PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedirect.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1533–1538 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Int 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 Investigation of Fracture Properties by Inverse Analysis on Selected SCC Concrete Beams with Different Amount of Fibres Oldřích Sucharda , Petr Lehner b *, Petr Konečný b , Tomasz Ponikiewski c a VSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Building Materials and Diagnostics of Structures, Ludvíka Podéšt ě 1875/17, 708 33 Ostrava-Poruba, Czech Republic b VSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Ludvíka Podéšt ě 1875/17, 708 33 Ostrava-Poruba, Czech Republic c Silesian University of Technology, Faculty of Civil Engineering, Department of Building Materials nd Proce ses Engineering, Akademicka 5, 44-100 Gliwice, Poland Abstract Self-compacting concrete (SCC) and Steel fibre reinforced concrete (SFRC) have higher tensile strength capacity, limited crack width and higher post peak capacity, as well as easier construction handling. Thus SFRC allows for advanced and innovative design of concrete structures. However, the current wider structural applicability of the discussed composite material is limited by lack of knowledge and recommendations for advanced design and analysis considering non-linear calculation as well corrosion related durability. Therefore, it is necessary to have knowledge of several physical and mechanical properties or to be able to identify the properties of interest. The article presents the results of the identification of fracture properties of selected self-compacting concrete that are suitabl for nonlinear fi ite lement analyses. Moreover, the ability of selected concrete to the ingress of chlorides is f particular interest as well. Interest in materi l properties consisted of concrete tensile strength, modulus of elasticity, softening factors and specific frac ure energy. The procedure for identifying mater al properties by invers analysis as pplied. New knowled e of material roperties can be us d to analyse simi ar tasks, especially in the case of no linear analysis of concrete structures. ECF22 - Loading and Environmental effects on Structural Integrity Investigation of Fracture Properties by Inverse Analysis on Selected SCC Concrete Beams with Different Amount of Fibres Oldřích Sucharda a , Petr Lehner b *, Petr Konečný b , Tomasz Ponikiewski c a VSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Building Materials and Diagnostics of Structures, Ludvíka Podéšt ě 1875/17, 708 33 Ostrava-Poruba, Czech Republic b VSB-Technical University of Ostrava, Faculty of Civil Engineering, Dep rtment of Structural Me hanics, Ludvíka Podéšt ě 1875/17, 708 33 Ostrava-Poruba, Czech Republic c Silesian University of Technology, Faculty of Civil Engineering, Dep rtment of Building Materials and Processes Engineering, Akademicka 5, 44-100 Gliwic , P land Abstract Self-compacting concrete (SCC) and Steel fibre reinforced concrete (SFRC) have higher tensile strength capacity, limited crack width and higher p st peak capacity, as w ll as easi r c nstru tion handling. Thus SFRC allows for advanced nd innovative design of concrete structures. However, the curr nt wider structural applic bility of t e discussed comp site material is limited by lack of knowledg and recommendations for advance design and nalysis considering non-linear calculation as well corrosion related durability. Therefore, it i necessary to have knowledge of several physical and mechanical properties or to b able to identify the properties of int r st. The article pr sents the res lts of the dentification of fracture properties of selected self-compacting concr t that are suitable for nonlinear finit lement analyses. M eover, the ability of selected concrete to the ingress f chlor des is of particul r inter st a well. Interest in terial properties consisted of concrete t nsi e s re gth, modulus of elasti ity, softening factors nd specific fracture nergy. The procedu e for identifying material properties by inverse alysis w s appli d. New kn wledge of material properties can be used to analyse similar tasks, especially in the case of nonlinear analysis of concr te structures. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. © 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Self-compacting concrete; Steel fibres; Flexural tensile strength; Fracture energy; Deflection-CMOD relationship Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Keywords: Self-compacting concrete; Steel fibres; Flexural tensile strength; Fracture energy; Deflection-CMOD relationship

* Petr Lehner. Tel.: +420 59 732 1391 E-mail address: petr.lehner@vsb.cz * Petr Lehner. Tel.: +420 59 732 1391 E-mail add ess: petr.lehner@vsb.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.2018.12.313