PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 5 (2017) 1005–101 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i ir t. tructural Integrity rocedia 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 Effect of Laser Power on Delamination Initiation Behaviour of CrAlN Coating on Steel Substrate Laser-Quenched after Coating Process under Rolling Contact Fatigue Hirotaka Tanabe a, *, Yui Izumi a , Tohru Takamatsu a and Yuki Nakamura b a The University of Shiga Prefecture, Hassaka 2500, Hikone, Shiga 522-8533, Japan b Engineering Graduate School of The University of Shiga Prefecture, Hassaka 2500, Hikone, Shiga 522-8533, Japan In order to investigate the effects of new surface modification method “Laser quenching after coating” on the rolling contact fatigue strength of ceramic coated steel, CrAlN coated specimens were processed by this method under various laser power conditions, and the thrust type rolling contact fatigue tests were carried out for these specimens. The delamination initiation life of CrAlN coated specimen inc eased with the l ser pow r, however the excessive laser power decreased the lamination initiation life. The adhesive strengt of CrAlN coated specimen showed similar variation for the increase f the laser power. The film hardness was almost constant for the increase of the laser power, however the excessive laser power also decreased the film hardness. From these results, it was considered that the increase of the delamination initiation life of CrAlN coated specimen was caused by the increase of the adhesive strength, and the decrease of the delamination initiation life at high laser power was affected by the decrease of the adhesive strength and/or the film hardness. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Laser quenching; Thin film; Rolling contact fatigue; Delamination; Adhesive strength; Film hardness tr t r l I t rit , I I , - t r , l, deir , rt l li Fatigue i t a, , i i a , Tohru Takamatsu a and Yuki Nakamura b a he niversity of Shiga Prefecture, assaka 2500, ikone, Shiga 522-8533, Japan b ngi eering radu te School of he niversity of Shiga refecture, assaka 2500, ikone, Shiga 522-8533, Japan Abstr ct I r er t i esti ate t e effects f e s rface ificati et “ aser e c i after c ati ” t e r lli c tact fati e stre t f cera ic c ate steel, r l c ate s eci e s ere r cesse t is et er ari s laser er c iti s, a t e t r st t e r lli c tact fati e tests ere carrie t f r t ese s eci e s. e ela i ati i itiati life f r l c ate s eci e i crease it t e l ser er, e er t e e cessi e las r er e e t e la i ati i itiati life. e a esi e stre t f l c ate s eci e s e si ilar ar ati f r t e i crease f t e laser r. e fil ar ess as al st c sta t f r t e i crease f t e laser er, e er t e e cessi e laser er als ecrease t e fil ar ess. r t se res lts, it as c s ere t at t e i cr ase f t e el i ati i itiati life f r l c ate s eci e as ca se t e i cre se f t e a esi e stre t , a t e ecrease f t e ela i ati i itiati life at i laser er as affecte t e ecrease f t e a esi e stre t a / r t e fil ar ess. e t rs. lis e lse ier . . Peer-review u er res si ilit of t e cie tific ittee f I I 7. Keywords: Laser quenching; Thin film; Rolling contact fatigue; Delamination; Adhesive strength; il hardness © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Com ittee of ICSI 2017 Abstract I t r ti l f r © 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. 1. Introduction In our previous studies (e.g., Tanabe et al. (2013), Tanabe et al. (2014)), a new surface modification method by 1. Introduction I r r i s st i s ( . ., t l. ( ), t l. ( )), s rf ifi ti t

* Corresponding author. Tel.: +81-749-28-8380; fax: +81-749-28-8523. E-mail address: tanabe@mech.usp.ac.jp * orresponding author. el.: 81-749-28-8380; fax: 81-749-28-8523. - ail address: tanabe ech.usp.ac.jp

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.2017.07.155 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 2017 he uthors. ublished by lsevier . . eer-re ie er res si ilit f t e cie tific ittee f I I .