PSI - Issue 11

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com ScienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 11 (2018) 2 2–2 9 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

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. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 New Italian guidelines for design of externally bonded Fabric Reinforced Cementitious Matrix (FRCM) systems for repair and strengthening of masonry and concrete str ctur s Luigi Ascione a , Francesca Giulia Carozzi b , Tom maso D’Antino b , Carlo Poggi b, * a University of Salerno, Via Ponte don Melillo, Fisciano 84084, Italy b Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy The paper summarizes the main features of a standardization activity carried out in Italy by the Ministry of Public Works, to which two of the authors have taken part, for the homologation and the acceptance of Fabric-Reinforced Cementitious Matrix (FRCM) composites. During the last years, such composite materials have becoming increseangly popular in the civil engineering field for strengthening existing constructions, even if difficulties can occur in their mechanical characterization that is strongly affected by different and complex failure mechanisms. The American ACI 549.4R-13 is currently the only available guideline for design and con truction of these systems. In this framework, the paper describes the Italian proposals for the homologation pr cess of FRCM materials as well as for the design of strengthening interventions with these composites. Comparisons with the American guideline are also r ort d together with some considerations regarding the different partial safety factors. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: FRCM; Acceptance criteria; Design formulations; Italian Guideline. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 New Italian guidelines for design of externally bonded Fabric Reinforced Cementitious Matrix (FRCM) systems for repair and strengthening of masonry and concrete structures Luigi Ascione a , Francesca Giulia Carozzi b , Tom maso D’Antino b , Carlo Poggi b, * a University of Salerno, Via Ponte don Melillo, Fisciano 84084, Italy b Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan 20133, Italy Abstract The paper summarizes the main features of a standardization activity carried out in Italy by the Ministry of Public Works, to which two of the authors have taken part, for the homologation a d the acceptance of Fabric-Reinforced Cementitious Matrix (FRCM) composit s. During the last years, such composite materials hav be oming increseangly popular in the civil engineering field for strengthening existing constructions, even if difficulties can occur in their mechanical characterization that is stro gly affecte by different and complex failure mechanisms. The American ACI 549.4R-13 is urrently t e only available guideline for design and construction of thes systems. In t is framework, th paper d scribes the Italian pr posals for the ho olo ation rocess of FRCM materials as well as for th design of strengthening interventi s with t se composite . Compa isons with he American guidelin are also rep rted together with some considerations regard g the different partial safety f ctors. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: FRCM; Acceptance criteria; Design formulations; Italian Guideline. Abstract

1. Introduction

© 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 1. Introduction

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation. Fiber-reinforced composites are widely used to strengthen and retrofit existing concrete and masonry structures. They are characterized by high strength-to-weight ratios, limited invasiveness and easiness of application. Fibre Fiber-reinforced composites are widely used to strengthen and retrofit existing concrete and masonry structures. They are charact rized by high strength-to-weight ratios, limited invasiveness and easiness of application. Fibre

* Corresponding author. Tel.: +39-02-2399-4362; E-mail address: carlo.poggi@polimi.it * Corresponding author. Tel.: +39-02-2399-4362; E-mail ad ress: carlo.poggi@polimi.it

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-revi w u er responsibility of the CINPAR 2018 organizers. 2452-3216 Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINP R 2018 organizers.

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

2452-3216 Copyright  2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 10.1016/j.prostr.2018.11.027