PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 179–186 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i i t. tr t r l I t rit r i ( )

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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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Simplified Assessment of the Effects of Columns Shortening on the Response of Tall Concrete Buildings Ruben Correia a , Paulo Silva Lobo b, * a Q ueen’s University of Belfast, University Road, Belfast, BT7 1NN, Northern Ireland Creagh Concrete Products ltd, 38 Blackpark Road, Toomebridge, BT41 3SL, Northern Ireland b Departamento de Engenharia Civil e Geologia, Universidade da Madeira, Campus Universitário da Penteada, 9000-390, Funchal, Portugal CERIS, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisb a, Portugal The constructive process as well as the time-dependent effects must be considered in the assessment of the response of complex concre e structures. For tall buildings, the adequate prediction of vertical elements shortening is required to determine its effects on other structural and nonstructural elements, usually overestimated by linear elastic analysis. Thus, simple numerical methods which make it p ssible to consider the most relevant as ects of the structural behaviour may be useful the arly stages of a project. In the research pres nted h rein a simplified metho , which considers the viscoelasticity of concr te as w ll as the construction sequ nce, was used. Its adequacy was ass ssed by comparison of the results for a tall concrete building with those obtained with a commercial software which incorporates a nonlinear staged construction analysis package. The good correlation between the obtained results indicates that the si plified method used may be applied to help make appropriate design choices. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Tall buildings; Concrete; Time-dependent effects; Columns shortening; Constructive process. Madeira, Portugal , a ’ i it f lf t, i it R , lf t, , t I l et t lt , l , i , , t I l b t t i i il l i , i i i , i it i t , - , l, t l I , I tit t i , i i i , . i i , - , i , t l Abstract t ti ll t ti t t t i i t t t l t t t . t ll il i , t t i ti ti l l t t i i i t t i it t t t t l t t l l t , ll ti t li l ti l i . , i l i l t i it i l t i t t l t t t t t l i l i t l t j t. t t i i li i t , i i t i l ti it t ll t t ti , . t i t lt t ll t il i it t t i it i l t i i t li t t ti l i . l ti t t t i lt i i t t t t i li i t li t l i t i i . t . li l i . . Peer-revie i ilit t i ti i itt . : ll il i ; r t ; i - t ff t ; l rt i ; tr ti r . © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 Abstract

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 1. Introduction 1. In i

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Over the years, buildings height has increased to economize on land area, and the construction of reinforced concrete (RC) high-rise buildings became popular. As a result, problems due to differential axial shortening of vertical , il i i t i t i l , t t ti i t i i il i l . lt, l t i ti l i l t i ti l t

* Corresponding author. E-mail address: paulo.lobo@tecnico.ulisboa.pt i t r. - il : l .l t i . li . t rr

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. l i r . . i i ilit t i ti i itt . - t r . li

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.