PSI - Issue 2_A

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 2 (2016) 2479–2486 Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2016) 000–000

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2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.310 ∗ Corresponding author. Tel.: + 7-383-330-7373 ; fax: + 7-383-330-6342. E-mail address: lapin@ict.sbras.ru; 2452-3216 c 2016 The Auth rs. Publi hed by Elsevier B.V. Pe r-review under responsibility of the Scientific Committee of ECF21. ∗ Corresponding author. Tel.: + 7-383-330-7373 ; fax: + 7-383-330-6342. E-mail address: lapin@ict.sbras.ru; 2452-3 16 c 2016 The Authors. Published by Elsevi r B.V. Peer-r view under responsibility of the Scientific Committee f ECF21. The development of unconventional oilfields is accompanied by the invention of new fluids with complex rheology (flocks, fibers, etc.). Herchel-Bulkley model is one of the most suitable models for such fluids. The advantage of this rheological law is that as its particular cases it includes simpler rheological models: from Newtonian and pseudoplastic fluids to the ones obeying the Bingham law. The latter two rheological models are often used in hydraulic fracturing ∗ Corresponding author. Tel.: + 7-383-330-7373 ; fax: + 7-383-330-6342. E-mail address: lapin@ict.sbras.ru; 2452-3216 c 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. 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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy 3D model of hydraulic fr cture with Hersch l-Bulkley compres ible fluid pumping Cherny S.G. a , Lapin V.N. a,b, ∗ a Institute of Computational Technologies SB RAS, 6, ac. Lavrentieva ave., Novosibirsk, 630090, Russia b Novosibirsk National Research State University, 2, Pirogova Str., Novosibirsk, 630090, Russia Abstract A fully-coupled 3D model of early stage of hydraulic fracture pr pa tion is enriched by incorporating two submodels for simu lation of fluid flow inside the fracture. The Herschel-Bulkley model is used to describe the flow of non-Newtonian fluid and the Reynolds equation is modified for compressible fluid flow simulation. Propagation of inclined hydraulically driven penny shaped fracture in the rock under multiaxial load is simulated. The influence of the fluid rheology and compressibility on the fluid pressure and the fracture form is shown. c 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: 3D model of fracture, hydraulic fracturing, Herschel-Bulkley fluid, compressible fluid 1. Introduction Hydraulic fract ring is the primary a d most e ff ective technique f r reservoir stimulation used in the petroleum industry. The objective of hydraulic fracturing is to improve the natural connection of the wellbore and the reservoir. Nearwellbore e ff ects play a key role in establishing this connection, and may have a big impact on performance of hydraulic fracturing treatment and its e ff ectiveness. Predicting hydraulic fracturing fluid performance and screenout frequency in the near-wellbore region is quite di ffi cult; many physical mechanisms are at play and few models are available for testing the various possible scenarios. In Shokin et al. (2015) fully 3D model of hydraulic fracture propagation is proposed. The main feature of the model that both wellbore influence and the distribution of fluid pressure into the fracture are taken into account. It allows to apply the model for simulation of early stage of fracture propagation with the near-wellbore e ff ects considered. The development of unconventional oilfields is accompanied by the invention of new fluids with complex rheology (flocks, fibers, etc.). Herchel-Bulkley model is one of the most suitable models for such fluids. The advantage of this rheological law is that as its particular cases it includes simpler rheological models: from Newtonian and pseudoplastic fluids to the ones obeying the Bingham law. The latter two rheological models are often used in hydraulic fracturing 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy 3D model of hydraulic fracture with Herschel-Bulkley compressible fluid pumping Cherny S.G. a , Lapin V.N. a,b, ∗ a Institute of Computational Technologies SB RAS, 6, ac. Lavrentieva ve., Novosibirsk, 630090, Russia b Novosibirsk National Research State University, 2, Pirogova Str., Novosibirsk, 630090, Russia Abstract A fully-coupled 3D model of early stage of hydraulic fracture pr pa tion is enriched by incorporating two submodels for simu lation of fluid flow inside th fr cture. The Herschel-Bulkley model is used to describe the flow of n n-Newtonian fluid and the Reynolds equation is modified for compressible fl id flow simulation. Propagation of incl ed hydraulically driven penny shaped fracture in the rock u der multiaxial load is simulat d. The influenc of the fluid rheology and c mpressibility on the fluid pressur and the fract re form is shown. c 2016 The Authors. Published by Elsev er B.V. Peer-r view nder responsibility of the Scientific Committee of ECF21. Keywords: 3D model of fracture, hydraulic fracturing, Herschel-Bulkley fluid, compressible fluid 1. Introduction Hydra lic fracturing is the primary and most e ff ective technique for reservoir stimulation used in the petroleum industry. The objective of hydraulic fracturing is to improve the natural connection of the wellbore and the reservoir. Nearwellbore e ff ects play a key role in establishing this connection, and may have a big impact on performance of hydraulic fracturing treatment and its e ff ectiveness. Predicting hydraulic fracturing fluid performance and screenout frequency in the near-wellbore region is quite di ffi cult; many physical mechanisms are at play and few models are available for testing the various possible scenarios. In Shokin et al. (2015) fully 3D model of hydraulic fracture propagation is proposed. The main feature of the mod l that both wellbore influence and the distribution of fluid pressure into the fracture are taken into account. It allows to apply the model for simulation of early stage of fracture propagation with the near-wellbore e ff ects considered. The development of unconventional oilfields is accompanied by the invention of new fluids with complex rheology (flocks, fibers, etc.). Herchel-Bulkley model is one of the most suitable models for such fluids. The advantage of this rheological law is that as its particular cases it includes simpler rheological models: from Newtonian and pseudoplastic fluids to the ones obeying the Bingham law. The latter two rheological models are often used in hydraulic fracturing 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy 3D model of hydraulic fracture with Herschel-Bulkley compressible fluid pu ping Cherny S.G. a , Lapin V.N. a,b, ∗ a Institute of Computational Technologies SB RAS, 6, ac. Lavrentieva ave., Novosibirsk, 630090, Russia b Novosibirsk National Research State University, 2, Pirogova Str., Novosibirsk, 630090, Russia Abstract A fully-coupled 3D model of early stage of hydraulic fracture propagation is enriched by incorporating two submodels for simu lation of fluid flow inside the fracture. The Herschel-Bulkley model is used to describe the flow of non-Newtonian fluid and the Reynolds equation is modified for compressible fluid flow simulation. Propagation of inclined hydraulically driven penny shaped fracture in the rock under multiaxial load is simulated. The influence of the fluid rheology and compressibility on the fluid pressure and the fracture form is shown. c 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: 3D model of fracture, hydraulic fracturing, Herschel-Bulkley fluid, compressible fluid 1. Introduction Hydraulic fracturing is the primary and most e ff ective technique for reservoir stimulation used in the petroleum industry. The objective of hydraulic fracturing is to improve the natural connection of the wellbore and the reservoir. Nearwellbore e ff ects play a key role in establishing this connection, and may have a big impact on performance of hydraulic fracturing treatment and it e ff ectiveness. Predicting hydraulic fracturing fluid performance and screenout frequency in the near-well ore region is quite di ffi cult; many physical mechanisms are at play and few models are available for testing the various possible scenarios. In Shokin et al. (2015) fully 3D model of hydraulic fracture propagation is proposed. The main feature of the model that both wellbore influence and the distribution of fluid pressure into the fracture are taken into account. It allows to apply the model for simulation of early stage of fracture propagation with the near-wellbore e ff ects considered. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). P r view under esponsibility of the Scientific Committee of ECF21. © 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