PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1065–1071 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Detection of corrosion depth in bolts by thermographic model Asseya El-amiri a , Abderrahim Saifi a , Hicham Halloua a ,Abdellatif Obbadi a ,Youssef Errami a ,Ahmed Elhassnaoui b ,Smail Sahnoun a, * a Laboratory of Electronics, Instrumentation and Energetic, Faculty of Sciences, El-Jadida BP 24000, Morocco b Laboratory of Applied Chemistry and Environment, Faculty of Science and Technology, Settat BP 577, Morocco Abstract Several industrial plants suffer from the presence of corrosion in its assembly elements. The hazardous condition of a corroded metal installation is difficult to assess by visual inspection. The existence of rust can cause accidents that have terrible technical and economic consequences.. In the context of the safety and security of personnel and metal structures subjected to heavy mechanical or thermal stresses, we propose, in this paper, a mathematical model based on the numerical three dimensional finite elements method which allows to estimate by infrared thermography the depth and the thickness of the hidden corrosion between two elements of steel assembly. The exploitation of the results obtained makes it possible to carry out preventive maintenance to eliminate the hazards before a critical threshold of the dimensions of the hidden rust is reached. We have studied the thermal response of the corroded elements with respect to the size of the hidden rust and we have taken into consideration the size of the assembly elements. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: 3D finite element method; infrared thermography; depth; corrosion thickness. 1. Introduction Industry and research organizations need high-level scientists, engineers or researchers, capable and qualified to take over modeling projects of physical phenomena, to master the mathematical aspects of models and to solve problems in an industrial context or a research perspective. Bolt systems have been widely used for many years in several industries: automotive chassis, heating, ventilation, etc. They represent the ideal solution when spot welding is not practical. They are used when a fixation is desired, and other methods are expensive or infeasible. Bolts generally lloua a ,Abdellatif Obb a oui b m a, 2017 s. take over modeling projects of p © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 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.: +212-661-347-441. E-mail address: ssahnoun@gmail.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.078 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216© 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017.