PSI - Issue 11

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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. ract structural beha h is probably ing underwent entions, the b lled to track th pattern allow analysis on th to the differen rties of the dif odel. Structur nt. The tensile rical results ar right © 2018 E review under r ords: masonry; c Dept. of Ci avior of a maso the outcome o several interve building is still e major cracks s the causes th e building also t construction p ferent material al analyses w stresses in so e used to propo lsevier B.V. A esponsibility o racking; ground nry farmhouse f different con ntions of conso heavily dama for a duration at originated th allows some g hases, and loc s into account, ere carried out me parts of the se simple retro ll rights reserve f the CINPAR settlements; finit exhibiting se nstruction phas lidation, includ ged, with verti n of 18 months e main faults, eometric anom ally weaken th was developed taking gravity building are f fitting strategie d. 2018 organizer e elements. A. Talierc g, Politecnico di veral faults is es; the oldest ding the additio cal and inclin : some were f including chan malies to be hig e structural str . The main cra loads, groun ound to be suf s s investigated. T part dates bac n of ties, a but ed deep cracks ound to be stil ges in geomet ghlighted. Thes ength. A detail cks existing in d settlements, ficiently high t 0133 (Italy) he building ha k to the seven tress, and micro . static mon l propagating. ry, to be better e anomalies can ed finite eleme n the building w and possible s o induce furthe s an irregular teenth century opiles. Despite itoring system Interpretation o r understood. A probably be t ent model, takin ere also includ seismic actions er crack growth plan, . The these m was f the n in raced ng the ed in into . The Copyright © 2018 Elsevier B.V. All rig ts reserved. Peer-review under responsibility of the CINPAR 2018 organizers Abst The w ic build interv insta crack depth back prope the m accou nume Copy Peer Keyw ract structural beha h is proba ly ing underwent entions, th b lled to track th pattern allow analysis on th to the differen rties of th dif odel. Structur nt. The tensile rical results ar right © 2018 E review under r ords: masonry; c Dept. of Ci vior of a maso the outcome o several interve uilding is still he major cracks s the causes th e building also t construction p fere t material al a alyses w stresses in so e us d to propo lsevier B.V. A esponsibility o racking; ground nry farmhouse f different con ntions of conso heavily dama for a duration at originated th allows some g hases, and loc s into account, ere carried out me parts of the se simple retro ll rights reserve f the CINPAR settlements; finit exhibiting se struction phas olidation, includ ge , with verti of 18 months he main faults, o etric anom ally weake th was d veloped t king gravity building are f fitting strategie d. 2018 organizer e elements. A. Talierc g, Politecnico di veral faults is es; the oldest ing the additio ical and inclin s: some were f including chan malies to be ig he structural str . The main cra loads, groun ound to be suf s s investigated. T part dates bac n of ties, a but ed deep cracks oun to be til ges in geomet hlighted. Thes rengt . A detail cks existing in d settlements, ficiently high t 0133 (Italy) he building ha k to the seven tress, and micro . A static mon l propagating. ry, to be better e anomalies can d finite eleme the building w and possible s o induce furthe s an irregular nteenth c ntury piles. Despite nitoring system Interpretation o understood. A n probably be t nt model, takin were also includ ismic actions r crack growth plan, . The these m was f the n in raced g the ded in into . The Abst The whic build interv insta crack depth back prope the m accou nume Copy Peer Keyw

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

2452 Peer-r 2452 Peer-r * C E * C E 3216 Copyright evi w u er resp 3216 Copyright eview under resp Corresponding aut -mail address: al orresponding aut E-mail ad ress: al

B.V. All rights re CINPAR 2018 o B.V. All rights re CINP R 2018 o -23994241; fax: olimi.it -23994241; fax: olimi.it

+39-02-2399430 +39-02-2399430

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served. rganizers. served. rganizers.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt

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