Search results for "hake"
showing 10 items of 220 documents
Computational procedures for plastic shakedown design of structures
2004
The minimum volume design problem of elastic perfectly plastic finite element structures subjected to a combination of fixed and perfect cyclic loads is studied. The design problem is formulated in such a way that incremental collapse is certainly prevented. The search for the structural design with the required limit behaviour is effected following two different formulations, both developed on the grounds of a statical approach: the first one operates below the elastic shakedown limit and is able to provide a suboptimal design; the second one operates above the elastic shakedown limit and is able to provide the/an optimal design. The Kuhn–Tucker conditions of the two problems provide usefu…
Bounds on plastic strains for elastic plastic structures in plastic shakedown conditions
2007
The problem related to the computation of bounds on plastic deformations for structures in plastic shakedown condition (alternating plasticity) is studied. In particular, reference is made to structures discretized by finite elements constituted by elastic perfectly plastic material and subjected to a special combination of fixed and cyclic loads. The load history is known during the steady-state phase, but it is unknown during the previous transient phase; so, as a consequence, it is not possible to know the complete elastic plastic structural response. The interest is therefore focused on the computation of bounds on suitable measures of the plastic strain which characterizes just the fir…
Risk Assessment of Hand-Arm Vibration in Different Types of Portable Shakers for Olives Harvesting
2010
"Mens sana in corpore sano": The Rhetoric of the Body in Shakespeare’s Roman and Late Plays
2010
Dynamic shakedown design of structures under repeated seismic loads
2013
The paper is devoted to the formulation of an optimal design (minimum volume) problem of elastic perfectly plastic structures subjected to suitable combinations of static (fixed) and dynamic (seismic) loads. The structure is constrained to simultaneously respect two different safety criteria; actually, it must exhibit an elastic shakedown behaviour for the combination of loads characterizing the serviceability conditions and it must prevent the instantaneous collapse for the highest expected load condition (combination of loads characterized by the presence of fixed loads and maximum expected intensity of seismic action). The shakedown limit behaviour for the optimal structure will be impos…
Comparison between unrestricted dynamic shakedown design and a new probabilistic approach for structures under seismic loadings
2014
The paper concerns a study related to the comparison between two different approaches utilized for the formulation of an optimal shakedown design problem for elastic plastic frame structures subjected to a combination of fixed and seismic loading. The first formulation utilizes the unrestricted dynamic shakedown theory, while the second one is based on a new probabilistic approach. The comparison is effected in terms of mathematical formulations, in terms of adopted loading models and in terms of numerical results. The performed applications are related to plane steel frames.
Probabilistic Evaluation of the Adaptation Time for Structures under Seismic Loads
2016
Abstract In this paper, a probabilistic approach for the evaluation of the adaptation time for elastic perfectly plastic frames is proposed. The considered load history acting on the structure is defined as a suitable combination of quasi-statical loads and seismic actions. The proposed approach utilizes the Monte Carlo method in order to generate a suitable large number of seismic acceleration histories and for each one the related load combination is defined. Furthermore, for each load combination the related adaptation time is determined, if any, as the optimal one for which the structure is able to shakedown under the unamplified applied actions. A known generalized Ceradini's theorem i…
Forgetful Audiences in Julius Caesar
2012
On note dans Jules César une récurrence d'épisodes où la mémoire du spectateur défaille, quand des personnages oublient une scène à laquelle ils viennent d'assister ou la retiennent de façon approximative. Cet article s'intéresse aux manifestations dramatiques et méta-théâtrales de ce phénomène, et avance que ces scènes d'oubli sont pour l'auteur le moyen de démontrer le caractère fuyant de la mémoire empirique et de proposer que le théâtre, plutôt que la salle de classe, constitue un terrain propice à l'exercice de cette mémoire. Julius Caesar exhibits a pattern of audience forgetfulness, when characters forget scenes they have just witnessed, or when they remember them imperfectly. This p…
A Midsummer Night's Dream - Untako vai unelmaa? : Paavo Cajanderin ja Lauri Siparin Shakespeare-suomennosten vertailua
2003
"The toenails on the other hand never grow at all" : the functions of wordplay in Tom Stoppard’s play Rosencrantz and Guildenstern Are Dead
2015
Huumori on hyvin yleisesti käytetty tehokeino niin arkisessa kielenkäytössä kuin populaarikulttuurissa ja kirjallisuudessakin. Yhtenä huumorin lajina voidaan pitää erilaisia sanaleikkejä, joissa leikitellään kielen monitulkintaisuudella. Sanaleikeissä on usein kaksi, tai jopa useampi, merkityksen taso, joiden yhtäaikainen ymmärtäminen johtaa sanaleikin tajuamiseen. Tom Stoppardin vuoden 1966 näytelmä Rosencrantz and Guildenstern Are Dead on tunnettu absurdi komedia, jossa esiintyy reilusti sanaleikkejä, joten se soveltuu erityisen hyvin juuri tämänkaltaisen huumorin tarkasteluun. Tässä näytelmässä Shakespearen Hamletin sivuhenkilöt Rosencrantz ja Guildenstern ovat päähenkilöinä omassa tarin…