PSI - Issue 2_A

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 Struc ural Integrity 2 (2016) 2796–28 2 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2016) 000–000 Available online at www.sciencedirect.com Sci nceDirect Structural Integrity Procedia 00 (2016) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

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 Failure analysis of concrete frame - A numerical analysis Abdoullah Namdar a, * a Western China Earthquake and Hazards Mitigation Research Center, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China Abstract The numerical analysis integrates laboratory experimental results and theoretical concept as well. It is well known that, the shear wall transfer structure’s loads to the safe place, and this procedure leads to structure stability. In this paper, main objective is to analysis effect of shear wall geometry and location in failure mechanism of concrete frame. Three types of concrete shear wall have been used for analysis concrete frame st bility. The four story concrete frame content 5*5 spans, with two sides shear wall have numerically been analyzed. The ABAQUS has been used in numerical simulation to analysis failure mode of concrete frame. It has been found that the model 4 has acceptable dynamic resistance and maximum flexi ility compare to model 2 and 3. The geometry of shear wall has considerable effect on frame stability. Results of this study can be used in design point of view. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: Foundation geometry; failure mechanism; FEM; dynamic resistance. 1. Introduction The structural damage detection based on natural frequency h s been discussed by Dimarogonas (1996). There is an investigation on natural frequencies of annular plates with circumferential cracks. In this research work, the finite element method and theoretical concept are applied. It has been found that the location and the number of cracks hav various effects on the natural frequencies related to the vibration modes (Demir and Mermertas 2008). It has also been reported on a modal analysis for computation of stress intensity factors under dynamic loading conditions at low frequency using eXtended Finite Element Method (X-FEM). The validated modal analysis is used to 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy Failure a alysis of concrete frame - A numerical nalysis Abdoullah Namdar a, * a Western China Earthquake and Hazards Mitigation Research Center, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China Abstract The numerical analysis integrates labora ory experim nt l results and theoretical c ncept as well. It is well known that, the shear wall transfer structure’s loads to the safe place, and this procedure leads to structure stability. In this paper, main objective is to ana ysis ff ct of shear wall geometry and location in failure mechanism of oncrete frame. Three types of concrete hear wall have been used for analysis concrete frame stability. The four story co crete frame con ent 5*5 spans, w th two si s shear wall have numerically been a alyzed. The ABAQUS has be n used in u erical imulation to nalysis ailure mode of concrete frame. It has be n found that the model 4 has acceptabl dy amic re istance and maximum flexibility compare to model 2 and 3. The geometry of shear wall has considerable effect on frame stability. Results of this study can be used in design point of view. © 2016 The Autho s. Publ shed by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: Foundation geometry; failure mechanism; FEM; dynamic resistance. 1. Introduction The ruc ural damage det ctio ba ed o natura fr quency has be n discussed by Dimarogonas (1996). There is an investiga ion on nat ral fr quenci s of annular plates with circumferenti l cracks. In this research work, the finite element method and theor tical conc pt are applied. It has been fou d that the locatio and the number of crack have various eff cts on the natur frequen ies rel ed t the vibra ion modes (Demir and Mermertas 2008). I ha lso been reported on a modal analysis for computation of stress intensity factors und r dynamic loading conditions at low frequency using eXtended Finite Element Method (X-FEM). The validated modal analysis is used to Copyright © 2016 The Authors. Published by Elsevier B.V. This is a open access article under the CC BY-NC-ND license (http://creativec mmons.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 under responsibility of the Scientific Committee of ECF21. 2452 3216 © 2016 Th Authors. Published by Elsevier B.V. Peer-review under responsibility 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.2016.06.350