PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1057–1064 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.co i ir t Structural Integrity Procedia 00 (2017) 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal 45 years of cable-stayed SNP Bridge in Bratislava Ivan Ba áž a * , Yvona Koleková b a Department of Metal and Timber Structures, b Department of Structural Mechanics, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 11, Bratislava, SK-81005, Slovak Republic Design, description and experience with 45 years old cable-stayed SNP Bridge over the river Danube in Bratislava, Slovak Republic. Imperfection measurements, i spections, calculation of rating factors and evaluation f load-carrying capacities, proposal for exception, strengthening and its influence. Local and global buckling combined with shear lag effects. Influence of torsion at box girders. Development of cable-stayed bridges and position of the SNP Bridge in the world rankings of the large span cable stayed bridges after 45 years from it opening. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Cable-stayed bridge; imperfection measurement; inspections; load-carrying capacities; strenghtening 1. Introduction When it was constructed in 1969, the SNP Bridge, with main span 303 m, was the world record holder in the category of cable-stayed bridges. The bridge was the fourth-longest cable-stayed bridge span when it was opened to traffic on August 29, 1972. It was the winner of the competition Structure of the Twentieth Century in Slovakia, organized in 2001. The original name of the bridge was Slovak National Uprising Bridge (In Slovak: Most Slovenského Národného Povstania = SNP). It was renamed, like other Bratislava Danube bridges, after the collapse of the communist regime in the beginning of the 1990s. The name “New Bridge” was valid only in the period 1993– 2012. Before and after this p rio the name s SNP Bridge. Today the NP bridge, 45 years from its opening, is with the main span 303 m on the 4 th place in the category of cable-stayed bridges with single tower and single cable plane 2nd International onference on Structural Integrity, I SI 2017, 4-7 Septe ber 2017, Funchal, adeira, Portugal rs f l -st ri i r tisl Ivan aláž a * , vona oleková b a Department of Metal and Timber Structures, b Department of Structural Mechanics, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 11, Bratislava, SK-81005, Slovak Republic Abstract Design, description and experience with 45 years old cable-stayed SNP Bridge over the river Danube in Bratislava, Slovak Republic. Imperfection measurements, i spections, calculation of rating factors and evaluation of load-carrying capacities, proposal for exception, strengthening and its influence. Local and global buckling combined with shear lag effects. Influence of torsion at box girders. Development of cable-stayed bridges and position of the SNP Bridge in the world rankings of the large span cable stayed bridges after 45 years from it opening. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Cable-stayed bridge; imperfection measurement; inspections; load-carrying capacities; strenghtening 1. Introduction hen it as constructed in 1969, the S P Bridge, ith ain span 303 , as the orld record holder in the category of cable-stayed bridges. The bridge as the fourth-longest cable-stayed bridge span hen it as opened to traffic on ugust 29, 1972. It as the inner of the co petition Structure of the T entieth Century in Slovakia, organized in 2001. The original na e of the bridge as Slovak ational prising Bridge (In Slovak: ost Slovenského árodného Povstania = S P). It as rena ed, like other Bratislava anube bridges, after the collapse of the co unist regi e in the beginning of the 1990s. The na e “ e Bridge” as valid only in the period 1993– 2012. Before and after this period the na e is S P Bridge. Today the S P bridge, 45 years fro its opening, is ith the ain span 303 on the 4 th place in the category of cable-stayed bridges ith single to er and single cable plane © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Abstract

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.071 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. * Corresponding author. Tel.: +0-421-2-59274379; fax: +0-421-2-52494116. E-mail address: ivan.balaz@stuba.sk * Corresponding author. Tel.: +0-421-2-59274379; fax: +0-421-2-52494116. E-mail address: ivan.balaz stuba.sk