PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable online at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 P o edi Structural Integr ty 5 (2017) 77–84 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2017) 000 – 000 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 Reliability analysis of stability to sliding of earthen embankment under seismic effect K Bouzelha*, H Hammoum, C Amirouche, T Chaouadi Civil engineering department, Mouloud Mammeri University , 15000 Tizi Ouzou, Algeria Abstract In this study, we are interested in the reliability analysis of stability to sliding of an homogeneous embankment realized with local materials. Modified Fellenius method, taking into account seismic effect and saturation line is used to define the limit state function. The failure probability of the embankment upstream slope, to the limit state of sliding, is evaluated by classical Monte Carlo simulation. The considered random variable in this probabilistic analysis is the acceleration coefficient of the seismic zone which is generated by a lognormal distribution. Matlab © software is used to generate random draws . Finally, the developed approach in this work is applied to an embankment taken among small dams existing in Tizi Ouzou region, Northern Algeria. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Reliability analysis ; stability to sliding ; Earthen dam ; Monte Carlo simulation ; failure probability . 1. Introduction In civil engineering field, problems of stability to sliding of earthen dams slopes (upstream and downstream) have, since a long time, preoccupi geotechnical engineers and researchers. The disorders engendered by their break-up are devastating, often destructive and sometimes murderous. Many methods for stability calculating at break have been proposed; such as of Fellenius Method, Bishop Method and Spencer Method (Costet et al., 1983), which differ in the assumptions made about the sliding surface shape. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Reliability analysis of stability to sliding of earthen embankment under seismic effect K Bouzelha*, H Hammoum, C Amirouche, T Chaouadi Civil engineering department, Mouloud Mammeri University , 15000 Tizi Ouzou, Algeria Abstract In this study, we ar int rested in the reliability analysis of stability to sliding of an homogeneous mbankment rea zed with local materials. Modified Fel enius m thod, ta ing into account seismic effect and saturation line is used to efine the limit sta function. The failure pr bability of the emb nkm nt upstream slope, to the limit state of sliding, is evaluated by cla s cal Mont Carlo s mulation. The considered r n om variable in this probabilistic analysis is th cceleration coefficient of the seismic zone which is generated by a lognormal distribution. Matlab © s ftware is used to generate random d aws . Finally, the d veloped approach in this work is applie to an embankme t taken amo g small dams exis ing in Tiz Ouzou region, Northern Algeria. © 2017 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Reliability analysis ; stability to sliding ; Earthen dam ; Monte Carlo simulation ; failure probability . 1. Introduction In civil engineering field, problems of stability to slidi g of earthen dams slopes (upstream and downstream) have, sinc a long time, preoccup ed geot chnical engineers and researchers. The disorders engendered by their break-up are devastating, often destructive and sometimes murd rous. Many methods for stability calculating at break have been proposed; such as of Fellenius Method, Bishop Method and Spencer Method (Costet et al., 1983), which differ in the assumptions made about the sliding surface shape. © 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.: +213-770-998-940; fax: +0-000-000-0000 . E-mail address: k_bouzel@yahoo.fr * Correspon ing auth r. Tel.: +213-770-998-940; fax: +0-000-000-0000 . E-mail address: k_bouzel@yahoo.fr

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.2017.07.070 * 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. 2452-3216© 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017.