Building to those of IEC 62305-4}, isbn = {0304-3886}, year = {2004}, abstract = {In the paper the results obtained from experiments at a modelled reinforced building in case of a direct lightning strike are compared with calculations. The comparison includes peak values of the magnetic field Hmax, its derivative (dH/dt)max and of induced voltages umax in typical cable routings. The experiments are performed at a 1:6 scaled building and the results are extrapolated using the similarity relations theory. The calculations are based on the approximate formulae given in IEC 62305-4 and have to be supplemented by a rough estimation of the additional shielding effect of a second reinforcement layer. The comparison shows, that the measured peak values of the magnetic field and its derivative are mostly lower than the calculated. The induced voltages are in good agreement. Hence, calculations of the induced voltages based on IEC 62305-4 are a good method for lightning protection studies of buildings, where the reinforcement is used as a grid-like electromagnetic shield.}, subject = {Blitz}, language = {en} }