PSI - Issue 2_A

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com cienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Struc ural Integrity 2 (2016) 2803–28 9 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 A numerical investigation on soil-concrete foundation interaction Abdoullah Namdar a, * a Western China Earthquake and Hazards Mitigation Research Center, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China Abstract The soil-concrete foundation interaction is one of the complicate job in civil engineering. The theoretical concept and numerical analysis are well supportive in u derstanding soil-concrete foundation interaction. In this paper, the seismic response of group concrete foundations are evaluated for understanding nonlinear s il behavior. The main objective is, to understand effect of a real earthquake acceleration on morphology of differential settlement of soil at the base of concrete foundation and the overall of the soil foundation. The ABAQUS has been used in numerical simulation, in order to simulate differential settlement of soil due to nonlinear soil-concrete foundation interaction. The models were subjected to similar seismic loading. The seismic data are reported at literature, used in numerical simulation. The results indicated that the differential settlement of soil depends on soil concrete foundation interaction. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ECF21. Keywords: FEM; seismic force; differential settlement; failure mode. 1. Introduction The nonlinear soil-concrete foundation interaction may occurs during a strong earthquake. The nonlinear deformations of soil is an important factor in structural stability. From other hand, in most of seismic response of concrete foundation investigation, the foundation is usually considered alone. However, this situation rarely happens in an urban area. The dynamic response single and group foundation are not same. Due to this issue, in this investigation group foundation have been selected for numerical analysis. 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy A numerical investigation on soil-concrete foundation interaction Abdoullah Namdar a, * a Western China Earthquake and Hazards Mitigation Research Center, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China Abstract The soil-concrete foundation interaction is one of the complicate job in civil engineering. The theoretical concept and numerical analysis are well supportive in understanding soil-concrete foundation interactio . In this paper, th seismic respo se of g oup concrete foundations are e aluated for u derstanding onlinear soil behavior. The main objective is, to understand effect f a real earthquake acceleration on morphol gy of differential settlement of soil at the base of c ncrete foundation and the overall of the soil fo ndation. The ABAQUS has been used in umerical simulation, in order to simulate dif ere tial settlement f soil due to n nlinear soil-concrete foundation int raction. The mode s were subjected to sim lar seismic loading. The seismic data are report d at literature, used i numer cal simulation. The r sults indicated hat the diffe ent al sett eme t of soil depends on soil conc te foundation interactio . © 2016 The Auth rs. Published by Elsevier B.V. Peer-review under espons bility of the Scientific Committee of ECF21. Keywords: FEM; seismic force; differential settlement; failure mode. 1. Introduction The no linear so l-concrete foundation int raction may occurs during a strong earthquake. The nonlinear deformations of soil is a important f ct r in st u ural st bility. From other hand, in mos of seismic response of concrete f undati n investigati n, the foundation is sually considered al n . However, thi situation rarely happens in an urban area. The dyn mic response single and group foundation are n t same. Due to this issue, in thi vestigatio g oup foun ation hav bee selected for numerical a alysis. 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 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.2016.06.351