PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 761–768 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Fatigue strength of welded joints under multiaxial non-proportional loading Sab ina Vantadori a *, Joel Boaretto b , Giovanni Fortese a , Felipe Giordani b , Roberto Isoppo Rodrigues b , Ignacio Iturrioz b , Camilla Ronchei a , Daniela Scorza a , Andrea Zanichelli a a Department of Engineering & Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy b Mechanical Post- Graduate Program, Federal University of Rio Grande do Sul, Sarmento Leite 425, CEP 90050-170, Porto Alegre, Brazil Abstract Fatigue behaviour of a fillet-welded tubular T-joint in the so-called H structural component of an agricultural sprayer is examined by using experimental strain measurements found in the literature and linear elastic finite element analyses. Two stress-based critical plane criteria are applied at a verification point located near the intersection between the end of brace and chord of the above-mentioned T-joint, where crack initiation and growth is experimentally observed. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: agricultural sprayer; critical plane-based criteri ; multiaxial fatigue; non pro ortional loading; T-j int. 1. Introduction Herbicides and fungicides used in Brazilian agriculture to protect the crops against harmful insect and herbs are applied through a pulverisation process performed by agricultural sprayers. Let us consider the arm sprayer consisting of a metal truss structure (named bar) equipped of spray nozzles. The bar is raised and lowered in vertical direction by a structural component, named H component due to its shape (Fig. 1). The H component consists of tubular elements fillet-welded as T-joints. Each T-joint, made of C25E steel, is composed by a chord (with rectangular hollow cross-section) and a brace (with cylindrical hollow cross-section). 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Fatigue strength of welded joints under multi xial non-proportional loading Sabrina Vantadori a *, Joel Boaretto b , Giovanni Fortese a , Felipe Giordani b , Roberto Isoppo Rodrigues b , Ignacio Iturrioz b , Camilla Ronchei a , Daniela Scorza a , Andrea Zanichelli a a Department of Enginee ing & Architectur , Univers ty of Parma, Parco Area dell Scienze 181/A, 43124 Parma, Ita y b Mechanical Post- Graduate Program, Federal University of Rio Grande do Sul, Sarmento Leite 425, CEP 90050-170, Porto Alegre, Brazil Abstract Fatigue b haviour of a fillet-welded tubular T-joint so-c lled H structural component of an agricultural sprayer is xamin by using experim ntal str in measurem nts fou d in the literatur and l ea lastic finit elem nt analyses. Two stress-based critical plane criteria are appli d at a verification point located n ar the intersection between the end of brace and chord of the above-mentioned T-joint, where crack initiation and growth is experimentally observed. © 2017 The Aut o s. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: agricultural sprayer; critical plane-base crit ria; multiaxial fatigue; non proportional loading; T-joint. 1. Introduction H rbicides and fungicides used in Brazilian agriculture to protect the crop against harmful insect and herbs are applied thr ugh a pulveri ation p ocess performed by agricultural sprayer . Let us consider the arm sprayer consisting of a metal truss structure (named b r) equipped of spray nozzle . Th bar is raised and l wered in vertical direction by a structural component, named H compone t due to its shape (Fig. 1). The H component consists of tubular elements fill t-welded as T-joints. Each T-joint, made f C25E steel, is composed by a chord (with rectangular hollow cross-section) and a brace (with cylindrical hollow cross-section). © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 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 0521 905962. E-mail address: sabrina.vantadori@unipr.it * Correspon ing author. Tel.: 39 0521 905962. E-mail address: sabrina.vantadori@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  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.167 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017.