PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available online at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1312–1317 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural I t grity 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. ECF22 - Loading and Environmental effects on Structural Integrity An Experimental and Numerical Investigation of the Anisotropic Plasticity and Fracture Properties of High Strength Steels from Laboratory to Component Scales Fuhui Shen a , Junhe Lian a,b, *, Sebastian Münstermann a , Valentin Kokotin c , Thomas Pretorius c a Steel Institute, RWTH Aachen University, Inzestraße 1, 52074 Aachen, Germany b Impact and Crashworthiness Lab, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA c thyssenkrupp Steel Europe AG, Kaiser-Wilhelm-Straße 100, 47166, Duisburg, Germany Abstract Experimental and numerical investigations on the plasticity, damage and fracture behavior of a pipeline steel were conducted in this study. Anisotropy effects on the plastic deformation and fracture properties of the material were taken into consideration by performing tests along different loading directions with respect to the rolling direction. Fracture behavior of the steel was characterized through conducting a comprehensive experimental program covering a wide range of stress states by using fracture specimens of various geometries along different loading angles. Besides the fracture experiments in the laboratory scale, the drop weight tear tests of full plate thickness along different loading directions were performed as well. The recently proposed evolving non-associated Hill48 model was adopted to describe the anisotropic hardening behavior of the investigated material. Finite element analysis on the fracture behavior of this material was performed by using a coupled damage mechanics model with triaxiality and Lode angle dependence. Through the hybrid experimental and numerical investigations, the influences of anisotropy on the plastic deformation and fracture behavior of the pipeline steel are analyzed. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity An Experimental and Numerical Investigation of the Anisotropic Plasticity and Fracture Properties of High Strength Steels from Laboratory to Component Scales Fuhui Shen a , Junhe Lian a,b, *, Sebastian Münstermann a , Valentin Kokotin c , Thomas Pretorius c a Steel Institute, RWTH Aachen University, Inzestraße 1, 52074 Aachen, Germany b Impact and Crashworthiness Lab, Department of Mech nical E gineering, Mass chusetts Institute of Technology, Cambridge, MA 02139, USA c thyssenkrupp St el Europe AG, Kaiser-Wilhelm-Straße 100, 47166, Duisburg, Germany Abstract Experimental and numerical investigations on the plasticity, damage and fracture behavior of a pipeline steel were conducted in this study. Anisotropy effects on the plastic deformation and fracture properties of the material were taken into consideration by performing tests along different loading dir ctions with respe t to the rolling direction. Fractur behavior of the steel was characterized through conducti g a comprehensive experimental program c vering a wide range of stress states by using fracture specim ns of various geometries along different loading angles. Besides the fracture experiments in th laboratory scale, the drop weight tear tests of full plat thickness along different loading directions w re performed as well. The recently proposed evolving non-associated Hill48 model was adopted to describe the anisotropi hardening behavior of the investigat d material. Finite element analysis on the fracture behavior of this material was performed by using a coupled damage mechanics model with triaxiality and Lode angle dependenc . T rough the hybrid experimental and numerical investigations, the influences of anisotropy on the plastic deformation and fracture behavior of the pipelin ste l are a alyzed. © 2018 The Author . Published by Elsevi B.V. Peer-revi w under r sponsibility of the ECF22 organizers.

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Anisotropy, damage mechanics model, ductile fracture, high-strength steels. Keywords: Anisotropy, damage mechanics model, ductile fracture, high-strength steels.

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

* 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 organizers. * Corresponding author. Tel.: +49-241-80-92912; fax: +49-241-80-92253. E-mail address: junhe.lian@iehk.rwth-aachen.de, lianjh@mit.edu * Corresponding author. Tel.: +49-241-80-92912; fax: +49-241-80-92253. E-mail ad ress: junhe.lian@iehk.rwth-aachen.de, lianjh@mit.edu

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.2018.12.276