PSI - Issue 7

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ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia S ructural Int grity 7 ( 7) 1–2 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000–000 Structural Integrity Procedia 00 (2017) 000–000

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www.elsevier.com/locate/procedia 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. Copyright © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Sci ntific Committee of the 3rd I ternational Symposium on Fatigue Design nd Material Defects. 3rd International Symposi m on Fatigue Design and Material Defects, FDMD 2017, 19-22 September 2017, Lecco, Italy Editorial S. Beretta a *, S. Foletti a , G. Nicoletto b , R. Tovo c a Politecnico di Milano, Department Mechanical Engineering, Via la Masa 1, Milano 20156, Italy b Università di Parma, Dipartimento di Ingegneria e Architettura, Parco Area delle Scienze 181/A, 43125 Parma, Italy c Università di Ferrara, Dipartimento di Ingegneria, Via Saragat 1, 44122, Ferrara, Italy © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. The actual fatigue strength and service life of structural components is typically controlled by the defect population due to the manufacturing process. These defects accelerate the initial phase of fatigue damage accumulation into a physical micro crack whose dimensions involve a few microstructural units. The concepts of defect-tolerant design, developed more than 20 years ago, aim to cover the gaps among stress based design approaches with generous safety factors, fracture-mechanics-based residual life assessments and NDE requirements. Metal Additive Manufacturing (AM) exemplifies an emerging field where the capability to predict fatigue properties and service life of components using the defect-tolerant design approach has great potential. After t previous successful events of Trondheim i 2011 and of Paris in 2014, the third editi n of the Fatigue D ign nd Material Defec s symposium held in Le co, Italy, in September 2017 attracted searchers and ex rts from all over the world (European Union, Japan, China, India, Russia, Algeria, Canada, United States, Argentina). During the symposium, the more than 100 presentations provided an update of the ongoing research on the key connections between manufacturing processes, fatigue properties and component design in industry. The complete program of the FDMD3 Symposium and the Book of Abstracts can be found at: http://www.fdmd3.polimi.it/programme/. Thematic sessions on specific topics (i.e. experimental techniques, fatigue thresholds, VHCF, additive manufacturing, multiaxial fatigue, advanced materials) and on industrial applications (defect assessment methods, 3rd International Symposium on Fatigue Design and Material Defects, FDMD 2017, 19-22 September 2017, Lecco, Italy Editorial S. Beretta a *, S. Foletti a , G. Nicoletto b , R. Tovo c a Politecnico di Milano, Department Mechanical Engineering, Via la Masa 1, Milano 20156, Italy b Università di Parma, Dipartimento di Ingegneria e Architettura, Parco Area delle Scienze 181/A, 43125 Parma, Italy c Università di Ferrara, Dipartimento di Ingegneria, Via Saragat 1, 44122, Ferrara, Italy © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. The actual fatigue strength and service life of structural components is typically controlled by the defect population due to the manufacturing process. These defects accelerate the initial phase of fatigue damage accumulation into a physical micro crack whose dimensions involve a few microstructural units. The concepts of defect-tolerant design, developed more than 20 years ago, aim to cover the gaps among stress based design approaches with generous safety factors, fracture-mechanics-based residual life assessments and NDE requirements. Metal Additive Manufacturing (AM) exemplifies an emerging field where the capability to predict fatigue properties and service life of components using the defect-tolerant design approach has great potential. After the previous successful events of Trondheim in 2011 and of Paris in 2014, the third edition of the Fatigue Design and Material Defects symposium held in Lecco, Italy, i September 2017 attracted researchers and experts from all over the world (European Union, Japan, China, India, Russia, Alger a, Canada, United Sta es, Argentina). During the symposium, the more than 100 presentations provided an update of the ongoing research on the key connections between manufacturing processes, fatigue properties and component design in industry. The complete program of the FDMD3 Symposium and the Book of Abstracts can be found at: http://www.fdmd3.polimi.it/programme/. Thematic sessions on specific topics (i.e. experimental techniques, fatigue thresholds, VHCF, additive manufacturing, multiaxial fatigue, advanced materials) and on industrial applications (defect assessment methods, © 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.: +39-0223998246; fax: +39-02-23998202. E-mail address: stefano.beretta@polimi.it 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. * Correspondi g author. Tel.: +39-0223998246; fax: +39-02-23998202. E-mail address: stefano.beretta@polimi.it

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt

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

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of the 3rd International Symposium on Fatigue Design and Material Defects. 10.1016/j.prostr.2017.11.052