PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 68 –685 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity 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. ECF22 - Loading and Environmental effects on Structural Integrity Multiscale model of mechanical behavior of ceramics composite with soft matter filling based on movable cellular automaton Alexey Smolin a,b , Evgeny Shilko a,b , Anna Shalomeeva b * a Institute of Strength Physics and Materials Science SB RAS, pr. Akademicheskiy 2/4, Tomsk, 634055, Russia b Tomsk State University, pr. Lenina 36, Tomsk, 634050, Russia In this paper, movable cellular automaton method (MCA) is applied to the multiscale simulation of 3D samples of ceramics composite with soft matter filler. MCA is an efficient numerical method in particle mechanics, which assumes many-particle interaction among discrete elements and makes a feasible simulation of solid behavior including deformation, crack initiation and propagation, and further fragmentation of the material at different scales. The lowest scale of the proposed model corresponds to the characteristic size of the smallest pores/inclusions. Herein we start with modeling uniaxial compression of several representative ceramics samples with an explicit account of small pore randomly distributed in space. The results are the average values of Young's modulus, Poisso 's ratio, and strength, as well as the paramet rs of the Weibull distribution of these properties at the current scale. The data obtained allow us to describe the material behavior at th next scale were large cylindrical inclusions are considered explicitly, while the influence of small pores is accounted via the effective properties determined at the previous scale. The simulation results show that for each value of volume fraction of cylindrical soft inclusions there is no scattering of elastic modulus values while the scatter of strength and Poisson’s ratio values is significant. Random orientat ion of soft elongated inclusions results in higher streng th value and does not change Young’ s modulus of the model composites. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. © 2018 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Multiscale model of mechanical behavior of ceramics composite with soft matter filling based on movable cellular automat n Alexey Smolin a,b , Evgeny Shilko a,b , Anna Shalomeeva b * a Institute of Strength Physics and Materials Science SB RAS, pr. Akademicheskiy 2/4, Tomsk, 634055, Russia b Tom k State Un versity, pr. Lenina 36, Tomsk, 634050, Russia Abstract In this paper, movable cellular automaton method (MCA) is applied to the multiscale simulation of 3D samples of ceramics composite with soft matt r filler. MCA is an efficient numerical meth d in particle mechanics, which as u es many-p rticle interaction among discret elements and makes a easible si ulation of s lid behavior includi g deformation, crack initiation and prop gation, and further fragmentatio of the m terial at different scale . The lowest scale of the pr posed model corresponds to the ch ra teristic siz of the smallest pores/inclusions. Herein w start with modeling uniaxial co pression of several represent tive ceramics sampl s with an explicit a count of small pores randomly distributed in sp ce. The results are the average values of Young's odulus, P isson's atio, and strength, as well as the parameters of th Weibull distribution of these prop ties at the current scale. The data obtained allow us to describ the materi l behavior at the next cale were large cylind ical inclusions are considered explicitly, while the influence of small pores is accounted via the effective properties determined at the previous scale. The simulation results show that for each v lue of volume fraction of cylindrical soft inclusions there is no scattering of elastic modulus values while the scatter of strength and Poisson’s ratio values is significant. Random orientat ion of oft lo ated inclusions results in hig er str ng th value and does ot change Young’ s modulu of the model composit s. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: ceramic coposite; soft matter; mechanical behavior; strength; multiscale simulation Keywords: ceramic coposite; soft matter; mechanical behavior; strength; multiscale simulation

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 o ganizers. * Corresponding author. Tel.: +7-3822-286-975; fax: +7-3822-492-576. E-mail address: asmolin@ispms.tsc.ru * Corresponding author. Tel.: +7-3822-286-975; fax: +7-3822-492-576. E-mail ad ress: asmolin@ispms.tsc.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.2018.12.113