PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1324–1329 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Beam to column flange connection: from elasticity to destruction (theory and experiment) I.Shardakov 1 *, A.Shestakov 1 , M.Son 2 , A.Zemlanuhin 2 , G.Kashevarova 2 , I.Glot 1 a Institute of Continuous Media Mechanics Ural Branch of Russian Academy of Science, Perm, Russia b Perm National Research Polytechnic University, Perm, Russia Abstract Flange connections are the critical elements of metal structures, as they determine the whole structure rigidity and strength. In this paper, the results of experimental and theoretical studies are presented performed to evaluate the deformation behavior of the elements of metal beam-to-column flange connections. The experimental investigations were carried out on samples subjected to elastic and inelastic deformations up to their full failure. Displacements at the characteristic points of the samples were registered during the loading process. Relative deformations were measured at the points of stress and strain concentration. The data obtained at different scales accurately characterize the interrelations between the deformed elements, especially when the deformation becomes inelastic. The theoretical studies were concerned with the development of a mathematical model capable of providi an adequate description of elastic and i lastic stress- tr in states in the element of flange co necti ns. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: flange connection; failure, load-carrying capacity; monitoring; simulation; experiment 1. Introduction Flanged connections are important elements of metal structures. They largely determine rigidity and strength of structu s as a whol . Numerous studies have been devoted to the analysis of deformation state of the elements of flange joints in various constructive designs. The flange joint of a column and a beam can be implemented in various ways, Ghindea and Ballok (2015). Currently a large number of research projects are exploring the mechanical ECF22 - Loading and Environmental effects on Structural Integrity Beam to column flange connection: from elasticity to destruction (theory and experiment) I.Shardakov 1 *, A.Shestakov 1 , M.Son 2 , A.Zemlanuhin 2 , G.Kashevarova 2 , I.Glot 1 a Institute of Continuous Media Mechanics Ural Branch of Russian Academy of Science, Perm, Russia b Perm National Research Polytechnic University, Perm, Russia Abstract Flange connections are the critical elements of metal structures, as they determine the whole structure rigidity and strength. In this paper, the results of experimental and theoretical studies are presented performed to evaluate the deformation behavior of the elements of metal beam-to-colum flange conn ction . Th experimental investigations were carried out on samples subjected to lastic and inelastic deformations up to their full failure. Displacements at the characteristic points of the samples were registered during the loading process. Relative deformations w re me sured at the points of stress and strain concentration. The data obtained at different s ales accurat ly characterize th interrelations b twee the deformed elements, especially w n the deformation becomes inelastic. The theoretical studi s w re concerned with th development of a mathematical model capable of providing an adequate d scription of elastic and inela tic stress-strain states in the el ments of flange connections. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: flange connection; failure, load-carrying capacity; monitoring; simulation; experiment 1. Introduction Flanged connections are important elements of metal structures. They largely determine rigidity and strength of structures as a w ole. Numerous studies have been devoted to the analysis of deformation state of the elements of flange joints in various constructive designs. The flange joint of a column and a beam can be implemented in various ways, Ghindea and Ballok (2015). Currently a large number of research projects are exploring the mechanical © 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.: +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. * Corresponding author. Tel.: +7-342-237-8318; fax: +7-342-437-8487. E-mail address: shardakov@icmm.ru * Corresponding author. Tel.: +7-342-237-8318; fax: +7-342-437-8487. E-mail ad ress: shardakov@icmm.ru

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.2018.12.278