PSI - Issue 11

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) 339–346 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 Shear modulus of masonry walls: a critical review Pietro Croce a *, Maria Luisa Beconcini a , Paolo Formichi a , Paolo Cioni a , Filippo Landi a,b , Caterina Mochi a , Francesco De Lellis a , Elisabetta Mariotti a , Isabell Serra 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, Mühlenpfordtstrasse 23, D-38106 Braunschweig, Germany In the assessment of seismic performance of masonry buildings, the proper definition of mechanical parameters of masonry, the shear modulus in particular, is a critical issue. Moreover, conside ing that existing buil ings are characterized by several masonry types, depending on the material as well as on the texture, mechanical parameters can vary in a very wide range, also because they depend on many other parameters and in particular on the integrity of the walls and on the stress level. Although the in situ or laboratory experimental evaluation of the G modulus has been the subject of a wide literature concerning flat jacks, diagonal and single compression and shear-compression test results, its outcomes are often contradictory. In effect, values given by different studies often differ significantly, even for the same class of masonry. Since the intrinsic scattering of the parameter is not sufficient by itself to justify the huge variability of the results, a critical discussion of the results as well as of the individual test arrangements is necessary to make the background more reliable, also in view of better addressing further studies A huge database has been setup combining masonry test results available in the relevant scientific literature with the test results obtained in the framework of the in situ experimental campaign carried out by the authors for the assessment of seismic vulnerability of masonry school buildings in the Municipality of Florence. The analysis of the database underlines that values of the shear modulus G , which is fundamental parameter for the efinition of capacity curve for walls commonly u ed in non lin ar static analysis, are extrem ly scat ered. Testing methodology and arrangem nt are discussed an a possible procedure is pr posed to arrive to sounde estimations of relevant mechanical parameter of existing building masonry. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Shear modulus of masonry walls: a critical review Pietro Croce a *, Maria Luisa Beconcini a , Paolo Formichi a , Paolo Cioni a , Filippo Landi a,b , Caterina Mochi a , Francesco De Lellis a , Elisabetta Mariotti a , Isabelle Serra 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 the assessm nt of seismic performa ce of masonry buildings, the pr per d finition of mechanical parameters of masonry, the shear modulus i particular, is a critic l issue. Moreover, considerin that xisting buildings are characterized by sever l masonry types, depending on the material as well as on the texture, mechanical parameters can vary in a very wide rang , also because they depend on ma y other par meters and in particular on the integrity of the walls d on the stress level. Although the in situ or laboratory experimental evaluation of the G mod lus has bee the subject of wide literature concerning flat jacks, diagonal and single com ressio and shear-compression test results, its outcomes are often contradictory. In effect, values given by differe t studies often differ significantly, even for the same class of masonry. Since the intrinsic scattering of the parameter is not sufficient by its lf to justify the huge variability of the results, a critical discussion of the results s well as of the individual test arrang ments is necessary to make the background more reliable, also in view of better addr ssing further studies A huge database has be n setup combining masonry test results available in the relevant scientific literature with the test results obtain d in the fr mew rk of the in situ experimental campaign carried out by the authors for the assessment of seismic vulnerability of masonry sch ol buildings i the Municipality of Florenc . Th a alysis of t e database underlines that values f the shear modulus G , whi i a fundamental parameter for the definition of capacity urve for w lls common y used in non linear static analysis, are extremely sc ttered. Testing methodol gy d arrang ment are discussed and a possible procedur is proposed to arrive to sounder stimations of relevant mechanical param ter of existing building masonry. 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 responsi ility of the CINPAR 2018 organizers Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: Seismic vulnerability; Masonry buildings; Seismic resistance; 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

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216 Copyright  2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 10.1016/j.prostr.2018.11.044