PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 P o edi Structural Integr ty 5 (2017) 69–76 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 Reno mattress for canals H Hammoum * , K Bouzelha, L Imerzoukene, M Ouharoun Civil engineering department, Mouloud Mammeri University , 15000 Tizi Ouzou, Algeria In the present work, we develop a probabilistic approach to analyze the failure functions related to the overall stability of a Reno mattress of an open canal. The considered state functions are those related to critical velocity, stability of the channel bottom, deformation eff cts, traction forces nd residual velocity at th underside of the revetment. To take the uncert inties into account, the water flow rate is considered as random variable, generated by Poisson law. For the need of reliability analysis, Monte Carlo simulation method is used. Also, the Matlab © software is used for generating random draws. The developed method in this work is applied to a practical example which is taken from the engineering field. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Probabilistic approach, reliability analysis, Monte Carlo simulation, failure functions, Reno mattress, 1. Introduction The term canal is usually understood to mean an open a tific al channel that perm ts the free flow of wat r. Canals are us d for irrigation, drainage and water supply. The free surface flows in these channels are in contact with its walls which become a characteristic of the flow as well as its geometry. A revetment is often used for canals, such as flexible structures, they have the function of providing the natural soil with mechanical protection against erosion. Among the most widely used flexible structures around the world, and with great success for transport of water in open channels, we have Reno mattress revetments. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal R liability analysis of Reno mattress fo canals H Hammoum * , K Bouzelha, L Imerzoukene, M Ouharoun Civil engineering department, Mouloud Mammeri University , 15000 Tizi Ouzou, Algeria Abstract In h present work, we develop a probabili tic approach to analyze the failure functions related to the overall stability of a Reno matt ess of an open c nal. The consi e d st te functions are those related to critical velocity, stability f the chan el bottom deformation effects, traction forces and residu l ve ocity at th unders de of the revetm nt. To tak the uncert inties int account, the w er flow rate considered as random variable, generated by Poisson law. F r the need of reliabi ity analysis, Monte Carlo simulation method s us d. Also, t e Matl b © software is used for en rating random draws. The developed method in this work is applied to a practical example which is taken from the engineering field. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Probabilistic approach, reliability analysis, Monte Carlo simulation, failure functions, Reno mattress, 1. Introduction Th term can l is usu lly understood to mea an open artificial channel t at permits the free fl w of a er. Cana are used for irrigation, drainage and water supply. The fr e surface flows in these cha nels are in contact with its walls whi h b come a characteristic f the flow as well as its geometry. A revetment is oft n used for canals, such as flexibl structures, they hav the function of p viding the natural soil with mechanical protection against osi n. Amo g the most widely used flexibl structures around the world, and with great success for transport of water in open channels, we have Reno mattress revetments. © 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. Abstract

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.2017.07.068 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216© 2017 The Authors. Published by Elsev er 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. * Correspon ing author. Tel.: +213-555-928-541; fax: +0-000-000-0000 . E-mail address: hammoum_hoc@yahoo.fr * Corresponding author. Tel.: +213-555-928-541; fax: +0-000-000-0000 . E-mail address: hammoum_hoc@yahoo.fr