PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 5 (2017) 99–106 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i ir t. tructural Integrity rocedia 00 (2017) 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Stress state analysis and optimization in the vicinity of the sensor of SMART-material V.P. Matveenko a , I.N. Shardakov b , N.A. Kosheleva a * , A.Yu. Fedorov a a Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm, 614990, Russia b Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science, 1 Akademika Koroleva str., 614013, Perm, Russia Abstract Composite materials in practical human activity are well positioned, and their range of applications is constantly expanding. Composite materials based on polymer are widely used among the different kinds of composite materials. The nomenclature of these materials is very wide and their properties are different from each other. For these reasons, the complex structure of the material and number of other factors, the traditional methods of assessing the strength and reliability of construstions from polymeric composite materials (PCM) should be complemented. In particular, by using new and effective monitoring systems. One of these modern methods of diagnostics is creation SMART-materials with embedded sensors. As a sensors the piezoelectric sensors or optical fibers are used. They can be located on the surface of the material or embedded in the polymer composite material. New methods of diagnostics products from these materials increase their competitiveness. Based on numerical modelling and experimental researches, the aim of the work is to search different ways of solving the problem, that allow to increase SMART material reliability as well as proper registration of the strain field, using the fiber-optic sensors and piezoelectric elements. The problems of the adhesive joint geometry optimization that appear while mounting sensitive elements on the PCM surface and designing optical fiber outputs were considered in this paper. The results of adhesive joint influence on sensors indications were shown. Besides, the stress-strain state analysis that includes the singular solutions for the points, where infinite stress may occur, was carried out in the framework of this study. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. tr t r l I t rit , I I , - t r , l, Ma ir , rt l . . atveenko a , I. . b , . . l a , . . a a er ational esearch olytechnic niversity, 29 o so olsky prospekt, er , 614990, ussia b Institute of ontinuous edia echanics of the ral ranch of ussian cade y of Science, 1 kade ika oroleva str., 614013, er , ussia str ct site aterials i ractical a acti it are ell sitioned, and their ra e f a licati s is c sta tl e a i . site aterials ase l er are i el se a t e iffere t i s f c site aterials. e e clat re f t ese aterials is er i e a t eir r erties are iffere t fr eac t er. r t ese reas s, t e c le str ct re f t e aterial a er f t er fact rs, t e tra iti al et s f assessi t e stre t a relia ilit f c str sti s fr l eric c site aterials ( ) s l e c le e te . I artic lar, si e a effecti e it ri s ste s. e f t ese ern et s of diagnostics is creation - aterials it e e e se s rs. s a se s rs t e iez electric se s rs r tical fi ers are used. They can be located on the surface f t e aterial r e e e i t e l er composite aterial. New methods f iagnostics r cts from these materials increase their competitiveness. Based on numerical modelling a e eri e tal researches, the aim of the work is to search different ways of solving the problem, that allow to increase T material reliabilit as ell as r er re istrati f t e strai fiel , si t e fi er- tic se s rs a iez electric ele e ts. e r blems f t e a esive joint geometry optimization that appear while mounting sensitive elements on the PCM surface and designing optical fiber outputs were considered in this paper. The res lts f a esi e j i t i fl e ce se s rs i icati s ere s . esi es, t e stress-strain state analysis that includes the singular solutions for the points, where infinite stress may occur, was carried out in the framework of this study. © 20 e t rs. lis ed lse ier .V. Peer-re ie er res si ilit f t e cie tific ittee f I I . © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 I t r ti l f r

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: Smart materials; fiber optic sensors; singularity; composite materials Keywords: Smart materials; fiber optic sensors; singularity; composite materials

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +7(342)2378308 E-mail address: nataly.kosheleva@gmail.com * orresponding author. el.: 7(342)2378308 - ail address: nataly.kosheleva g ail.co

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.074 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 2017 he uthors. ublished by lsevier . . eer-re ie er res si ilit f t e cie tific ittee f I I .