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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 MCM 2017 organizers. XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Effect of micro-morphology of cortical bone tissue on fracture toughness and crack propagation Mayao Wang a , Elizabeth A. Zimmermann b , Christoph Riedel b , Björn Busseb, Simin Li a , Vadim V. Silberschmidt a 0F * a Loughborough University, UK b University Medical Center Hamburg-Eppendorf, Hamburg, Germany Abstract Specific features of crack propagation in human cortical bone depend on many factors; bone micro-morphology is one of the main features. A bone compact-tension simulation model with zero-thickness cohesive element is employed in this study to investigate the effect of micro-morphology of cortical bone on fracture toughness and crack propagation. Various groups of bone sample – from young, senior, diseased and treated patients – were studied. It was found that the young group has the best performance in terms of fracture resistance, with the initiation fracture toughness ( K 0 ) and slope of 1.45 MPa(m) 1/2 and 1.16 MPa(m) 1/2 /mm, respectively. The cracks in this group propagate mostly along the cement line to protect osteons from crack penetration. © 2017 The Authors. Published by Elsevier B.V. Peer-review und r responsibility of the MCM 2017 organizers. Keywords: Bone; Micro-morphol gy; Fracture toughness; Crack pr pagation XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Effect of micro-m rphology of cortical bone tissue on fracture toughness and crack propagation Mayao Wang , Elizabeth A. Zimmermann , Christoph Riedel , Björn Busse , Simin Li , a b b b a Vadim V. Silberschmidt a 0F * a Loughborough University, UK b University Medical Center Hamburg-Eppendorf, Hamburg, Germany Abstract Specific features of crack propagation in hum n cortical bone depend on many factors; bone micro- orphology is one of the main fe tures. A bone compact-tension simulation model with zero-thickness cohesive element is employed in this study to investigate the effect of micro-morphology of cortical bone on fracture toughness and crack propagation. Various groups of bone sample – from young, senior, diseased and treated patients – were studied. It was found that the young group has the best performance in terms of fracture resistance, with the initiation fracture toughness ( K 0 ) a d slope of 1.45 MPa(m) 1/2 and 1.16 MPa(m) 1/2 /mm, respectively. The cracks in this group propagate mostly along the cement line to protect osteons from crack penetration. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Bone; Micro-morphology; Fracture toughness; Crack propagation © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. A traditional method to measure fracture resistance of human cortical bone is by evaluation of its mineral density. Still, this single factor is insufficient to predict bone fracture because of heterogeneous properties and a hierarchical 1. Introduction A traditional method to measure fracture resistance of human cortical bone is by evaluation of its mineral density. Still, this single factor is insufficient to predict bone fracture because of heterogeneous properties and a hierarchical Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. 1. Introduction

* 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 MCM 2017 organizers. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. * Correspon ing author. Tel.: +44-1509-227504; fax: +44-1509-227502. E-mail address: V.Silberschmidt@lboro.ac.uk * Corresponding author. Tel.: +44-1509-227504; fax: +44-1509-227502. E-mail address: V.Silberschmidt@lboro.ac.uk

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 MCM 2017 organizers. 10.1016/j.prostr.2017.11.010