PSI - Issue 13

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 13 (2018) 328–333 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 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. ECF22 - Loading and Environmental effects on Structural Integrity Crack growth simulation with A DAPCRACK 3D in 3D structures under the influence of temperature T. D. Joy*, J. -P. Brüggemann, G. Kullmer Institute of Applied Mechanics, Paderborn University, Pohlweg 47-49, Paderborn 33098, Germany Lifetime of components or structures that are under cyclic loading rely upon the growth rate and the path of cracks that are developed during its operation. Thus the prediction of fatigue crack growth reduces the adverse effects which can be caused because of its behavior. Many simulation programs are available to foresee the crack growth and growth rate in structures, thereby determining their lifetime. A DAPCRACK 3D is an automatic crack growth simulation program which uses the finite element method to simulate crack growth behavior in structures. FE-Simulations are performed in 3D models of structures to determine the stresses that are developed due to the given loading situations. Thereafter, the software performs fracture mechanical evaluation to determine crack path and the lifetime of components that are under mixed-mode loading. A DAPCRACK 3D is generally used for simulating mechanically loaded components. In addition to the stresses that are caused because of mechanical loading, stresses developed due to the change in temperature in components can also have influe ce on the crack growth behavior. This paper is an attempt to i troduce temperature as a new boundary condition in the software in addition to the mechanical loading conditions that are already available. 3D models of structures are separately created with mechanical and thermal loading conditions. Simulations are conducted to understand the crack growth in models that have only mechanical loading and those having both the mechanical and temperature boundary conditions. The results obtained from both the simulations are evaluated to understand the influence of applying temperature as an additional boundary condition. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. Keywords: Crack growth simulation; A DAPCRACK 3D; fatigue crack growth; temperature simulation © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. ECF22 - Loading and Environmental effects on Structural Integrity Crack growth simulation with A DAPCRACK 3D in 3D structures under the influence of temper ture T. D. Joy*, J. -P. Brüggemann, G. Kullmer Institute of Applied Mechanics, Paderborn University, Pohlweg 47-49, Paderborn 33098, Germany Abstract Lifetime of components or structures that are under cyclic loading rely upon the growth rate and the path of cracks that are developed during its operation. Thus the predic ion of fatigue cra k growth red ces t adverse effects which can be aused because f its behavior. Many simulation programs are avail ble to foresee the crack growt and growth rate in structures, thereby determining their lifetime. A DAPCRACK 3D is an autom tic cr ck growth simulation pro am which uses th finite element m thod to simulate crack growth behavior in structures. FE-Simulations are perfor ed in 3D models of structures to determin the str sses that are developed due to th gi en loading situations. Thereafter, th softwar performs fracture mechanical evaluatio to dete mine cr ck path and the lif time of comp nents that are under mixed-mode loading. A DAPCRACK 3D is generally used f r simulating mechanic lly loaded components. In addition to th stresses that are cause because of mechanical loading, str sses developed du to the change in te erature in compone ts can also have influence on the crack growth be v or. This paper is an attempt to introduce temper tur as a new bo ndary condition in the ftware in additi o the mechanical lo ding conditions that are already available. 3D models of structures are separately created with mechanical and thermal loadi g conditions. Simulations are conducted to understand the crack growth in mod ls that have only mechanical loading and those havi b th the mechanic l a d temperat re boundary conditions. The results obtained from both the simulatio s re evaluated to understand the influence of app yi g r as a additi al b undary conditi n. © 2018 The Authors. Published by Elsevier B.V. Peer-review under espons bility of the ECF22 organizers. Keywords: Crack growth simulation; A DAPCRACK 3D; fatigue crack growth; temperature simulation © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Abstract

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

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the ECF22 o ganizers. * Corresponding author. Tel.: +49-5251-60-5325; fax: +49-5251-60-5322. E-mail address: joy@fam.upb.de * Corresponding author. Tel.: +49-5251-60-5325; fax: +49-5251-60-5322. E-mail ad ress: joy@fam.upb.de

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016.

2452-3216  2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ECF22 organizers. 10.1016/j.prostr.2018.12.055