PSI - Issue 11

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ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 11 (2018) 331–338 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

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XV Portuguese Conference on Fracture, PCF 2016, 10-12 February 2016, Paço de Arcos, Portugal Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine P. Brandão a , V. Infante b , A.M. Deus c * a Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal b IDMEC, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal c CeFEMA, Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts to undergo different types of time-dependent degradation, one of which is creep. A model using the finite element method (FEM) was developed, in order to be able to predict the creep behaviour of HPT blades. Flight data records (FDR) for a specific aircraft, provided by a commercial aviation company, were used to obtain thermal and mechanical data for three different flight cycles. In order to create the 3D model needed for the FEM analysis, a HPT blade scrap was scanned, and its chemical composition and material properties were obtained. The data that was gathered was fed into the FEM model and different simulations were run, first with a simplified 3D rectangular block shape, in order to better establish the model, and then with the real 3D mesh obtained from the blade scrap. The overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade. Therefore such a model can be useful in the goal of predicting turbine blade life, given a set of FDR data. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Influence of mechanical parameters on non-linear static analysis of masonry buildings: a relevant case-study Pietro Croce a *, Maria Luisa Beconcini a , Paolo Formichi a , Paolo Cioni a , Filippo Landi a,b , Caterina Mochi a , Riccardo Giur a a Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56123, Italy b Institute of Scientific Computing, TU Braunschweig, Mühle pfordtstrasse 23, -38106 Braunschweig, Germany In seismic zones, suitable procedures to assess the seismic vulnerability of existing buildings are necessary also in view of optimal planning of interventions. Starting from the agreement between the Municipality of Florence and the Department of Civil and Industrial Engineering of the University of Pisa, a research program is ongoing, devoted to setup a simplified, fast but reliable procedure for the evaluation of seismic performance of masonry buildings. In this paper, a simplified non-linear pushover type method for the verification of unreinforced multi-story masonry buildings with both deformable and non-deformable slabs is presented, starting from some of the basic assumptions of the POR method. Various tests on the procedure show that the method is able to give results that are comparable with those obtained by the classical pushover analysis performed on equivalent frame models. The intuitiveness of the method and the low computational effort required by the new algorithm allow the evaluation of the sensitivity of non-linear static analysis regarding the definition of mechanical parameters. In particular, the relevant influence of the modulus of elasticity as well as the ultimate inter-story displacement assumed for masonry walls on the assessment of seismic performance are discussed in detail. The results are presented for a significant case study, the Primary School “G. Carducci” in Florence, a four-story masonry building, with a horseshoe layout where lateral appendixes detached from the central block. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Influence of mechanical parameters on non-linear static analysis of masonry buildings: a relevant case-study Pietro Croce a *, Maria Luisa Beconcini a , Paolo Formichi a , Paolo Cioni a , Filippo Landi a,b , Caterina Mochi a , Riccardo Giuri a a Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56123, Italy b Institute of Scientif c Computing, TU Braunschweig, Mühlenp ordtstrasse 23, D-38106 Braunschweig, Germ n Abstract In seismic zon s, suitable procedures to assess the seismic vulnerability of existing bu ldings are ne ess ry also in view f optimal planning of interventi ns. Starting from the agree ent between the Municipality of Florence a d the Dep rtme t of Civil and Industrial Engineering of the University of Pisa, a research program is ongoing, devoted to setup a simplified, fast but reliable procedure for the evaluation of s ismic performanc of masonry buildings. In this paper, a simplifi d non-linear pushover type ethod for the verification of unreinforced multi-story masonry buildings with both deformable an non-deformable slabs is presented, starting from some of the basic assumptions of the POR method. Various tests on the procedure sh w that the method is able to give results that are comparable with those obtained by the classical pushover analysis performed on equival nt frame models. The intuitiveness of the method and t e low computational effort required by the new algorith all w the evaluation of the sensitivity of non-linear static analysis regarding the definition of mechanical parameters. In particular, the relevant influence of the modulus of elasticity as well as the ultimate inter-story displacement ssumed for masonry walls on th assessment of seismic performance are discussed in detail. The results are presented for a significant case study, the Primary School “G. Carducci” in Florence, a four-story masonry building, with a hors shoe lay ut where lateral ppen ixes detached from the central block. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywo ds: S ismic vuln rability; Masonry buildings; Seismic resis ance; Seismic risk index; Pushover methods. Abstract

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Keywords: Seismic vulnerability; Masonry buildings; Seismic resistance; Seismic risk index; Pushover methods.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-revi w u er responsibility of the CINPAR 2018 organizers. 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINP R 2018 organizers. * Corresponding author. Tel.: +39-050-2218-206; fax: +39-050-2218-201. E-mail address: p.croce@ing.unipi.it * Corresponding author. Tel.: +39-050-2218-206; fax: +39-050-2218-201. E-mail ad ress: p.croce@ing.unipi.it

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