PSI - Issue 6

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 292–30 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 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. Copyright © 2017 The Authors. Published by Elsevier B.V. Pe r-r view und r responsibility of the MCM 2017 organizers. Analytic Modelling for Wellbore Stability Analysis Martemyanov A. ª *, Lukin S. ª , Ovcharenko Yu. ª , Zhukov V. ª, Andrianov Yu. ᵇ , Vereshchagin S. ᵇ , Eremeev A. ᵇ , Konchenko A. ᵇ , Tatur O. ᵇ , Yuferova A. ᵇ ª Gazpromneft Science & Technology Centre, Geomechanics Unit, 75-79 liter D Moika River emb., 19000, St Petersburg, Russian-Federation ᵇ Schlumberger, Leningragskoe highw y, 16 liter А, line. 3, 125171, Moskow, Russian-Federation Abstract 1D geomech nical model b sed on cross-dipole wideband acoust logging for unconventional reservoir is calculated. TIV anisotropic zones were highlighted and corresponding anisotropic elastic properties were confirmed by core samples tests. Final minimal stress profile was calibrated on the data set including log and laboratory studies, drilling and hydrofracturing. Calibrated model was used to optimize frac design for multiple hydrofracing in the horizontal wells. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: numerical simulation, geomechanics, hydraulic fracturing, refracturing, pore pressure, coupled simulation, principal stress reorientation, micro-seismic observation Introduction The textural anisotropy of mechanical properties long time has been considered as negligible and didn't take into account by geophysicists in seismic and acoustic logging data interpretation. Despite the fact that nearly 30 years ago L. Thomsen [1] proposed a simple method of mathematical description of transversely isotropic medium with vertical axis of symmetry (TIV), in practice it is still rather difficult to make estimation of rock properties anisotropy. However, the worldwide unconventional shale reservoirs development trend demonstrated the need to take TIV-anisotropy into account because of its significant influence on hydraulic fracturing procedure design. On XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Analytic Modelling for Wellbore Stability Analysis Martemyanov A. ª *, Lukin S. ª , Ovcharenko Yu. ª , Zhukov V. ª, Andrianov Yu. ᵇ , Vereshchagin S. ᵇ , Er meev A. ᵇ , Konche ko A. ᵇ , Tatur O. ᵇ , Yuferova A. ᵇ ª Gazpromneft Science & Technology Ce tre, Geom c anics Unit, 75-79 liter D Moika River emb., 19000, St Pet sburg, Russian-Federation ᵇ Schlumberger, Leningragskoe highway, 16 liter А, line. 3, 125171, Moskow, Russian-Federation Abstract 1D geomechanical model based on cross-dipole wideband a oustic logging for unconventional reservoir is calculated. TIV anisotropic zones were highlighted and corresponding anisotropic elastic properties w re confirmed by core samples tests. Final inimal stre s pr file was calibrated on the data set including log and lab rat ry studies, drilling and hydrofracturing. Calibrated model was used to optimize frac design for multiple hydrofracing in the horizontal wells. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: numerical simulation, geomechanics, hydraulic fracturing, refracturing, pore pressure, coupled simulation, principal stress reorientation, micro-seismic observation Introduction The textural anisotropy of mechanical properties long time has been considered as negligible and didn't take into account by geophysicists in seismic and acoustic logging data interpretation. Despite the fact that nearly 30 years ago L. Thomsen [1] propose a simple method of mathematical description of transversely isotropic medium with vertical axis of symmetry (TIV), in pract e it is still rather difficult to ake estimation of rock properties anisotropy. However, the worldwide unconventional shale reservoirs development trend demonstrated the need to take TIV-anisotropy into account because of its significant influence on hydraulic fracturing procedure design. On © 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. XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017)

* Corresponding author. Tel.: +7-960-262-2798 E-mail addresses: st021087@student.spbu.ru * Correspon ing author. Tel.: +7-960-262-2798 E-mail addresses: st021087@student.spbu.ru

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th 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.2017.11.045