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) 62 –626 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2017) 000 – 000 il l li t . i i t. tr t r lI 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 Deformation monitoring of load-bearing reinforced concrete beams R. Tsvetkov a , I. Shardakov a , A. Shestakov a , G. Gusev a , V. Epin a * a Institute of Continuous Media Mechanics Russian Academy of Science, 1,Koroleva str., Perm, 614013,Russia Accurate and reliable estimation of the durability and service life of reinforced concrete structures is crucial for predicting and extending their service life. Therefore, we propose a version of the automatic deformation monitoring system deployed to control the reinforced concrete structure, which is an air bridge connecting two parts of the structure. The load-bearing elements of this bridge are the reinforced concrete beams bound together and resti g on iron support columns. The deformation monitoring system allows making crack opening measurements and controlling changes in the macroscopic structure parameters (vertical displacement of beam transverse sections). Control of the vertical displacement of beam elements is implemented by means of hydrostatic level and taut string techniques. The system is provided with IP – cameras (sensors), which makes possible the photogrammetric evaluation of crack width and beam vertical displacements (deflections). Based on the estimates obtained from mathematical modeling, the crack opening values corresponding to pre-critical and critical fracture conditions and the appropriate loads are obtained. The accumulated data are used as the basis for assessing the current deformation state of the structure in relation to the obtained estimates and for predicting the evolution of damage and the residual service life of structures. The proposed automatic monitoring system has been successfully used to control the state of the real structure for 2 years. Analysis of the obtained database indicates seasonal changes in the crack width and reveals the tendency of crack opening to increase with tim . © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of he Scientific Committee of ICSI 2017. Keywords: deformation mo i oring, crack opening width, reinforced-concrete beam . a a I tit t f ti i echanics Russian Academy of Science, 1,Koroleva str., Perm, 614013,Russia t li l ti ti t ilit ice life of reinforced concret t t i i l i ti t i t i i li . , i t t ti ti it i t l t t l t i t t t , i i i i ti t t t t t . l i l t t i i t i t t ti i t l . ti it i t ll i i t t lli i t i t t t ti l i l t t ti . t l t ti l i l t l t i i l t hydrostatic level and taut string techniques. The system is provided with IP – cameras (sensors), which makes possible the photogrammetric evaluation of crack width and beam vertical displacements (deflections). Based on the estimates obtaine t ti l li , t i l i t iti l iti l t iti t i t loads are obtained. The accumulated data are used as the basis for assessing the current deform ti t t t t t i relation to the obtained estimates d for predicting the evolution of damage and t i l i life of structures. The t ti it i t ll t t l t t t t l t t . l i t t i t i i t l i t i t l t t i t i it ti . t . li l i . . i i ilit t i ti i itt . : f r ti it ri , r i i t , r i f r - r t © 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.

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

* Corresponding author. Tel.: +7-342-237-8330; fax: +7-342-237-8487. E-mail address: flower@icmm.ru i t r. l.: - - - ; f : - - - . - il : fl r i .r rr

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.2017.07.028 * 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