PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedirect.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 489–495 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Case Study - The Mehmed Pasha Sokolovic Bridge Vera Vujović a * * DIVK, Belgrade, 11000, Serbia Abstract During the research were discussed numerous aspects of management and maintenance of which are based on structural durability, reliability, risk management, integrity and service life with a special reference to the proposal consideration of the Maintenance Design the historic stone bridge (including monitoring). The purpose of researches is designed to assist in developing a basis for decision-making, and the purpose of the case study is to explain the importance of the introduction of advanced system maintenance and monitoring of historical Mehmed Pasha Sokolovic Bridg . © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: stone bridge; structural durability; integrity; service life; reliability; maintenance design; monitoring 1. Introduction and objectives The bridge of Mehmed-pasha Sokolovic built over the Ottoman period more than 440 ye rs ago through the Drina River i Visegrad, i has exceptional hi torical, cultural, artistic d material values and r quires a responsible attitude towards lasting protection. Due to its poor condition and major damage, the bridge was closed for road traffic since 2003, and the World Monuments Fund was registered as an endangered world location in 2005, and in 2007 it is located on the UNESCO list of facilities in the world cultural heritage. Thanks to the donation of the Government of Turkey, after the inspection and exploration work on the basis of the technical study and the project documentation, its rehabilitation was carried out. The concept of the case study is based on the Bridge Management Plan (2003-2005) and is dedicated to the character and work of Professor Milan Gojkovic (1926-2002) who participated in numerous projects, lecturer and author of several professional books n the topic of reconstruction of stone bridges, which in this way provided an invaluable contribution to improving the methodology of maintaining stone bridges. The main ECF22 - Loading and Environmental effects on Structural Integrity Case Study - The Mehmed Pasha Sokolovic Bridge Vera Vujović a * * DIVK, Belgrade, 11000, Serbia Abstract During the research were discussed numerous aspects f management and maintenance of which are based on structural durability, reliability, risk management, integrity and service life with a special reference to the proposal consideration of the Maintenance Design the historic stone bridge (including monitoring). The purpose of researches is designed to assist in developing basis for decision-making, and the purpose of the case study is to explain the imp rtance of the introduction f ad ance system m intenance and m itoring of historical Mehmed Pasha Sokolovic Bridge. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: stone bridge; structural durability; integrity; service life; reliability; maintenance design; monitoring 1. Introduction and objectives The bridge of M hmed-pasha Sokolovic built over the Ottoman period more han 440 yea s ag through the Drina River in Visegrad, it has exceptional historical, cultural, artistic and material values and requires a responsible attitude towards lasting protection. Due to its poor condition and major damage, the bridge was closed for road traffic since 2003, and the World Monuments Fund was registered as an endangered world location in 2005, and in 2007 it is located on the UNESCO list of facilities in the world cultural heritage. Thanks to the donation of the Government of Turkey, after the inspection and exploration work on the basis of the technical study and the project documentation, its rehabilitation wa carried out. The concept of the case study is based on the Bridge Management Plan (2003-2005) and is d dicated to the character and work of Professor Milan Gojkovic (1926-2002) who participated in numerous projects, lecturer and author of several professional books on the topic of reconstruction of stone bridges, which in this way provided an invaluable contribution to improving the methodology of maintaining stone bridges. The main © 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.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 organizers. * Corresponding author. Tel.: +381 654 726 776; fax: +0-000-000-0000 . E-mail address: veravujovic10@gmail.com * Corresponding author. Tel.: +381 654 726 776; fax: +0-000-000-0000 . E-mail ad ress: veravujovic10@gmail.com

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

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.081