PSI - Issue 6

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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. Copyright © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) An experimental investigation of the strength characteristics of ABS plastic under dynamic loads Chevrychkina A. A. a,b, ∗ , V lkov G. A. a,b , Estifeev A. D. a a SPbU, 7 / 9 Universitetskaya emb., St. Petersburg, 199034, Russia b IPME RAS, V.O., Bolshoj pr., 61, St. Petersburg, 199178, Russia Abstract Experimental studies have been carried out to determine the mechanical properties of additive material made of acrylonitrile butadiene styrene (ABS) plastic under quasistatic and dynamic loads. The strength curve, describes the nonlinear dependence of the critical stress on the rate of deformation, was constructed with the criterion of incubation time.The value of the characteristic incubation time is determined, by comparing the theoretical curve with the experimental data. c 2017 The Authors. Publi hed by Elsevier B.V. Peer-review under responsibility of the CM 2017 organizers. Keywords: 3D print; ABS plastic; dynamic and static loads; incubation time; 1. Introduction These days, there is a growing attention for 3D-printing (or Additive Manufacturing) techniques. While these techniques are already applied for years in the mechanical industry, the development of relatively cheap consumer 3D-printers has given additive manufacturing techniques a new boost. We can expect a lot of from the 3D-printing, some experts believe that these techniques can cause a new industrial revolution and others say that in the future, our construction and some pa t or whole of the machines will be printed. Despite the full potential of 3D printing in general and 3D printing in the construction industry, in particular, it is still necessary to investigate the properties of the printed material so that it can be applied in the construction industry. It is important to know how the material will behave in di ff erent conditions. The critical stress at which the material fractures is one of the main characteristics of the material. In this paper, the results of experimental studies of ABS plastic under conditions of static and dynamic loads are presented. Samples were produced on a 3D printer of two sizes fig.1 in order to assess the possibility of increasing the XXVII International Conference “Mathematical and Computer Simulations in Mechanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) n experi ental investigation of the strength characteristics of ABS plastic under dyna ic loads Chevrychkina A. A. a,b, ∗ , Volkov G. A. a,b , Estifeev A. D. a a SPbU, 7 / 9 Universitetskaya emb., St. Petersburg, 199034, Russia b IPME RAS, V.O., Bolshoj pr., 61, St. Petersburg, 199178, Russia Abstract Experimental studies have been carried out to determine the mechanical properties of additive material made of acrylonitrile butadiene styrene (ABS) plastic under quasistatic and dynamic loads. The strength curve, describes the n nlinear dependence of the critical stress on the rate of deformation, was constructed with the criterion of incubation time.The value of the characteristic incubation time is determined, by comparing the theoretical curve with the experimental data. c 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: 3D print; ABS plastic; dynamic and static loads; incubation time; 1. Introduction These days, there is a growing attention for 3D-printing (or Additive Manufacturing) techniques. While these techniques are already appli d for y ars in the mechanical industry, the development of relatively cheap consumer 3D-printers has given additive manufacturing techniques a new boost. We can expect a lot of from the 3D-printing, some experts believe that these techniques can cause a new industrial revolution and others say that in the future, our construction and some part or whole of the machines will be printed. Despite the full potential of 3D printing in general and 3D printing in the construction industry, in particular, it is still necessary to investigate the properties of the printed material so that it can be applied in the construction industry. It is important to know how the material will behave in di ff erent conditions. The critical stress at which the material fractures is one of the main characteristics of the material. In this paper, the results of experimental studies of ABS plastic under conditions of static and dynamic loads are presented. Samples were produced on a 3D printer of two sizes fig.1 in order to assess the possibility of increasing the © 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.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt ∗ Corresponding author. Tel.: + 7-967-596-4614. E-mail address: Anastasiia.Che@gmail.com ∗ Corresponding author. Tel.: + 7-967-596-4614. E-mail address: Anastasiia.Che@gmail.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2210-7843 c 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 2210-7843 c 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 10.1016/j.prostr.2017.11.043