PSI- Issue 9

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 P o edi Structural Integr ty 9 (2018) 47–54 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Liviu Marsavina a *, Octavian Pop b , Emanoil Linul a a University Politehnica Timisoara, Blvd. M. Viteazu, No. 1, Timisoara 300222, Romani b Universite de Limoges, GC2D, EA 3178, Egletons F-19300, France Abstract Particleboard (PB) are wood-based composite with fine wood fibers bound together by a small amount of polymeric adhesive, widely used in furniture industry and civil engineering. PB plates can be painted, laminated or veneered, and have good dimensional stability and load bearing capacity when properly designed. However, the deformation and fracture of such elements create malfunctions of structures made of MDF. This paper presents experimental results obtained for mode I and mode II fracture toughness. The fracture toughness tests were performed on Single Edge Notched Bend (SENB) specimen for mode I, respectively on Compact Shear (CS) specime s for mod II loading. Digital Image C rrelation is applied in order to measure the displacement field evolution near the crack. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Keywords: Particleboard; mixed mode loading; fracture toughness 1. Introduction Particleboard (PB) are wood-bas d composite with fine wood fibers bound togeth r by a small a ount of polymeric adhesive, widely used in furniture industry a d civil engineering, Beer et al. (2005). PB plates can be painted, laminated or veneered, and have good dimensional stability and load bearing capacity when properly designed, Beer et al. (2008). However, the deformation and fracture of such elements create malfunctions of structures made of PB. Most of the fracture studies were performed on wood Samarasinghe and Kulasiri ( 2000) Stanzl-Tschegg and Navi (2009), Murata et al. (2011), Danielsson (2013), Craciun et al. (2014), Franke and Quenneville (2014) and MDF IGF Workshop “Fracture and Structural Integrity” Mixed mode fracture toughness of particleboard Liviu Marsavina a *, Octavian Pop b , Emanoil Linul a a University Politehnica Timisoara, Blvd. M. Viteazu, No. 1, Timisoara 300222, Romani b Universite de Limoges, GC2D, EA 3178, Egletons F-19300, France Abstract P rticleboard (PB) are wood-b sed composite with fine wood fibers bound together by a small mount of polym ric adhesive, widely used in furniture industry and civil engineering. PB plate can be pai ted, laminated or veneered, and have good dimensional stability and load bearing capacity when properly designed. Howev r, the deformation and fra tur of such lem nts create malfunctions of structures made of MDF. This paper presents exp rimental results obtained for m de I and mode II fracture toughness. The fr ctur toughness tests were performed on Single Edge Notched Bend (SENB) specimen for mode I, respectively on Compact Shear (CS) specimens for mode II loading. Digital Image Correlation is applied in order to measure the displacement field evolution near the crack. © 2018 The Authors. Published by Elsevier B.V. P er-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Keywords: Particleboard; mixed mode loading; fracture toughness 1. Introduction Parti leboard (PB) are w od-bas composite with fin wood fib rs bound together by a small amount of polymeric adhesive, widely used in furniture industry and civil engineering, Beer et al. (2005). PB plates can be painted, laminated or veneered, and have good dimensional stability and load bearing capacity when properly designed, Beer et al. (2008). However, the deformation and fracture of such elements create malfunctions of structures made of PB. Most of the fracture studies were performed on wood Samarasinghe and Kulasiri ( 2000) Stanzl-Tschegg and Navi (2009), Murata et al. (2011), Danielsson (2013), Craciun et al. (2014), Franke and Quenneville (2014) and MDF © 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. IGF Workshop “Fracture and Structural Integrity” Mixed mode fracture toughness of particleboard

* Corresponding author. Tel.: +40-256-403577; fax: +40-256-403523. E-mail address: liviu.marsavina@upt.ro

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.2018.06.010 * 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 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. * Corresponding author. Tel.: +40-256-403577; fax: +40-256-403523. E-mail address: liviu.marsavina@upt.ro