PSI- Issue 9

ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 9 (2018) 235–242 Available online at www.sciencedirect.com ScienceDirect Structural Int grity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

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-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. IGF Workshop “Fracture and Structural Integrity” A new test for the characterization of mode II fracture of two peci s of wood: Thuja and Eucalyptus Grandis Amal Saoud a* , Abdelhamid Elamri a , Khadija Kimakh a , M’hamed Chergui a , Mohsine Ziani b , Moussa Elmatar c a University of Hassan II, National Superior School of Electricity and Mechanics Casablanca (ENSEM), LCCMMS, Morocco. b Institut National des Sciences de l’Archéologie et du Patrimoine (INSAP)/Rabat, Morocco. c Centre Technique d’Industrie du Bois et d’Ameublement (CTIBA)/Casablanca, Morocco. Abstract Shear strength (Mode II fracture) is one of the properties often used to describe a wood species for its exploitation in the industry. But until then there is no standardized test that can explain this phenomenon. In our work, we adopted a new approach to study the behavior of wood material subjected to mode II of rupture, to be done, we conceived and realized a new prototype of taste, of the wood whic we tested within ou laboratory wher we have been able to obs rve that the propagation of the crack our case is stable, which gives rise to an valuation of the rupture ntil separation by hearing of the specimen in the single longi udinal la e. A s ries of tests were carried out on two specie , Thuja (Tetraclinis Articulata (Vahl) Masters) an Eucalyptus Gr ndis as t st mat rial to o tain the typical recording of the displac ment displacement curve, which llowed us to determine one parameter considered important in the linear mechanism of rupture (MLR): The strain energy release rate that by using the iterion of IRWIN KIES as well as the method of complaisance. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. IGF Workshop “Fracture and Structural Integrity” A new test for the characterization of mode II fracture of two species of wood: Thuja and Eucalyptus Grandis Amal Saoud a* , Abdelhamid Elamri a , Khadija Kimakh a , M’hamed Chergui a , Mohsine Ziani b , Moussa Elmatar c a University of Hassan II, Superior School of Electricity and Mechanics Casablanca (ENSEM), LCCMMS, Morocco. b Institut Natio al des Sciences de l’Archéologie et du Patrimoine (INSAP)/Rab t, Moro co. c Ce tre Technique d’Industrie du Bois et d’Ameublement (CTIBA)/Casablanca, Morocco. Abstract Shear strength (Mode II fracture) is one of the properties often us d to describe a wood species for its exploitation in the industry. But until then there is no standardized test that can ex lain this phenomenon. In our work, we adopted a new approach to study t behavior of wood material subjected to mode II of rupture, to b done, we conceived and realized a new prototype of taste, of the wood which we tested within our laboratory where we have been able to observe that the propagation of the crack in our case is stable, which gives rise to an evaluation of th rupture ntil s paration by shearing of the specim n i the singl longitudinal plane. A s ries of tests were carried out on tw species, Thuja (Tetraclinis A ticulata (Vahl) Masters) and Eucalyptus Grandis s test material to obtain th typical recording of the displ cement displacem t curv , wh c allowed us to determine one parameter co si red important in the linear echanism of rupture (MLR): The strain energy rele se rate tha by using the criterion of IRWIN KIES as well as the method of complaisance. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Shear strength; Mode II fracture; Tetraclinis Articulata and Eucalyptus Grandis Keywords: Shear strength; Mode II fracture; Tetraclinis Articulata and Eucalyptus Grandis

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +212633016807. E-mail address: saoudamal22@gmail.com * Correspon ing author. Tel.: +212633016807. E-mail address: saoudamal22@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  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2018.06.040 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2018 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.