PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1494–15 1 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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 Evaluation of fatigue properties of S355 J0 steel using ProFatigue and ProPagation software Stanislav Seitl a,b , Petr Miarka a,b *, Jan Klusák a , Zdeněk Kala b , Martin Krejsa c , Sergio Blasón d , Alfonso F. Canteli d a Institute of Physics of Materials, Academy of Sciences of the Czech Republic, 616 62 Brno, Czech Republic b Faculty of Civil Engineering, Brno University of Technology, 602 00Brno, Czech Republic c Faculty of Civil Engineering, VŠB-Technical University of Ostrava ,708 33 Ostrava – Poruba, Czech Republic d Department of Department of Construction and Manufacturing Engineering, Universidad de Oviedo, 33203 Gijón, Spain Abstract The use of S355 high strength steel in civil engineering design of structural elements of cranes, bridges or simple engineering parts allows material and economical savings to be achieved meeting the strict construction requirements. Knowledge of fatigue resistance of the material plays the key role during design and maintenance of the civil engineering structures. With this aim, the fatigue properties (Wöhler field and crack propagation rate curve) of the S355 J0 steel are analyzed according to both traditional and probabilistic models. In the latter case, the ProFatigue and ProPagation software programs are applied in the assessment of experimental fatigue data of S355 J0 for derivation of the probabilistic S–N field and fatigue crack growth rate curve, respectively, where data consist of results for different number of various investigated specimens subject to low cycle and high cycle fatigue with focus on the rolling direction. The results obtained are compared with the customary Basquin formula for the Wöhler-curve and Paris law for the crack growth rate curve, both represented as straight lines in a double-logarithmic scale. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Steel bridge; S355 J0; fatigue; ProFatigue; ProPagation; Wöhler curve; crack growth rate curve 1. Introduction Structural elements and structures made from steel are subjected to variable loads during their service lifetime. © 2018 The Aut ors. Published by Elsevier B.V. Peer-revi w und r responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Evaluation of fatigue properties of S355 J0 steel using ProFatigue and ProPagation software Stanislav Seitl a,b , Petr Miarka a,b *, Jan Klusák a , Zdeněk Kala b , Martin Krejsa c , Sergio Blasón d , Alfonso F. Canteli d a Institute of Physics of Materials, Academy of Sciences of the Czech Republic, 616 62 Brno, Czech Republic b Faculty of Civil Eng neering, Brno Univ rsity T chnology, 602 00Brno, Czech Republic c Faculty of Civi Engineering, VŠB-Technical Ostrava ,708 33 Ostrava – Poruba, Czech Republic d Departmen of Department of Construction a d Manufacturing Engineering, Universidad de Oviedo, 33203 Gijón, Spain Abstract The use of S355 high strength steel in civil ngineering design of structural elements of cranes, bridges or simple engineering parts allow material and eco omical savings to be achieved meeting the strict co structio requ rements. Knowledge of fatigue resistance of the material plays the key role during design and maintenance of the civil engineer ng structures. With this aim, th fatigue properti s (Wöhler field and crack propagation rate curve) of the S355 J0 steel are a alyzed according to both traditional and probabilis c models. In the latter case, the ProFatigu and Pr Pagation softwar programs are pplied in he assessment of experimental fatigue ata of S355 J0 for d rivation of the probabilistic S–N field and fatigue crack growth rate curve, respectively, where data cons st of results for different number various inve igated sp cimens subject to low cycle nd high cycl fatigue ith focus on the r lling direction. Th results obtained are compared with the customary Basquin formul for the Wöhler-curv and Paris law for the crack growth rate curve, b th represented as straight lines in a double-logarithmic scale. © 2018 The Authors. Published by Elsevier B.V. Peer-review under espons bility of the ECF22 organizers. Keywords: Steel bridge; S355 J0; fatigue; ProFatigue; ProPagation; Wöhler curve; crack growth rate curve 1. Introduction Structural elements and structures made from steel are subjected to variable loads during their service lifetime. © 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.: +420 532 290 361 E-mail address: seitl@ipm.cz * Corresponding author. Tel.: +420 532 290 361 E-mail ad ress: seitl@ipm.cz

* 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 o ganizers.

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.2018.12.307