PSI - Issue 6

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 6 (2017) 109–114 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

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 f the MCM 2017 organizers. XXVII International Conference ―Mathematical and Computer Simulations in Mechanics of Solids and Structures‖. Fundamentals of Static and Dynamic Fracture (MCM 2017) Kinetics theory of shock-induced structural heterogenization Yurii Meshcheryakov* Institute of Problems of Mechanical Engineering RAS, Saint-Petersdur, 199178, Russia Abstract In considering the shock wave propagation in solid, instead of traditional constitutive equation, the lockingof balance equations is conducted by using the mesoparticle velocity distribution function. In this approach, the dynamically deformed material is considered to be the stochastic medium and the particle velocity and velocity dispersion are determined as the first and second statistical moments of distribution function. Meso-macro- energy exchange is found to be realized through change of the particle velocity dispersion – the second moment of distribution functi n. The criter on for transition from evolutional regime of meso macro energy exchange to heterogenization is found to be determined by the ratio of rate of change the velocity dispersion and particle velocity acceleration. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: shock wave; particle velocity; dispersion; velocity variance; time of relaxation; macro-meso energy exchange XXVII International Conference ―Mathematic l and Computer Simulations in echanics of Solids and Structures‖. Fundamentals of Static and Dynamic Fracture (MCM 2017) Kinetics theory of sh ck-induced structural heterogenization Yurii Meshcheryakov* Institute of Problems of Mechanical Engineering RAS, Saint-Petersdur, 199178, Russia Abstract In sidering the hock wave propagation in soli , instead of traditio al constitutive equation, the lo kingof balance equation is conducted by using t e mesoparticle velocity distributi n function. In his a p oach, the dynamically deformed material is considered t b the stochastic medium a d th parti le v locit and velocity dispersion a det rmined as t e first and second statistical mom nts of distributio functio . Meso-macr - e gy ex hange is found o be realized through chang of the particle velocity dispersion – the second moment of distributi n func ion. The criterion f r transiti n from volutional reg m of meso macro en rgy exchange o heterogenization is found to be determined by the ratio of rate of change the velocity dispersion and particle velocity acceleration. © 2017 The Autho s. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: shock wave; particle velocity; dispersion; velocity variance; time of relaxation; macro-meso energy exchange

© 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 © 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. * Correspon ing author. Tel.: +7-812 — 321-4765; fax: +7-812 — 321-4771. E-mail address: ym38@mail.ru * Corresponding author. Tel.: +7-812 — 321-4765; fax: +7-812 — 321-4771. E-mail address: ym38@mail.ru

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.2017.11.017