PSI - Issue 2_B

ScienceDirect Available online at www.sciencedirect.com Av ilable online at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 275 –2756 Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 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. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Seismic resistan of timber structure - a state of the art design Ershad Darvishi a , Abdoullah Namdar a, *, Xiong Feng a , Qi Ge a a Western China Earthquake and Hazards Mitigation Research Center, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China Abstract The timber is used in different parts of construction industry. The use of timber as a structural elements requires special attention in structure design. A timber structure state of art has numerically been designed. FEM was employed in numerical simulation of timber structure. In order to understand seismic resistance of timber structure, the forcing frequency was applied on the structure in different modes. Load, displacement and stress on structure were investigated. All results has been presented in form of graphs. Results indicate the possibilities of safe timber structure constructions. The shape of horizontal displacement of column, located at the corner of structure, has been identified. The flexibility of structure has been discussed. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: FEM; natural frequency; load; displacement. 1. Introduction The traditional full-timber buildings r available in many part of the world for different us . There is an investigation on timber-framed wall. The mode was su table for analysis of the lateral load impact (wind, earthquake) on the building, by using simple 3-dimensional FEM software (Vogrinec et al. 2016). The seismic strengthening and seismic improvement of timber structures were studied and it has been found that the structural scheme must be verified to balance horizontal forces (Parisi and Piazza 2015). A post-tensioned timber frame with hardwood reinforcement was analyzed with a series of static pushover-tests. The frame was loaded with a horizontal force while the displacement was recorded (Wanninger and Frangi 2016). The vertical loads has been applied to timber connection. These loads were closer to horizontal load cases (wind, earthquakes), but they were never 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Seismic resistance of timber structure - a state of the art design Ershad Darvishi a , Abdoullah Namdar a, *, Xiong Feng a , Qi Ge a a Western China Earthquake and Hazards Mitigation Research Center, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China Abstract The timber is used in different parts of construction industry. The use of timber as a structural elements requires special att n on in str cture design. A timber structure state of art has numerically been designed. FEM was e ployed in numeric simulation of timber structure. In ord r to nderstand seismic resistance of timb r structure, the forcing frequency was applied on the structure in different modes. L ad, di placement and stress on structure were inv stigated. All results has be n presented in form of graphs. Result indicate the possibilities of safe timber str cture constructions. The shape of horizontal displac me t f column, located at the corner of structure, has been id ntified. The flexibility of structure ha be n discussed. © 2016 The Auth rs. Pub ished by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Keywords: FEM; natural frequency; load; displacement. 1. Introduction The traditional full-timber buildings are available in many part of the world for different use. There is an investigation timber-fram d wall. The model was suitable for analysis of the lateral load impact (wind, earthqu ke) on the building, by using simple 3-dim nsional FEM software (Vogrinec et . 2016). The seismic strengthening and seismic improvement of timber structures were studied and it has been found that the structural cheme must be verified to balanc horizon al fo ces (Parisi and Piazza 2015). A post-t si ne timber frame with hardwood reinforc ment was nalyzed with a series of st tic pushover-tests. The frame wa l aded with a horizontal fo ce while the displacement w s r corded (Wanninger and Frangi 2016) T vertical loads has been applied to timber connection. Th se loads were closer to horizontal load cases (wind, earthquakes), but th y were never Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the Scientific Committee of ECF21. © 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 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review un r responsibility of the Scientific Committee of ECF21. 2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer review under r sponsibility of the Scientific Committee of ECF21. * Corresponding author. Tel.: +86-18280156225; fax: +86-28-85469886. E-mail address: ab_namdar@yahoo.com * Corresponding author. Tel.: +86-18280156225; fax: +86-28-85469886. E-mail address: ab_namdar@yahoo.com

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ). Peer review under responsibility of the Scientific Committee of ECF21. 10.1016/j.prostr.2016.06.343