PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedirect.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 475–482 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity 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 Statistical correlation between the printing angle and stress and strain of 3D printed models R Mitrović a , Ž Mišković a,* , M Ristivojević a , A Dimić a , J Danko b , J Bucha b , T Milesich b a University of Belgrade – Faculty of Mechanical Engineering, Kraljice Marije 16, Belgrade 11000, Serbia b Institute of Transport Technology and Designing, Faculty f Mechanical Engineering, Slovak University of Technology in Bratislava, Slovakia, Nam. Slobody 17, 812 31 Bratislava, Slovakia Abstract In the strides of the most advanced technological achievements, the use of polymers is becoming increasingly evident both in everyday life and in engineering practice. Complex structures made of polymers attract more attention from scientists and researchers, as their application increases in the most diverse fields of science. This phenomenon requires constant improvement of knowledge and technologies for the production of polymeric structures and parts, but it is equally important to establish reliable databases on the behavior of newly-introduced materials under different load conditions. This work is based on the establishment of statistical correlation between parameters of 3D printed models and their mechanical characteristics in conditions of static axial loading. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords:Rapid prototyping; 3D printing;statistical correlation, stress and strain. 1. Introduction The constant improvement of the process of constructing machine parts, which has the aim to reduce the costs of production and maintenance, shortening the downtime and time necessary for the development of a new product, while simultaneously increasing productivity and reliability, which often entails the use of new materials. The most commonly used engineering materials of today are metals and metal alloys, ceramics, polymers, etc. © 2018 The Authors. P blished by Elsevier B.V. Peer-review und responsibility of the ECF22 organiz rs. ECF22 - Loading and Environmental effects on Structural Integrity Statistical correlation between the printing angle and stress and strain of 3D printed models R Mitrović a , Ž Mišković a,* , M Ristivojević a , A Dimić a , J Danko b , J Bucha b , T Milesich b a University of Belgrade – Faculty of Mechanical Engineering, Kraljice Marije 16, Belgrade 11000, Serbia b Institute of Transport T chnol gy and D signing, Faculty of Me hanical Engineering, Slov k University of T chnology in Bratislava, Slovakia, Nam. Slobody 17, 812 31 Bratislava, Slovakia Abstract In the strides of the most advanced technological achievem nts, the use of polymers is becoming increasingly evident both in everyday life and in engineeri g practice. Complex structures made of polymers attract more attention from sci tists and researchers, as their application incre ses in the ost diverse fields of science. This phenomen n requires constant improvement of knowledge and technologies for the production of polymeric structures a d parts, but it is equally important to establish reliable databases on the behavi r of newly-introduced materials under different loa conditions. This work is based on the establishment of statistical correlation between parameters of 3D printed models and their mechanical characteristics in conditions of static axial loading. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords:Rapid prototyping; 3D printing;statistical correlation, stress and strain. 1. Introduction The constant improvement of the process of constructing machine parts, which has the aim to reduce the costs of production and maintenance, shortening the downtime and time necessary for the development of a new product, while simultaneously increasing productivity and reliability, which often entails the use of new materials. The most commonly used engineering materials of today are metals and metal alloys, ceramics, polymers, etc. © 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. E-mail address: zmiskovic@mas.bg.ac.rs. * Corresponding author. E-mail ad ress: zmiskovic@mas.bg.ac.rs.

* 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 organizers.

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.2018.12.079