PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 2742–2749 Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Probabilistic Approach for Analysis of Str ngth of Ceramics With Different Porous Structure Based on Movable Cellular Automaton Modeling A.Yu. Smolin a *, I.Yu. Smolin b , I.Yu. Smolina c a Institute of Strength Physics and Materials Science SB RAS, pr. Akademicheskiy 2/4, 634055, Tomsk, Russia b Tomsk State University, pr. Lenina 36, 634050, Tomsk, Russia c Tomsk State University of Architecture and Buildin , Solyanaya sq., 2, 634003, Tomsk, Russia Abstract Movable cellular automaton method which is a computational method of particle mechanics is applied to simulating uniaxial compression of 3D porous ceramic specimens. Pores were considered explicitly by removing automata selected randomly from the original fcc packing. Distribution of pores in space, their size and the total fraction were varied. For each values of porosity there were generat d several r presented specim ns with individual pore position in space. The resulting values of elastic modulus and stren t of the specimens were sc ttered and well described by th Weibull dist ibution. We showed hat to reveal dep ndence of th elastic and str ngth pr p rties on porosity it is much better to consider not average of the values f r the specimens of t e same porosity, ut the mat em ical expectation o the corresponding Weibull istri ution. It is shown that relation betwe n mechanical properties of the material and its porosity depends signifi antly on pore st ucture. Namely, percolation transition from closed porosity to interconnected pores strongly manifests itself on stre gth dependence on porosity. Thus, the curve of strength versus porosity fits different equations for different kind of pore structure. Composite ceramics which pores are filled by plastic filler shows the similar behavior. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Probabilistic Approach for Analysis of Strength of Ceramics With Different Porous Structure Based on Movable Cellular Automaton Modeling A.Yu. Smolin a *, I.Yu. Smolin b , I.Yu. Smolina c a Institute of Strength Physics and Materials Science SB RAS, pr. Akademicheskiy 2/4, 634055, Tomsk, Russia b Tomsk State University, pr. Lenina 36, 634050, Tomsk, Russia c Tomsk St te Un v rs ty of Architect r and Building, Solyanaya sq., 2, 634003, Tomsk, Russia Abstract Movable cellular automaton method which is a computational method of particle mechanics is applied to simulating uniaxial compression of 3D p rous ceramic specimen . Pores were consid red explicitly by removing automata selected r ndomly from the original fcc packing. Dist ibution of pore in space, th ir size an the total fraction were v ried. For ach values f porosity re were gener ted several represented specimens with individual pore position in space. The resulting values of ela tic mod lus and str ngth of the specimens were s attered and well described by the Weibull distribution. We sh wed that to reveal dependence of t e elastic and stre gth properties on porosity it is much be t r to consi er n t averag of th valu s for the specimens of the same porosity, but the mathematical expectation of the corresponding Weibull distribution. It is shown that relat on b twe n mechanical properties of th material and its por sity d pends si nificant y on pore structure. Namely, p rcolation transition from closed po osity to inter on ecte pores s rongly manifests itself on trength dep nden on porosit . Thus, the cu ve of strength ver us po i y fits differe t equatio s for different kind of pore struc ure. Com osit c ramics wh ch pore ar filled by plastic fill shows the similar behavior. © 2016 The Authors. Published by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access rti le under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21.

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Ceramics; pore structure; elastic modulus; strength; simulation; Weibull analysis Keywords: Ceramics; pore structure; elastic modulus; strength; simulation; Weibull analysis

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 © 201 6 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 2452-3216 © 201 6 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +7-3822-286-975; fax: +7-3822-492-576. E-mail address: asmolin@ispms.tsc.ru * Corresponding author. Tel.: +7-3822-286-975; fax: +7-3822-492-576. E-mail ad ress: asmolin@ispms.tsc.ru

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.342