PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 492–499 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 Intellectual monitoring of artificial ground freezing in the fluid saturated rock mass Panteleev I. a , Kostina A. a , Zhelnin M. a , Plekhov A. a *, Levin L. b a Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science, Perm, Russia, poa@icmm.ru b Mining institute, Ural Branch of Russian Ac demy of Sciences, Perm 614007, Russia The paper is devoted to the development of monitoring system of artificial ground freezing process (ice wall formation) under vertical shaft sinking. The work consists of two parts. The practical part includes the development of real-time spatial distributed temperature monitoring system. The temperature in control boreholes is measured using fiber-optic system Silixa Ultima based on the Raman Effect. The fiber-optic system has a characteristic length of several hundred meters and measures the temperature with the step equaled to 0.25m and precision of 0.1 o C. The monitoring system is coupled with thermo-hydro mechanical model of fluid-saturated poroelastic media. This model is used for numerical simulation of freezing process. The model increases the possibilities of the current state control of the process and allows us to forecast the evolution of ice wall. To illustrate the efficiency of the developed system the examples of real monitoring of artificial ground freezing in the fluid-saturated rock mass and simulation of freezing and defrosting processes are presented. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: artificial ground freezing, mine shaft, fiber optic cable, monitoring system, numerical simulation an a a a a b a I tit t f ti i i f t l f i f i , , i , i . b i i i tit t , l f i f i , , i i t t t l t it i t ti i i l i i ll ti ti l t i i . i t t t . ti l t i l t l t l ti ti l i t i t t t it i t . t t i t l l i i i ti t ili lti t t. i ti t t i ti l t l t t t t it t t l t . and p i i . o . it i t i l it t i l l l i t t l ti i . i l i i l i l ti i . l i t i iliti t t t t t l t ll t t t l ti i ll. ill t t t i i t l t t l l it i ti i i l i i t l i t t i l ti i defrosting processes are presented. t . li ed by Elsevier B.V. Peer-r i nd n i ilit t i ti i itt 2017. Keywords: artificial ground freezing, mine shaft, fiber optic cable, monitoring system, numerical simulation © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 Abstract

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Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. One of the characteristic features of the modern underground building is an increase in the depth of deposits and, as a consequence, complication of geotechnical conditions. This circumstance is directly connected with the increase , li ti t l iti . i i t i i tl t it t i

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2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.149 * 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