PSI - Issue 12

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 12 (2018) 594–6 1 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000

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www.elsevier.com/locate/procedia 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. AIAS 2018 International Conference on Stress Analysis Experimental evaluation of the adhesion of a FRCM-tuff strengthening system Renato S. Olivito a , Rosamaria Codispoti a *, Carmelo Scuro a , Saverio Porzio a a University of Calabria Civil Engineering Department, via Pietro Bucci, 87036 Rende (CS), Italy Nowadays, the use of innovative materials for the reinforcement of existing buildings are the most used technological solutions. Several reinforcement systems are available currently on the market and different research groups dealt with them from experimental point of view; these systems differ both in the reinforcing fibers used and the type of matrix applied. The most common reinforcement systems are those based on polymer matrix (FRP) provided by criteria and design rules consolidated in the application field for both new and existing buildings. In recent years scientifically-based cement matrix reinforcement systems (FRCM) are been used and experimented in the field of existing constructions. Unfortunately, there are currently no guidelines for qualification, as well as design criteria and application rules. It is a completely different reinforcement system compared to the common FRP reinforcements, in fact the cement matrix has a different mechanical behavior when applied to masonry su ports. The m chanical behavior, already investigated by numerous authors, highligh s the advantag s that can be ob ained with respect to a traditional reinforcement syste . The aspect that still needs t b analyzed and studied is the adhesion betw en the existing support and the FRCM reinforcement system. In the present wo k, th attention is focused on the adhesion of a FRCM-tuff reinforcement system; for this purpose, experim ntal tests were carried out at the Mat rials an Structural Testing Laboratory of the Civil Engineering Department of the University of Calabria. The specimens consist of blocks of tuff, as regards the support, while the applied FRC reinforcement system is based on basalt fibers and cement matrix. All results were compared with those obtained from previous research using other support materials and reinforcing fibers. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. AIAS 2018 International Conference on Stress Analysis Experimental evalu ti of the adhesion of a FRCM-tuff strengthening system Renato S. Olivito a , Rosamaria Codispoti a *, Carmelo Scuro a , Saverio Porzio a a University of Calabria Civil Engineering D partment, via Pietro Bucci, 87036 Rende (CS), Italy Abstract Nowadays, the use of innovative materials for the reinforcement of existing buildings are the most used technological solutions. Several reinforc ment systems are available currently on the market and ifferent research groups dealt with them from experimental point of view; these systems differ both in the reinf rcing fibers used and the type of matrix applied. The most common rei f rcem nt systems are those bas d on polymer matrix (FRP) provided by criteria and design rules consolidated in the application field for both new and existing buildings. In recent years scientifically-based cement matrix reinforcement systems (FRCM) are been used and experimented in the field of existing constructions. Unfortunately, there are currently no guidelines for qualification, as well as design criteria and application rules. It is a completely different reinforcement system compared to the common FRP reinforc ments, in fact the cement matrix has a different mechanical behavior when applied to masonry supports. The mechanical behavior, already investigated by numerous authors, highlights the advantages that an be obtained with respect to a traditional reinforcement system. The aspect that still needs to be analyzed a d studied is the adhesion betwe n the existing support and the FRCM reinforcement system. In the present work, the atte tion is focused on he dhesion of a FRCM-tuff inforcement system; for t is purp se, exp rimental t s s wer carr ed out at the M t rials and Structural Testing Laboratory of the Civil Engineering Department of the University of Calabria. The specimens consist of blocks of tuff, as regards the support, while the applied FRCM reinforcement system is based n basalt fibers and cement matrix. All results were compared with those obtained from previous research using other support materials and reinforcing fibers. © 2018 The Authors. Published by Elsevier B.V. This is an op n access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Abstract 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. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. 10.1016/j.prostr.2018.11.059 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/) Peer-review under responsibility of the Scientific Committee of AIAS 2018 International Conference on Stress Analysis. * Corresponding author. Tel.: +39 0984496947; fax: +39 0984896926. E-mail address: rosamaria.codispoti@unical.it Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt * Corresponding author. Tel.: +39 0984496947; fax: +39 0984896926. E-mail address: rosamaria.codispoti@unical.it