447 research outputs found
Fatigue crack growth in thin notched woven glass composites under tensile loading. Part II: modelling
No full textFatigue propagation of a through-the-thickness crack in thin woven glass laminates is difficult to model when using homogeneous material assumption. Crack growth depends on both the fatigue behaviour of the fibres and of the matrix, these two phenomena occurring at different time and space scales. The developed finite element model is based on the architecture of the fabric and on the fatigue behaviours of the matrix and the fibre, even if the pure resin and fibre behaviours are not used. That thus limits the physical meaning of this model. Basically, the objective of this simulation is to illustrate and to confirm proposed crack growth mechanism. The fatigue damage matrix is introduced with user spring elements that link the two fibre directions of the fabric. Fibre fatigue behaviour is based on the S-N curves. Numerical results are compared to experimental crack growth rates and observed damage in the crack tip. Relatively good agreement between predictions and experiments was found
Influence of woven ply degradation on fatigue crack growth in thin notched composites under tensile loading
No full textThis paper deals with the fatigue of the through the-thickness crack propagation in thin notched composite laminates made of two glass woven plies. It highlights the different crack growths between warp and weft directions of the woven ply. Experimental results show a decrease of the crack growth rate per cycle with the increase of the crack initiation time. Moreover, it has been shown that it is necessary to take into account the fatigue damage of the woven plies in term of loss of rigidity in the initiation phase. The fatigue crack growth rates are then quantified using Paris law type equations and linear elastic fracture mechanics (LEFM)
Revue d'Histoire et de Philosophie Religieuses, 2017, t. 97/1 Janvier-Mars 2017
No full textPROTESTANTISME, RELIGION, LATINITÉ, LAÏCITÉ DANS LA MODERNITÉ TARDIVE Hommage à Jean-Pierre Bastian à l’occasion de son soixante-dixième anniversaire Introduction, par Matthieu ARNOLD et Christian GRAPPE, p.3 Yves BIZEUL, La gestion locale de la diversité religieuse en Allemagne. Un mode protestant de régulation des conflits ?, p. 5 Roland CAMPICHE, Éduquez ! Un impératif constitutif du protestantisme ?, p. 23 Fortunato MALLIMACI, Apprendre à décentrer le regard sur la modernité religieuse, p..
Fatigue crack growth in thin notched woven glass composites under tensile loading. Part I: experimental
No full textHelicopter blades are made of composite materials mainly loaded in fatigue and have normally relatively thin skins. A through-the-thickness crack could appear in these skins. The aim of this study is to characterize the through-the-thickness crack propagation due to fatigue in thin woven glass fabric laminates. A technological test specimen is developed to get closer to the real loading conditions acting on these structures. An experimental campaign is undertaken which allows evaluating crack growth rates in several laminates. The crack path is linked through microscopic investigations to specify damage in woven plies. Crack initiation duration influence on experimental results is also underlined
Study of the fatigue crack growth in thin composite skins made of woven plies
No full textHelicopter blades are made of composite sandwich materials mainly loaded in fatigue. Normally, they have relatively thin skins. A through-the-thickness crack could appear in these coatings. The aim of this study is to characterize the through-the-thickness crack propagation in fatigue in thin woven glass fabric laminates. A specific fatigue test is developed so that these structures parts can undergo real stress conditions. A wide experimental campaign is undertaken which allows stating crack growth rates in several laminates. The propagation path is linked through microscopic investigations to specific damages of woven plies. Crack initiation duration influence on experimental results is also underlined. The finite element modelling is based on the architecture of the fabric and on the fatigue behaviours of the matrix and the fibre. The fatigue damage matrix is introduced with user spring elements that link the two fibres directions of the fabric. The glass fibre fatigue behaviour is based on S-N curves. Numerical results are compared to measured crack growth rates levels and observed damages in the crack tip
What Did Matthieu Beroald Transmit to François Béroalde de Verville?
No full text Many tangible and intangible goods were passed down within early modern families. The goods included texts and the knowledge that texts communicated. But how did they relate to the other goods transmitted within families? That question is explored in relation to the scholar Matthieu Beroald and his son François Béroalde de Verville, author of the famous Moyen de parvenir. Matthieu transmitted to François a humanist education, at least one printed volume (probably more), an interest in certain topics (especially chronology), a network of contacts, but little wealth. And François soon donated to his sisters what wealth he did receive. His relationship to his intellectual inheritance from his father was complex and ambivalent. Aspects of François's attitude towards knowledge may have stemmed, via his father, from two grandfather-figures: Matthieu's own father (a barber-surgeon) and Matthieu's relative and benefactor François Vatable (the Hebraicist). </jats:p
Social protection
No full textThis chapter analyses models of social protection. The author (Matthieu Clément) first discusses several recent programmes and proceeds by implementing Esping-Andersen’s analytical framework accounting for the plurality of social protection logics and actors. He finds that the two main dimensions that help differentiate social protection types across countries are the extent of decommodification and the extent of informal social protection. Four models of social protection are identified. Although China, India or Brazil, together with Latin American reformers, all fall into the USA-like liberal type, the other emerging countries fall into the social insecurity model, with migrant remittances playing a key role in bolstering family income in the country of origin. The last two models, which are specific to developing economies, are described in detail
L'Ouvrage incomplet sur Matthieu (Opus imperfectum in Matthaeum) et les commentaires en latin sur l'évangile de Matthieu de l'Antiquité. Comparaison exégétique et stylistique ciblée sur la partie A (Mt 1-8)
No full textAs part of the critical edition project of the Incomplete Work on Matthew (Opus imperfectum in Matthaeum, OIM), the present thesis analyzes the links between this anonymous commentary on the Gospel of Matthew, coming from a Riminian subordinationist environment (i.e. “Homean”), and other Latin exegetical works on the same gospel. After recalling, in a state of research, the main characteristics of the corpus taken into account, we carried out a continued exegetical comparison relating to the section Mt 1-8, corresponding to the first part of the OIM, with the fragments remains of the commentary on Matthew by Origen (3rd century), the commentaries on Matthew by Fortunatian of Aquileia and Hilary of Poitiers (mid-4th century), those of Jerome and Chromatius of Aquileia (late 4th century), and the texts by an anonymous Latin author from late Antiquity known as pseudo-Origen. This study was accompanied by a stylistic comparison on certain aspects (appellations of Christ, exegetical vocabulary, personal marks), highlighting the profound originality of the OIM in this regard. The results of this double comparison confirm the deep link of the OIM with Origen's Commentary on Matthew, an influence that the anonymous author shares with Jerome. Furthermore, our study shows for the first time the use in the OIM of the Commentary on Matthew by Chromatius of Aquileia. Finally, the results of the stylistic comparison, accompanied by a theological analysis of the translator's positions, tend to confirm that it is indeed to the author of the OIM that we owe the ancient Latin translation of the Commentary on Matthew of Origen.S'inscrivant dans le projet d'édition critique de l'Ouvrage incomplet sur Matthieu (Opus imperfectum in Matthaeum, OIM), la présente thèse analyse les liens entre ce commentaire anonyme sur l'évangile de Matthieu, provenant d'un milieu subordinationiste riminien (i.e. « homéen »), et d'autres ouvrages exégétiques latins sur le même évangile. Après avoir rappelé, dans un état de la recherche, les principales caractéristiques du corpus pris en compte, nous avons procédé à une comparaison exégétique suivie portant sur la section Mt 1-8, correspondant à la première partie de l'OIM, avec les commentaires sur Matthieu de Fortunatien d'Aquilée et d'Hilaire de Poitiers (milieu IVe siècle), ceux de Jérôme et Chromace d'Aquilée (fin IVe siècle), et les textes d'un auteur latin anonyme de la fin de l'Antiquité surnommé le pseudo-Origène. Cette étude s'est doublée d'une comparaison stylistique sur quelques aspects (appellations du Christ, vocabulaire exégétique, marques de personne), faisant ressortir la profonde originalité de l'OIM à cet égard. Le bilan de cette double comparaison confirme l'influence profonde du Commentaire sur Matthieu d'Origène sur l'OIM, ce qui rapproche l'auteur anonyme de Jérôme. De plus, notre étude met en évidence pour la première fois son utilisation du Commentaire sur Matthieu de Chromace d'Aquilée. Enfin, les résultats de la comparaison stylistique, assortis d'une analyse théologique des positions du traducteur, tendent à confirmer que c'est bien à l'auteur de l'OIM que nous devons l'ancienne traduction latine du Commentaire sur Matthieu d'Origène
How Autistic Brains Grow Differently: Hippocampal Neurogenesis in the 16p11.2 Heterozygous Mouse, a Model of Non-syndromic Autism
No full textThis work was produced while the author was an undergraduate student in the Summer Research Institute of the Ronald E. McNair Post Baccalaureate Degree Achievement Program at Rutgers University
Van last naar les: Hoe publiek-private samenwerking de regenwateroverlast voor inwoners, woningeigenaren en klanten kan verlagen. Een analyse van schadegegevens en de factoren die van invloed zijn op regenwaterschade
No full textIn het Impactproject ‘Samen met verzekeraars naar een regenbestendige stad’ hebben we de werelden van een verzekeraar, onderzoeker en gemeente/waterbeheerder bij elkaar gebracht. Amsterdam Rainproof, Waternet, Achmea en TU Delft zijn de samenwerking aangegaan om de impact van extreme regenval op bewoners in Amsterdam te analyseren en te verkennen hoe hierop te anticiperen om zo de waterschade te verminderen en het woongenot te vergroten. Het vertrekpunt van het Impactproject is de wateroverlast en schade die inwoners van Amsterdam, waaronder de klanten van Achmea, ondervonden als gevolg van extreme regenval. We willen hierbij in eerste instantie de manieren inzichtelijk maken waarop eigenaren van woningen, huurders, verzekeraars en Waternet alleen en in samenhang met elkaar kunnen anticiperen op een wolkbreuk om waterschade te verminderen. In tweede instantie willen we de werkwijze verbeteren waarmee betrokken organisaties informatie over schade inwinnen en delen. We hebben de schade van de wolkbreuk van 28 juli 2014 onderzocht door middel van een analyse van bestaande verzekeringsdata van Achmea verrijkt met andere openbare data, en meldingen van wateroverlast bij Waternet, de gemeente Amsterdam en de Brandweer. Daarnaast hebben we door middel van een bewonersenquête in Oud-Zuid en Oud-West gekeken naar de factoren die bijdragen aan waterschade en naar de werkelijk ervaren schade. Deze onderzoeken geven een beeld van de wateroverlast en schade die optreedt tijdens en na een wolkbreuk, en inzicht in de effectieve voorzorgsmaatregelen die genomen kunnen worden om schade te verminderen. Om de persoonsgegevens van alle betrokken bewoners in het onderzoeksgebied te beschermen hebben we gezorgd dat bij de aanpak van de onderzoeken informatie van verschillende bronnen (verzekeringsdata, meldingen bij Waternet) niet te combineren is op adresniveau, maar slechts op 6-cijferig postcode niveau. Individuele resultaten van de bewoners enquête heeft de TU Delft niet onderling gedeeld met Waternet en Achmea. In dit rapport zijn alleen geaggregeerde resultaten van de bewonersenquête terug te vinden; zonder verwijzing naar een individueel adres of persoon
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