PSI - Issue 4

ScienceDirect Available online at www.sciencedirect.com Av ilable online at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia S ructural Int grity 4 ( 7) 1–2 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect 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. Copyright © 2017. The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24 ESIS TC24 Workshop "Integrity of Railway Structures", 24-25 October 2016, Leoben, Austria Editorial Hans-Peter Gänser a,* , Stefano Beretta b, † a Materials Center Leoben Forschung GmbH, Roseggerstraße 12, 8700 Leoben, Austria b Politec ico di Milano, Dipartime to di Mecc nica, Via La Masa 1, 20156 Milano, Italy © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. Since its establishment in 2004, ESIS Technical Committee 24 “Integrity of Railway Structures” has regularly been conducting workshops to discuss ongoing work and recent research results. Continuing this tradition, the 2016 meeting in Leoben again brought to ether engineers and scientists from all ov r Europe and Asia. The slides of the about twenty presentations given are available online at http://esistc24.mecc.polimi.it. Extended versions of twelve of these lectures are published in this conference volume, giving a representative – albeit by no means complete – overview about current work and issues regarding the reliability of railway structures. The open access model of the Procedia Structural Integrity is expected to help in disseminating the committee’s activities as broadly as possible, and to foster discussion within the scientific and technical community beyond the “railway family”. Keeping this aim in mind, the topics covered in this volume span a broad range from probabilistic considerations regarding damage accumulation by S.-P. Zhu et al. over fatigue tests under VA and damage calculations in the project EURAXLES by M. Filippini et al. to an on-hands analysis of an axle fracture by Z. Odanovic. Adv ced xperiments and models for plasticity- and oxide debris-induced crack closure effects on fatigue crack growth are reported from the ongoing project EBFW3 (Eise bahnfa rwerke 3, Railway Running Gears 3) by J. Maierhofer et l. and D. Simunek et al. , whereas I. Černý r ports on advances in rotating bending axle testing. Ever-increasing attention is being paid to the role of residual stresses on the fatigue lifetime, reflected by two contributions from P. Hutař et al. and H.-J. Schindler, and to corrosion fatigue, with results from the project RAAI (Whole life Rail Axle Assessment and Improvement) reported by S. Beretta et al . R. Boehm et al. and M. Pavlovic et al. present recent advances in ultrasonic testing of axles, inextricably linked to the d rivation of inspection intervals for predi tive aintenance. ESIS TC24 Workshop "Integrity of Railway Structures", 24-25 October 2016, Leoben, Austria Editorial Hans-Peter Gänser a,* , Stefano Beretta b, † a Ma rials Center Le ben Forschung GmbH, Roseggerstr ße 12, 870 Leoben, Austria b Politecnico di Milano, Dipartimento di Meccanica, Via La Masa 1, 20156 Milano, Italy © 2017 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. Since its establishment in 2004, ESIS Technical Committee 24 “Integrity of Railway Structures” has regularly been conducting workshops to discuss ongoing work and recent research results. C ntinui g this tradition, the 2016 meeting i Leoben again brought together engineers nd scientists from all over Europe and Asia. The slides of the about twenty presentations given are avai able onlin at http://esistc24.mecc.polimi.it. Extended v rsions of tw lve of th se lect res are published in this confere ce volume, giving representativ – alb it by no means complete – overview abo t c rrent work and issu s regarding the reliability of railway structur s. The op n access model f the Procedia Structural Integrity is expected to help in disseminating the committee’s activities s broadly as possible, and to foster discussion within the scientific and technical community beyond the “railway family”. Keeping this aim in mind, the topics covered in this volume span a broad range from probabilistic considerations regarding damage accumulation by S.-P. Zhu et al. over fatigue tests under VA and damage calculations in the project EURAXLES by M. Filippini et al. to n on-hands analysis of an axle fracture by Z. Odanovic. Advanced experiments and models for plasticity- and oxi e debri -induc d crack closure effects on fatigue crack growth are eported from the ongoing proj ct EBFW3 (Eise bah f hrwerke 3, Railway Ru ning G ars 3) by J. Maierhofer et al. nd D. Simun k et al. , whereas I. Černý reports on advances in rotating b nding axl testing. Ever-increasing attention is being paid to the role of resi ual stresses on the fatigue lif time, reflected by two contributi ns from P. Hutař et al. and H.-J. Schindler, and to corrosion fatigue, with results from the project RAAI (Whole life R il Axle Assessment and Improv ment) reported by S. Beretta e al . R. Boehm et al. and M. Pavlo ic et al. present recent advances in ultrasonic testing of axles, inextricably linked to the derivation of inspection intervals for predictive maintenance. © 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.

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 ESIS TC24 10.1016/j.prostr.2017.07.011 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ESIS TC24. hp.gaens @mcl.at * Tel.: +433842-45922-41; fax: +433842-45922-5. E-mail address: stefano.beretta@polimi.it * Tel.: +433842-45922-32; fax: +433842-45922-5. E-mail address: hp.gaenser@mcl.at * Tel.: +433842-45922-41; fax: +433842-45922-5. E-mail address: stefano.beretta@polimi.it 32