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) 392–4 3 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Sci nceDir t Structural Integrity Procedia 00 (2018) 000 – 000

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www.elsevier.com/locate/procedia AIAS 2018 International Conference on Stress Analysis Numerical and experimental v idatio of a non-standard specimen for uniaxial tensile test Lorenzo Bergonzi a,b, *, Matteo Vettori b , Alessandro Pirondi a , Fabrizio Moroni a , Francesco Musiari a a Department of Engineering and Architecture, University of Parma, Parco Area elle Scienze 181/A, 43124 Parma, Italy b MaCh3D srl, Viale Duca Alessandro 42, 43123 Parma, Italy 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. © 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 Numerical and experimental validation of a non-standard specimen for uniaxial tensile test Lorenzo Bergonzi a,b, *, Matteo Vettori b , Alessandro Pirondi a , Fabrizio Moroni a , Francesco Musiari a a Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy b MaCh3D srl, Viale Duca Alessandro 42, 43123 Parma, Italy Abstract Material testing is a fundamental activity for the characterization of materials mechanical properties and for the certification of product quality. With concepts such as Smart Factories and Industry 4.0 coming to the fore, testing and measurement is moving away from laboratories and closer to the production floor: MaCh 3D is a miniaturized tensile testing machine developed for products and materials certification directly on the production site. The heart of the technology is the specimen with non conventional geometry for tensile tests developed so as to be easily installed on the machine. The objective of this work is to illustrate the process of deter ining the geometry of specime and fixtures by numerical an lysis and their experimen al validat on, com aring the results with those obtained from sp cimens according to ASTM D638 tandar , ASTM International, (1999). © 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. Keywords: specimen design; tensile testing; miniaturized tensile testing machine; self-aligning specimen; plastic; additive manufacturing Abstract Material testing is a fundamental activity for the characterization of materials mechanical properties and for the certification of product quality. With concepts such as Smart Factories and Industry 4.0 coming to the fore, testing and measurement is moving away from labor tori s and closer to the production fl or: MaCh 3D is a miniaturized tensile testing machine developed for produc s nd materials certification directly on the p oduction site. The heart of the techn logy is the specim n with on conven ion geometry for tensile test developed so as to be ea il installed on the machin . The objective of this work is to illustrate the pr cess of determining he g ometry of specimen and fixtures by numerical analysis and their experim ntal validation, comparing the results with those obtained from specimens a c rding to ASTM D638 standard, ASTM In ernational, (1999). © 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. Keywords: specimen design; tensile testing; miniaturized tensile testing machine; self-aligning specimen; plastic; additive manufacturing

© 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.: +39 329 188 7002; fax: +39 0521 504400 E-mail address: lorenzo.bergonzi@studenti.unipr.it

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.2018.11.078 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-revi w u er 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.: +39 329 188 7002; fax: +39 0521 504400 E-mail address: lorenzo.bergonzi@studenti.unipr.it * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt