PSI - Issue 6

ScienceDirect Available online at www.sciencedirect.com Available o line at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 101–108 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2017) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/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. Copyright © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. FundamentalsofStaticandDynamicFracture (MCM 2017) Methods of calculation of soil stress-strain distribution in sheet pile corset KondratievaL.N., PopovV.M., MedvedskyP.Ye.* St. Petersburg State University of Architecture and Civil Engineering, 2nd Krasnoarmeyskaya Str., 4, St. Petersburg, 190005, Russia. Abstract Methodology of calculation of soil stress-strain distribution in sheet pile corset has been developed. Issues regarding calculation of closed pile sheeting which is used for stabilization of soil behavior in building structure footing have been addressed. Effect of sheet pile corset on stress and strain distributio in so l body has been analyzed. Soil body settlement and strain conditions (w th / without corset) calculated by analytical approach and by finite elements methodhave been compared. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: calculation methods, sheet pile corset, stress-strain distribution, settlement, coefficient of friction. In the construction process of new or re-construction of existing buildings it is necessary to consider the impact produced by new construction activities on the surrounding built-up environment. One of efficient ways to stabilize soil behavior in building structure footing is closed pile sheeting provided in the form of corset. Sheet pile corset is designed to localize the stress distribution area and thus reduce settlements occurring outside its boundaries. Therefor , su h confining element allows reducing impact of facility under erection on existing buildings. Whil calculating the footing deformation with refe e ce to strain conditions it is necessary to take into account variation of footing design and limit strains caused by soil behavior stabilization activitiesMangushev, R.A.and Nikiforova,N.S. (2017). Existing normative and technical documents contain no recommendations regarding calculation of str ss-strain distribution in soils restrained by sheet pile corset; therefore such issue may be considered a hot topic. XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. FundamentalsofStaticandDynamicFracture (MCM 2017) Methods of calculation of soil stress-strain distribution in sheet pile corset KondratievaL.N., PopovV.M., MedvedskyP.Ye.* St. Petersburg State University of Architecture and Civil Engineering, 2nd Krasnoarmeyskaya Str., 4, St. Petersburg, 190005, Russia. Abstract Methodology of calculation of soil stress-strain distributi n in sheet pile corset has been developed. Issues regarding calculation of closed pile sheeting which is used for stabilization of soil behavior in building structure footing have been addressed. Effect of sheet pile corset on stress and strain distribution in soil body has bee analyzed. Soil ody settlem nt and strain conditions (with / without corset) calculated by analytical approach and by finite elements methodhave been compared. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: calculation methods, sheet pile corset, stress-strain distribution, settlement, coefficient of friction. In the construction process of new or re-construction of existing buildings it is necessary to consider the impact produced by new construction activities on the surrounding built-up enviro ment. One of efficient ways to stabilize soil behavior in building structure footing is close pile sheeting provided in the form of corset. Sheet pile corset is designed to localize the stress distribution area a d thus reduce settlements occurri g outside its boundaries. Therefore, such c nfining element allows reducing impact of facility under erection on existing buildings. While calculating the footing deformation with reference to strain conditions it is necessary to take into account variation of footing d sign and limit strains caused by soil be avior stabilization activitiesMangushev, R.A.and Nikifo o a,N.S. (2017). Existing normative and technical documents contain no rec mmendations regarding calculation of stress-strain distribution in soils restrained by sheet pile corset; therefore such issue may be conside ed a hot topic. © 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. E-mail address: kondratjevaln@yandex.ru * Correspon ing autho . E-mail address: kondratjevaln@yandex.ru

* 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 MCM 2017 organizers. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers.

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 10.1016/j.prostr.2017.11.016