PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1384–1389 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 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. © 2018 The Authors. Published by Elsevier B.V. Peer-rev ew und r responsibility of the ECF22 organiz rs. ECF22 - Loading and Environmental effects on Structural Integrity Fracture Analysis of 316L Steel Samples Manufactured by Selective Laser Melting Catrin M. Davies*, Olivia Withnell, Tobias Ronnerberg, Richard Williams, Paul A. Hooper Department of Mecahnical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ. Abstract Charpy impact and single edge notch bend, SEN(B), fracture tests have been performed on samples manufactured from selective laser melting 316L st el powder. Samples have been built in two orientatio s such that the cr ck plane was either parallel to the build layers (vertical) or normal to the build layers (horizontal). Generally it has been found that the fracture resistance of the horizontal samples is a factor of 3 higher than the vertical samples and that toughness has been consistently improved with heat treatment for the horizontal samples. However, from the limited number of tests performed, no affirmative trends were seen for the impact and fracture resistance of the vertical samples after heat treatment. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Selective laser metling, 316L, fracture toughness 1. In roduction Selective Laser Melting (SLM) is a relatively new manufacturing technique that offers many benefits. However the utilisation of SLM manufactured components depends on the assurance of their integrity during operation. The fracture resistance of SLM manufactured components is a key property that needs to be understood and predicted, especially due to presence of defects in the form of which are inevitable in SLM components. Defect orientation relative to the build and loading direction may be an important factor and methods are required to improve the ECF22 - Loading and Environmental effects on Structural Integrity Fracture Analysis of 316L Steel Samples Manufactured by Selective Laser Melting Catrin M. Davies*, Olivia Withnell, Tobias Ronnerberg, Richard Williams, Paul A. Hooper Department of Mecahnical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ. Abstract Charpy impact and si gle edge otch bend, SEN(B), fract r tests have been performed on samples manufactured from selective lase melting 316L teel powder. Samples have been built in tw orientatio s such that the crack plane was either parall l to th build layers (vertical) or normal to the build layers (horizontal). Gener lly it has been found that the fracture resistanc of t horizontal amples is a factor of 3 higher than th vertical samples a d that toughness has been consistently improved with heat treatment for the horizontal samples. However, from the limited number of tests performed, no affirmative trends were seen for the i pact and fracture resistance of the vertical sa ples after heat treatment. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Selective laser metling, 316L, fracture toughness 1. Introduction Selective Laser Melting (SLM) is a relatively new manufacturing technique that offers many benefits. However the utilisation of SLM manufactured components depends on the assurance of their integrity during operation. The fracture resistance of SLM manufactured components is a key property that needs to be understood and predicted, especially due to presence of defects in the form of which are inevitable in SLM compo ents. Defect orientation relative to the build and loading direction may be an important factor and methods are required to improve the © 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.: +442075947035 E-mail address: catrin.davies@imperial.ac.uk * Corresponding author. Tel.: +442075947035 E-mail ad ress: catrin.davies@imperial.ac.uk

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 o ganizers.

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

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.289