PSI - Issue 6

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ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 P o edi Structural Integr ty 6 (2017) 4 –47 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 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. Copyright © 2017 The Authors. Published by Elsevi r 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) Ballistic Characteristics of Bi-layered Armour with Various Aluminium Backing against Ogive Nose Projectile J. Venkatesan a, *, M. A. Iqbal a , N. K. Gupta b , V. Bratov c , N. Kazarinov c , F. Morozov c a Department of Civil Engineering, Indian Instiute of Technology Roorkee, Roorkee 247667, India b Department of Applied Mechanics, Indian Institute of Technology Delhi, New Delhi 110016, India c Institute for problems in Mechanical Engineering of the Russian Academy of Sciences, Saint Petersburg State University, St.Petersburg, Russia Abstract The present study focused the effect of aluminium series backing layer on the ballistic resistance of bi-layer ceramic/metal target by means of three dimensional numerical simulation using ANSYS/AUTODYN explicit solver which is cable of modeling and solving the 3D explicit problems. The ceramic and metal layer of bi-layer target was alumina 95% and 1100-H12, 2024-T3, 6061, 7075 aluminium respectively and the impact velocity of ogive nose projectile of 4340 steel was 493, 820 and 1200 m/s. The strength and failure mode of alumina, and steel and aluminium under the projectile impact was computationally modelled by Johnson Holmiquis (JH-2) model and Joh son-Cook (JC) model respectively. The results shows that ballistic resistance of bi-layer target significantly varied with the aluminium series. 7075 aluminium backing help d the bi-layer target to offer high resistance to the projectile penetration for all the impact velocities. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Type your keywords here, separated by semicolons ; XXVII International Conference “Mathematical and Computer Simulations in echanics of Solids and Structures”. Fundamentals of Static and Dynamic Fracture (MCM 2017) Ballistic Chara teristics of Bi-layered Armour with Various Aluminium Backing against Ogive Nose Projectile J. Venkatesan a, *, M. A. Iqbal a , N. K. Gupta b , V. Bratov c , N. Kazarinov c , F. Morozov c a t t f Civil Engineeri g, t ute of Technology Roorkee, Roorkee 247667, I i b Department of Appli d Mechanics, India Institute of Tech ology Delhi, New Delhi 110016, India c Institute for problems in Mechanical Engineering of the Russian Academy of Sciences, Saint Petersburg State University, St.Petersburg, Russia Abstract The present s udy focused the effect of luminium series backing layer on the ballistic resistance of bi-layer ceramic/metal target by means of three dimensional num rical simulation using ANSYS/AUTODYN explicit solver which is cable of modeling and solving the 3D explicit problems. The ceramic and metal layer f bi-layer target was alumina 95% and 1100-H12, 2024-T3, 6061, 7075 l minium respectively and the imp ct velocity of ogive nose projectile of 4340 steel was 493, 820 and 1200 m/s. The strength and fail re mode of alumi a, and teel and aluminium und r he projectile impact as computationally modelled by J hnson Holmiquist (JH-2) mod l and Johnson-Cook (JC) model respectively. The results shows that ballist c resistanc of bi-layer target significantly va ied with the aluminium series. 7075 alumi ium backing helped the bi-layer target to offer high resistance to the proj ctil penetration for all the impact velocities. © 2017 The Autho s. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. Keywords: Type your keywords here, separated by semicolons ;

1. Introduction

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Metals have been an armour for a several decades. However, it is not effective for mobility due to its high density which necessitated search of alternative material for armour application with l w density and other required properties Metals have been an a mour for a s veral decad s. H wever, it is not effective for mobility due to its high density which necessitated search of alternative material for armour application with low density and other required properties

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452 3216 © 2017 Th Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. * Correspon ing author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: jsvenkat.c@gmail.com * Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: jsvenkat.c@gmail.com

2452-3216 Copyright  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the MCM 2017 organizers. 10.1016/j.prostr.2017.11.007

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