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 P o edi Structural Integr ty 6 (2017) 56–63 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. ublishe by Elsevier B.V. Peer-review under responsibility of 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) Stress Concentrations in Composites with Microvascular Channels Hamed Tanabi a *,Ahmed Al Shawk b , Baris Sabuncuoglu c a Mechanical Engineering Department, University of Turkish Aeronautical Association, Ankara, Turkey b Graduate School of Natural and Applied Sciences, University of Turkish Aeronautical Association, Ankara, Turkey c Mechatronic Engineering Department, University of Turkish Aeronautical Association, Ankara, Turkey Abstract Microvascular chann ls in fiber-reinforced composites off r various functionaliti s ranging from self-healing and damage monitoring, to active thermal management. However, the tradeoff between extended functionalities and mechanical performance at vascularized composites is still an issue. In this study, a three dimensional finite element model is developed to investigate the stress concentrations generated around macro-vascular channels for various channel configurations and lamination sequences. Results indicate that the stress distribution around vascular channel is same for symmetric stacking configurations spite of having different layer just above the channel and different resin pocket dimensions. The effect of changing the vascule diameter is mostly observed in UD 0 configuration. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Finite element; vascular channel; fiber reinforced composites 1. Introduction Introduction of microvascular channels embedded within fiber reinforced composites offers the potential for significant developments in functionality. For instance, these channels can be used for thermal management and active cooling of composite laminates (Aragón et al., 2007; Kozola et al., 2010) . Patrick et al. (Patrick et al., 2014) XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Stress Concentrations in Composites with Microvascular Channels Hamed Tanabi a *,Ahmed Al Shawk b , Baris Sabuncuoglu c a M chanical Engineering Department, University of Turkish Aeronautical Association, Ankara, Turkey b Graduate Sch ol of Natural and A plied Sciences, University of Turkish Aeronautical Ass ciation, Anka a, Turkey c Mechatronic Engineering Department, University of Turkish Aeronautical Association, Ankara, Turkey Abstract Microvascular channels in fiber-reinforced composites offer various functionalities ranging from self-healing and damag monitoring, to active thermal man gement. However, the trad off betwee extended functionalities and mechanical p rformanc at vascularized composites is still an issue. In this st dy, a thre dimensional finite eleme t model is developed to investigate the stress co centrations generated around macro-vascular channels for various channel configurations and l mi ation sequences. Results indicate that the stress distributio around vascular channel is same for symm tric stacking co figurations spite of having different lay r just above the channel and differ nt resin pocket dimensions. The eff ct of changing the vascule diameter is mostly observed in UD 0 configuration. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Finite element; vascular channel; fiber reinforced composites 1. Introduction Introductio of icrovascular channels embedded within fiber reinforced composites offers the potential for significant developments in functionality. For instance, these channels can be used for thermal management and active cooling of composite laminates (Aragón et al., 2007; Kozola et al., 2010) . Patrick et al. (Patrick et al., 2014) © 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 au hor. Tel.:+90-553-222-3813; fax: +90-312-342-8460. E-mail address: htanabi@thk.edu.tr * Corresponding author. Tel.:+90-553-222-3813; fax: +90-312-342-8460. E-mail address: htanabi@thk.edu.tr

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.2017.11.009