PSI - Issue 13

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 Structural Integrity 13 (2018) 125 –1255 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity Procedia 00 (2018) 000 – 000

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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. ste eolithography micro additively manufactured components A. Davoudinejad a,* , L. C. Diaz Perez b , D. Quagliotti a , D. B. Pedersen a , J. A. Albajez García b , J. A. Yagüe-Fabra b , G. Tosello a a Department of Mechanical Engineering, Technical Univ. of Denmark, Building 427A, Produktionstorvet, 2800 Kgs. Lyngby, Denmark b Aragón Institute for Engineering Research, I3A-University of Zaragoza, C/Maria de Luna, 3, 50018, Zaragoza, Spain Additive manufacturing (AM) is a suitable technique for the production of components with different geometries and complexity that cannot be easily fabricated with traditional manufacturing techniques. However, considering the manufacturing restrictions can clarify the feasibility of the designs to be produced by AM. In this context, this study investigates the capability and limitations, in terms of feature size and geometry, of the Vat Polymerization method by producing various micro components. In order to evaluate the AM machine capability, two test parts, one with hollow cylindrical and the other with hollow box shapes, with different size features have been designed. Different batches of samples were printed to find out the limit for micro polymer components manufacturing with different geometries. The variability of the results in a single print and different batch was also evaluated. The smallest printed feature of size with hollow shape was 630 µm for both geometries and the features smaller than 355 µm were completely solid. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Additive manufacturing; Vat polymerization; Micro manufacturing; Stereolithography; Polymer Additive Manufacturing (AM) is a technology capable of manufacturing a 3D model directly from a 3D CAD by adding material in layers. Therefore, AM is able to rapidly fabricate a wide variety of parts cost-effectively without the need for process planning, which allows easy product customization. For this reason, this technology was initially used to produce prototypes (Rapid Prototyping). Due to the recent improvements in AM technologies, parts produced by AM are already suitable for end use and, currently, AM has a wide range of applications (Stampfl et al., 2014). Nevertheless, the time required for the production of one part and its economic cost makes AM still inadequate for mass production, being other technologies like injection molding (IM) more advantageous. © 2018 The Authors. P blished by Elsevier B.V. Peer-review und responsibility of the ECF22 organiz rs. stereolithography micro additively manufactured components A. Davoudinejad a,* , L. C. Diaz Perez b , D. Quagliotti a , D. B. Pedersen a , J. A. Albajez García b , J. A. Yagüe-Fabra b , G. Tosello a a Department of Mechanical Engineering, Technical Univ. of Denmark, Building 427A, Produktionstorvet, 2800 Kgs. Lyngby, Denmark b Aragón Institute for Engin ering Research, I3A-Univ rsity of Zaragoza, C/Maria e Lu a, 3, 5001 , Zaragoza, Spain Abstract Additive manufacturing (AM) is a suitable technique for the production of components with different geometries and complexity that cannot be easily fabricated with traditional manufacturing techniques. However, considering the manufacturi g restrictions can cl rify the f asibility of the designs to be produced by AM. In this context, thi study investigates the c pability a d limitations, in terms of feature size and geometry, of the Vat Polymerization method by producing various micro components. In order to evaluate the AM machine capability, two test parts, one with holl w cylindrical and the other with hollow box shap s, with diff rent size features have been designed. Different batches of samples were printed to find out the limit for micro polymer components manufacturing with differ nt g ometries. The variability of th results in a single print and different batch was also valuated. The smallest pri ted feature of size with hollow sh pe was 630 µm for both geom tries and the features smaller than 355 µm wer completely solid. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Additive manufacturing; Vat polymerization; Micro manufacturing; Stereolithography; Polymer 1. Introduction Additive Manufacturing (AM) is a technology capable of manufacturing a 3D model directly from a 3D CAD by adding material in layers. Therefore, AM is able to rapidly fabricate a wide variety of parts cost-effectively without the need for process planning, which allows easy product customization. For this reason, this technology was initially used to produce prototypes (Rapid Prototyping). Due to the recent improvements in AM technologies, parts produced by AM are already suitable for end use and, currently, AM has a wide range of applications (Stampfl et al., 2014). Nevertheless, the time required for the production of one part and its economic cost makes AM still inadequate for mass production, being other technologies like injection molding (IM) more advantageous. © 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. ECF22 - Loading and Environmental effects on Structural Integrity Geometrical and feature of size design effect on direct ECF22 - Loading and Environmental effects on Structural Integrity Geometrical and feature of size design effect on direct Abstract 1. Introduction

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 organizers.

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. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.256