PSI - Issue 5

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 Structu al Integrity 5 (2017) 928–934 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i ir t. i i 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 Fatigue lifetime improvement in AISI 304 stainless steel due to high-density electropulsing G. Lesiuk a *, Z. Zimniak b , W. Wiśniewski a , J.A.F.O. Correia c a Faculty of Mechanical Engineering, Department of Mechanics, Materials Science and Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50- 370 Wrocław, Poland b Faculty of Mechanical Engineering, Department of Metal Forming and Metrology , Wrocław University of Science and Technology, Łukasiewicza 5 , 50- 370 Wrocław, Poland c INEGI/Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal The pu pose of the study was to investigate the effect of the use of high density pulsed current (using supercapacitor) on the fatigue life of the tested specimens. For this purpose, experimental analyses were carried out for a two group of samples: without current pulsat on and after current exposure. The r sults of the study for AISI 304 steel (0.04% C, 1.2% Mn, 18.16% Cr, 8% Ni, 0.335% Mo, 0.041% Si) fo fatigue strength were presented. The experiments we e performed on single edge notch d tensile specimen (SENT) with U-shaped lectro-drilling ( W = 15mm, t = 0.5 m, a 0 = 2.5mm). Positive current pulses with different durations and frequencies were used. The tests were carrie out on a hydraulic pulsator MTS 810, controlled by a constant force amplitude F max = 1100N. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: AISI 304 steel; fatigue; high-density electropulsing; fatiguelifetime improvement. tr t r l I t rit , I I , - t r , l, ir , rt l . i a , . i i , . i i i a , . . . . i c a aculty of echanical ngineering, epart ent of echanics, aterials Science and ngineering, rocła niversity of Science and echnology, S olucho skiego 25, 50- 370 rocła , oland b aculty of echanical Engineering, epart ent of etal or ing and etrology , rocła niversity of Science and echnology, ukasie icza 5 , 50- 370 rocła , oland c I I/ aculty of ngineering, niversity of orto, ua r. oberto rias, 4200-465 orto, ortugal str ct e r se f t e st as t i esti ate t e effect f t e se f i e sit lse c rre t ( si s erca acit r) t e fati e life f t e teste s eci e s. r t is r se, e eri e tal a al ses ere carrie t f r a t r f sa les: it t c rre t lsati a after c rre t e s re. e res lts f t e st f r I I steel ( . , . , . r, i, . , . i) f r fati e stre t ere rese te . e e eri e ts ere erf r e si le e e tc te sile s eci e ( ) it -s a e lectr - ril i ( , t . , 0 . ). siti e c rre t lses it iffer t rati s a fre e cies ere se . e tests ere carrie t a r lic lsat r , c tr lle a c st t f rce a lit e ax . e t rs. lis e lse ier . . Peer-review under responsibilit f the cie tific ittee f I I . ey ords: I I 304 steel; fatigue; high-density electropulsing; fatiguelifeti e i prove ent. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 Abstract 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. 1. Introduction 1. I t duction

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. The issue of the impact of external mag etic and electric fields on mechanical response of a material is named as the effect of cross fields. The most popular and developed issues of that type is, among others, the magneto- i l r s s f t ri l is s t ff t f r ss fi l s. st l r l iss s f t t t is, t rs, t t - iss f t i t f t r l n ti l tri fi l s

* Corresponding author. Tel.: +48 713203919; fax: +48 713211235. E-mail address: Grzegorz.Lesiuk@pwr.edu.pl * orresponding author. el.: 48 713203919; fax: 48 713211235. - ail address: rzegorz. esiuk p r.edu.pl

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.2017.07.118 * 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 .