PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 555–561 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 The Study of Evolution of Physical and Mechanical Properties of Metals Under Very High Cycle Fatigue A. Prokhorov a *, A. Petrova b , O. Plekhov a a Institute of continuous media mechanics UB RAS, 614013, 1 Ak. Koroleva, Perm, Russia b M.N. Miheev Institute of Metal Physics UB RAS, 620137 18 S. Kovalevskaya, Yekaterinburg, Russia Abstract This work is devoted to experimental investigation of Armco iron fracture under very high cycle fatigue. The tests were carried out using ultrasonic test machine USF-2000 manufactured by SHIMADZU. The frequency of tests was 20 kHz. The specimens were tested under two cooling conditions: air stream and water tank. The water cooling provides better cooling of material and exclude overheating. The fracture surfaces were investigated using SEM microscope. It was show the strong influence of cooling condition on fracture behavior of the specimen. The peculiarity of PDM signal was compared with different types of fracture on the surfaces of specimens. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Very igh cycle fatigue, Fracture, armco-iron, fatigue cra k, stracture. 1. Introduction The necessity of saving resources and improving the economic efficiency of industrial production is a strong impetus for designing of new technologies and materials, which could ensure safe fatigue life of various mechanisms and structures such as bridges, railroad tracks, parts of machine and gas turbine engines, and so on, subjected to about 10E+10 load cycles. The experimental study of fatigue properties of the material on such a cyclic basis involves 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal The Study of Evolution of Physical and Mechanical Properties of Metals Under Very High Cycle Fatigue A. Prokhorov a *, A. Petrova b , O. Plekhov a a Institute of continuous media mechanics UB RAS, 6 4013, 1 Ak. Koroleva, Perm, R ssia b M.N. Miheev Institute of Metal Physics UB RAS, 620137 18 S. Kovalevskaya, Yekaterinburg, Russia Abstract This work is devoted to exper mental investigation of Armco iron fracture under v ry high cycl fatigue. The tests were arried out using ultrasonic test machine USF-2000 manufactured by SHIMADZU. The frequency of tests was 20 kHz. The specimens were tested under two cooling conditions: air stream and water tank. The water oling provides bett r c oling of material and exclude overhe ting. The fracture surfaces were investigated using SE microscope. It was show the st o g influence of cooli g condition on fracture behavior of the specimen. The peculiarity of PDM signal was compared with different types of fracture on the surfaces of specimens. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. Keywords: Very high cycle fatigue, Fracture, armco-iron, fatigue crack, stracture. 1. Introduction The necessity of saving resources and improving the economic efficiency of industrial production is a strong impetus for designing of new technologies and materials, which could ensure safe fatigue life of various mechanisms and structures such as bridges, railroad tracks, parts of machine and gas turbine engines, and so on, subjected to about 10E+10 load cycles. The experimental study of fatigue properties of the material on such a cyclic basis involves © 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.

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.2017.07.172 * 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 author. Tel.: +7-432-237-8312; fax: +7-432-237-8487. E-mail address: Prokhorov.a@icmm.ru * Corresponding author. Tel.: +7-432-237-8312; fax: +7-432-237-8487. E-mail address: Prokhorov.a@icmm.ru