PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 456–46 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 Model analysis of complex structures – advantages of physical sub scaled model testing and shortcomings in physical model production Ana Petrovi ć a * , Taško Man ski a , Dragan Ignjatovi ć b , Nataš a Trišović a , Ines Grozdanović b , Wei Li c a Faculty of Mechanical Engineering, 11120 Belgrade, Serbia b Faculty of Mining and Geology, 11120 Belgrade, Serbia c Xi'an Jiaotong University, Xi'an, China Abstract The possibilities of testing real constructions strength are often limited, especially in case of large constructions. Testing on the model, instead of the actual construction, results in a great saving of money and time. Sub-scaled model of the construction of the substructure, the slewing platform and the lower part of the pylons of the bucket wheel excavator SchRs630 is made. Numerical calculations (using Finite Element Method) and experimental testing of the model were performed. Experimental testing is performed using classical strain gauge method and Digital Image Correlation Method (Aramis system). Once again, advantages of Digital Image Correlation method compared to classical measurem nt methods are confirmed. The negative impact f conventional manufacturing methods in some zon s is noti ed. © 2018 The Authors. Published by Elsevier B.V. Peer-review und r responsibility of the ECF22 organizers. Keywords: Model testing; Sub-scaled physical mod l; Finite Element Method  Digital Image Correl tion Method. The possibilities of testing real constructions are often limited, especially in case of large ones, e.g. bucket wheel excavator. It is well known that the number of failures of these machines should be reduced to the minimum because the cancellat on of ch a machin implies a double "cost", the cost of repair and cost because production process is stopped. Anyhow, if a machine is already stopped, it is primarily necessary to find out the cause in order to © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Model analysis of complex structures – advantages of physical sub scaled model testing and shortcomings in physical model production Ana Petrovi ć a * , Taško Maneski a , Dragan Ignjatovi ć b , Nataš a Trišović a , Ines Grozdanović b , Wei Li c a Faculty of Mechanical Engineering, 11120 Belgrade, Serbia b Faculty of Mini g nd Geology, 11 20 Belgrade, Serbia c Xi'an Jiaotong University, Xi'an, China Abstract The possibilities of testing real constructions strength are often limited, especially in case of large constructions. Testing on the model, instead of the actual construction, results in a great savi g of mon y and time. Sub-scaled model of the construction of substructur , the slewing platform and the lower part of the pylons of th bucket wheel excavator SchRs630 is made. Numerical calculations (using F ite Element Method) and experim nta testing of the mod l were performed. Experi ental testing is performed using classical strain gauge method and Digital Image Correlation Method (A amis system). Onc again, advantage of Digital Ima e Correlation method compared to classical measu ment methods are confirm d. The negat ve impact of conventional manufacturing methods in s e zones is noticed. © 2018 The Authors. Published by Elsevier B.V. Peer-revi w under espons bility of the ECF22 organiz rs. Keywords: Model testing; Sub-scaled physical model; Finite Element Method  Digital Image Correlation Meth d. 1. Introduction The possibilities of testing real constructions are often limited, especially in case of large ones, e.g. bucket wheel excavator. It is w ll kn wn that the number f failures of these machines should be reduced to the minim m because the cancellation of such a machine implies a double "c st", the cost of repair and cost because production process is stopp d. Anyhow, if a machine is already stopped, it is primarily n cessary to find out the cause in order to © 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. 1. Introduction

* Corresponding author. Tel.: +381 69 2308888. E-mail address: aspetrovic@mas.bg.ac.rs * Corresponding author. Tel.: +381 69 2308888. E-mail ad ress: aspetrovic@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 o ganizers.

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.2018.12.076