PSI - Issue 2_A

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 2487–2494 Available online at www.sciencedirect.com ScienceDirect 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 Fatigue Crack Growth Life Assessment for Industrial Applications using Re-meshing and Bayesian Hybrid Techniques Adrian Loghin*, Balajee Ananthasayanam, Jeff LeMonds, Arun Subramaniyan, Felipe Viana General Electric Global Research Center, Niskayuna, NY, USA In this study, two different techniques are outlined for assessment of fatigue crack growth life of industrial components: i) a finite element based approach (3DFAS, G proprietary) using re-meshing tech iques that allows automatic propagation of cracks under realistic loading conditions and ii) novel approach using Bayesian hybrid methods (BHM) that significantly improves the efficiency of life assessment computation of the former approach. Parallel processing of a set of three dimensional crack geometries using 3DFAS and Ansys ™ is used to create a crack propagation space that is further used to build metamodels required to assess propagation life for an asymmetrically grown planar crack. Verification of the 3DFAS-BHM procedure against automatic (serial mode) finite element crack propagation simulation (using 3DFAS) is provided. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: crack propagation, fracture mechanics, finite element, 3DFAS, life assessment 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Fatigue Crack Growth Life Assessment for Industrial Applications using Re-meshing and Bayesian Hybrid Techniques Adrian Loghin*, Balajee Ananthasayanam, Jeff LeMonds, Arun Subramaniyan, Felipe Viana General Electric Global Research Center, Niskayuna, NY, USA Abstract In this study, two different techniques are outl ned for assessment of fatigue crack growth ife of industrial components: i) a finite element ba ed approach (3DFAS, GE pr priet ry) using re-meshing techniques t at allows au omat c propagation of cracks under realistic loading conditions and ii) ovel appr ach using B yesian hybrid methods (BHM) that significantly improves the effici ncy of life assessme t computation of the form r approach. P r llel processing of a set of three dimension l crack g ometries u ing 3DFAS and Ansys ™ is used o reate a crack propagation spa e that is further used to build metamodels required to assess propagat on life for an asymmetrically grown planar crack. Verification of the 3DFAS-BHM procedure against automatic (serial mode) finite element crack propagation simulation (using 3DFAS) is provided. © 2016 The Authors. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: crack propagation, fracture mechanics, finite element, 3DFAS, life assessment Copyright © 2016 The Aut ors. Published by Elsevier B.V. This s an op n access article under the CC BY-NC-ND licens (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review und responsibility of the Scientific Committee of ECF21. Abstract © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Nomencl ture 3DFAS T ree Dimensional Fracture Analysis System BHM Bayesian Hybrid Modelling a Nomenclature 3DFAS Thr e Dim nsional Fractur Analysis System BHM B yesian Hybrid M delling a Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. crack depth dimension (minor semi-axis length of the elliptical crack surface) crack depth dimension (minor semi-axis le gth of the elliptical crack surface)

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2016 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. * Correspon ing author: Tel.: 01-518-387-4337; fax: 01-518-387-7006. E-mail address: loghin@ge.com * Corresponding author: Tel.: 01-518-387-4337; fax: 01-518-387-7006. E-mail address: loghin@ge.com

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.2016.06.311