PSI - Issue 2_A

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com S ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 2 (2016) 261–268 Available online at www.sciencedirect.com Sc enceDir t Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy A 2D Peridynamic Model for Failure Analysis of Orthotropic Thin Plates Due to Bending A. Taştan a , U. Yolum a,b , M. A. Güler a *, M. Zaccariotto c , U. Galvanetto c a Department of Mechanical Engineering, TOBB University of Economics and Technology, Sö ğ ütözü, Ankara 06560, Turkey b Helicopter Group, Turkish Aerospace Industries (TAI), Kazan, Ankara 06980, Turkey c Department of Industrial Engineering, University of Padova, Via Venezia 1, Padova 35131, Italy Abstract The present paper deals with the problem of cracks propagating in thin orthotropic flat plates under bending loads. We define the mechanical behavior of an orthotropic lamina in which shear deformation can be neglected (Kirchhoff plate). The formulation follows the main ideas of bond based Peridynamics. Failure criteria limit the maximum curvatures and provide failure values which may be different in different directions. Several numerical examples show that the results obtained with the new approach are in good agreement with those obtained with more classical computational methods. Moreover the numerically computed crack patterns seem to follow in a reasonable way the orthotropic properties of the models. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords:Peridynamic The ry; Bending Failure Nomenclature PD 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy A 2D Peridynamic Model for Failure Analysis of Orthotropic Thin Plates Due to Bending A. Taştan a , U. Yolum a,b , M. A. Güler a *, M. Zaccariotto c , U. Galvanetto c a Department of Mechanical Engineering, TOBB University of Economics and Technology, Sö ğ ütözü, Ankara 06560, Turkey b Helicopter Group, Turkish Aerospace Industries (TAI), Kazan, Ankara 06980, Turkey c Department of Industrial Engineering, University of Padova, Via Venezia 1, Padova 35131, Italy Abstract The present paper deals with the problem of cracks propagating in thin orthotropic flat plates under bending loads. We define the mechanical behavior of an ort otropic lamina in which she r deformation can be neglected (Kirchhoff plate). The formulation follows the main ideas of b nd based Peridynamics. Failure criteria limit the maximum curvatures and rovide failure values which may be different in different irections. Several n merical exa ples show that the results obtained with the new approach are in good agreement with thos obtained with more classical computational methods. Moreover the umerically computed crack patterns see to follow in a reasonable way th orthotropic properties of the models. © 2016 The Authors. Published by Elsevier B.V. Peer-review under respons bility of the Scientific Committee of ECF21. Keywords:Peridynamic Theory; Bending Failure N me clature PD Peridynamics CCM Classical Continuum Mechanics LT Lam ate Theory Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Peridynamics CCM Classical Continuum Mechanics CLT Classical Laminate Theory SED Strain Energy Density FEA Finite Element Analysis SED Str in Energy Density F A Finite lement A alysis 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 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +90-312-292-4088; fax: +90312-292-4091. E-mail address: mguler@etu.edu.tr 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +90-312-292-4088; fax: +90312-292-4091. E-mail address: mguler@etu.edu.tr

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.034