PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Available online at www.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1401–14 8 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. 2 nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Ultimate Strength Capacity of Welded Joints in High Strength Steels Zuheir Barsoum a *, Mansoor Khurshid a,b a KTH Royal Institute of Technology, Teknikringen 8, 100 44 Stockholm, Sweden b Cargotec Sweden AB Bromma Conquip, Malaxgatan 7, 164 22 Kista, Sweden High strength steels are nowadays used in a wide range of weight lifting applications, e.g. spreaders and cranes, where there is a demand on lightweight design of these structures with increased structural performance where the welds become more sensitive to failure. This study focuses on investigating the influence of the mismatch in the yield strength of the weld filler material and the welds pene ration depth on the ultimate strength capacity and failure modes of butt and fillet welded high strength steels of yield strength in the range of 350 – 960 MPa. The load carrying capacities of these mentioned joints are evaluated with experiments and compared with the stimations by finite elem nt analysis (FEA), and design rules in Eurocode 3 and American Welding Society Code AWS D1.1. Fully penetrated joint with un r-matched filler material is more ductile and the ultimate strength capacity of base plate can be achieved. It is observed that joints with under-matched filler material are more sensitive to penetration ratio. This influence is more pronounced in joints in S960 steel welded with under-matched filler material. It is also found that the design rules in Eurocode3 (valid for design of welded joints in steels of grade up to S700) can be extended to designing of welds in S960 steels using correlation factor of one. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2 nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Ultimate Strength Capacity of Welded Joints in High Strength Steels Zuheir Barsoum a *, Mansoor Khurshid a,b a KTH Royal Institute of Technology, Teknikringen 8, 100 44 Stockholm, Sweden b Cargotec Sweden AB Bromma Conquip, Malaxgatan 7, 164 22 Kista, Sweden Abstract High stre gth s eels are nowadays u d in a wide range of w ight lif ing a plicatio s, e.g. spreaders and cranes, wh re there is a demand on lightweight d ig of these structures with increased structural performance where the welds becom more sensitive to failure. This s udy focuses on investigating the influence of the mismatch in the yield strength of the weld filler mat rial and the welds pe e ratio d pth on the ultimate str ngth pacity and failure modes of butt an fillet welded high strength steels of yiel strength in e ang of 350 – 960 MPa. The load carr ing capacities of these men i ed j ints are evaluated with xperiments and com ared wi t e estimations by finite element analysis (FEA), and d sign rul s in Euroco 3 and A erican Welding Society Co AWS D1.1. Fully penetrated joint with under-matched filler ma er al is more ductile and the ultimate strength capacity of base plat can be achieved. It is observ d that joints ith under-matched filler material are more sensitive to penetration ratio. Thi fluen e is more pronounced in joints in S960 steel welded with under-matched fill r material. It is also found that the design rule in Eurocode3 (valid f design of welded joints in steels of grade up to S700) can be extended to designing of welds in S960 steels using correlation factor of one. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. © 2017 Th Authors. Published by Elsevier B.V. Peer-review und r responsibility of the Scient fic Committe 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 Strength Steels; Welded Joints; Ultimate Strength; Failure; Keywords: High Strength Steels; Welded Joints; Ultimate Strength; Failure;

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

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.2017.07.204 * 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. * Correspon ing aut or. Tel.: +46 70 230 43 42; fax: +46 70 230 43 42. E-mail address: zuheir@kth.se * Corresponding author. Tel.: +46 70 230 43 42; fax: +46 70 230 43 42. E-mail address: zuheir@kth.se