PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Available online at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 13 (2018) 1159–1164 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural I t gri y Procedia 00 (2018) 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. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Thermo-Mechanical Model of Steam Injection in Porous Media A. Kostina*, M. Zhelnin, O. Plekhov Institute of continuous media mechanics of the Ural branch of Russian academy of science, Ac.Koroleva st.,1, Perm, 614013, Russia Abstract The work is devoted to the development of a coupled thermo-mechanical model of a steam injection effect on a stress-strain state and failure of a reservoir. Steam assisted gravity drainage method is widely used for a heavy oil recovery. Injection of the hot steam significantly alters the temperature of the reservoir, which, in turn, can induce failure of the formation and surrounding rock. Therefore, the accurate simulation of this process should include simultaneous consideration of a mechanical (plastic deformation and failure) and physical (phase transition) p ocesses. The main feature f the p opos thermo-mechani al model is introduction of an additional parameter characterizing evolution of the structural defects in the considered media. A three-dimensional numerical simulation of the steam injection into a sandstone reservoir demonstrates application of the proposed model. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: SAGD; mesoscopic defects; porous media; thermo-mechanical coupling 1. Introduction S eam ssisted gr vity drainage (SAGD) is one of th effective ways to enhance recovery o the crude oil. When the hot steam is injected into the reservoir, the viscosity of the oil reduces, the oil mobility increases, which results in the high values of the recovery factor. Theoretical consideration of all processes accompanying SAGD is rather complicated problem. Uribe-Patino et al. (2017) have pointed out that high temperature values (more than 180 0 C) have a significant influence on the stress-strain state of the reservoir and leads to the large volume strains and thermal stresses, which can produce shear or tensile stresses, near the wellbore. Furthermore, the temperature changes can affect the permeability of the reservoir by two different ways. If the confining pressure is high then the heating reduces the permeability due to the contraction of the soil. In case when a dilation (or fracture) occurs the permeability can ECF22 - Loading and Environmental effects on Structural Integrity Thermo-Mechanical Model of Steam Injection in Porous Media A. Kostina*, M. Zhelnin, O. Plekhov Institute of continuous media mechanics of the Ural branch of Russian academy of science, Ac.Koroleva st.,1, Perm, 614013, Russia Abstract The work is devoted to the development of a coupled thermo-mecha ical model of a st am injection effect on a stress-strain state and failure of a res rv ir. Steam assisted gravity drainage ethod is widely used f r a heavy oil recovery. Injection of the hot ste m significantly alters the temperature of the reservoir, which, in turn, can induce failure of the formation and surrounding rock. Therefore, the accurate si ulation of this proc ss should include simultaneous consideration of a mechanic l (plastic deformation and failure) and physical (phase transition) processes. The main feature of the propos d thermo-mechanical model is intr ducti of an additional a eter c racterizing evolution of the structural defe ts in th considered media. A three-di ensional numerical simul tion f the steam injection into a sandstone reservoir demonstrates application of the proposed model. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: SAGD; mesoscopic defects; porous media; thermo-mechanical coupling 1. Introduction Steam assisted gravity drainage (SAGD) is on of the eff ctive ways to enhance recovery o the crude oil. When the hot steam is injected into the reservoir, the viscosity of the oil reduces, the oil obility increases, which results in the high values of the recovery factor. Theoretical consideration of all processes accompanying SAGD is rather complicated problem. Uribe-Patino et al. (2017) have pointed out that high temperature values (more than 180 0 C) have a significant influence on the stress-strain state of the reservoir and leads to the large volume strains and thermal stresses, which can pr duce shear or tensile stresses, near the wellbore. Furthermore, the temperature changes can affect the permeability of the reservoir by two different ways. If the confining pressure is high then the heating reduces the permeab lity due to the contraction of th soil. In case when a dilation ( r fracture) occurs the permeability can © 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. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 organizers. * Corresponding author. Tel.: +7-342-237-8312; fax: +7-342-237-8487. E-mail address: kostina@icmm.ru * Corresponding author. Tel.: +7-342-237-8312; fax: +7-342-237-8487. E-mail ad ress: kostina@icmm.ru

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

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.241