PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 614–619 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

www.elsevier.com/locate/procedia .elsevier.co /locate/procedia

www.elsevier.com/locate/procedia

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 Conditions for Long-term Monitoring of Safety in Operation of Pipelines Garan Martin a , Chmelko Vladimír b ,* a Slovak University of Technology, Faculty of Mechanical Engineering, Institute of applied mechanics and mechatronics, Námestie slobody 17, 812 31 Bratislava, Slovak republic b Faculty of Mechanical Engineering, Regional T echnological Institute, University of West Bohemia, Univerzitní 22, 306 14 Plzeň , Czech republic Abstract The safety of the high-pressure pipeline systems can negatively affect occurrence of non-standard operational states. This can primarily occur in operation of turbo-compressors at the compressor stations, where we can expect an unwanted vibrating due to existence of the dynamic loading. Let us have another case, the line parts of such pipelines, where the walls could sometimes be weakened by the unwanted corrosion defects. In both cases, the safety of operation can be exposed by additional bending loading of the pipeline e.g. due to decreasing of sub-soil. In this contribution will be intr duced monitoring systems which can monit r such negative events in a real time. More closely will be explained selection of suitable sensors and their deployment along the critical place as well as evaluation of measured data and conditions for valuation of the operational safety. Furthermore, there will be presented results obtained from measurements of existing real monitoring systems of safety for given pipeline systems. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: health monitoring; fatigue; vibration; corrosion tr t r l I t rit , I I , - t r , l, ir , rt l ti a , l l i í , a Slovak niversity of echnology, aculty of echanical ngineering, Institute of applied echanics and echatronics, á estie slobody 17, 812 31 Bratislava, Slovak republic b aculty of echanical ngineering, egional echnological Institute, niversity of est ohe ia, niverzitní 22, 306 14 lzeň , zech republic bstr ct e safet f t e i - ress re i eli e s ste s ca e ati el affect cc rre ce f -sta ar erati al states. is ca ri aril cc r i erati f t r -c ress rs at t e c ress r stati s, ere e ca e ect a a te i rati e t e iste ce f t e a ic l a i . et s a e a t er case, t e li e arts f s c i eli es, ere t e alls c l s eti es e ea e e t e a te c rr si efects. I t cases, t e safet f erati ca e e se a iti al e i l a i f t e i eli e e. . e t ecreasi f s -s il. I t is c tri ti ill e i tr e it ri s ste s ic ca it r s c e ati e e ts i a real i e. re cl sel ill e e lai e selecti f s i a le se s rs a t eir e l e t al t critical lace as ell as e al ati f eas r ata a c iti s f r al ati f t e erati al safet . rt er re, t ere ill e rese te r s lts tai e fr eas re e ts f e isti real it ri s ste s f safet f r i e i eli e s ste s. e t rs. lis e lse ier . . eer-re iew under resp sibility of the Scientific Committee of ICSI 2017. Keywords: health monitoring; fatigue; vibration; corrosion © 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

1. Introduction 1. Introduction

© 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. The most failure of structures causes a change in operating conditions with the exception of the human factor. It is obvious that t e operational loa ing for which the structure was projected may change. In the case of gas and oil pipelines, it could be the quasi-static loading with the varied internal pressure involved by operating medium. This st f il r f str t r s s s i r ti iti s it t ti f t f t r. It is i s t t t ti l l i f r i t str t r s r j t . I t s f s il i li s, it l t si-st ti l i it t ri i t r l r ss r i l r ti i . is

* Corresponding author. Tel.: +421 57296225. E-mail address: vladimir.chmelko@stuba.sk * orresponding author. el.: 421 57296225. E-mail address: vladimir.chmelko@stuba.sk

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.2017.07.026 * 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 The Authors. Published by Elsevier B.V. eer-re ie er res si ilit f t e cie tific ittee f I I .