PSI - Issue 11

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ScienceDirect Available online at www.sciencedirect.com Available o line at ww.sciencedire t.com Sci ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedi Structural Integrity 11 8 44–51 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Int grity Procedia 00 (2018) 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. XIV International Conference on Building Pathology and Constructions Repair – CINPAR 2018 Use of silica fume and nano-silica in mortars attacked by acids present in pig manure Jefferson de Santana Jacob ab *, Amadeu Grezzana Mascelani b , Ricardo L. R. Steinmetz a , Filipe Antonio Dalla Cost c , Osmar Anto io Dalla Costa a a Embrapa Suínos e Aves, BR 153, Km 110, Concórdia, Santa Catarina, 89715-899, Brazil b Universidade do Contestado, Rua Vict r Sopelsa, 3000, Concórdia, Santa Catarina, 89711-330, Brazil c Universidade Estadual Paulista UNESP-FCAV, Rua Prof. Paulo Donato Castellane s/n, Jaboticabal, São Paulo, 14884-900, Brazil Pig houses provide a highly aggressive environment to concrete str ctures. The chemical aggressiveness generated by pig manure may cause wear, loss in strength and premature damage to floors, leading to animal hoof diseases. Since the chemical attack in cementitious structures is controlled by its porosity and permeability, the use of mineral admixtures in cement is convenient. This work evaluated the behaviour of cement mortars with nano-silica and silica fume (micro-silica) to an acid attack, simulating the effects of acids present in pig manure to cementitious materials. Two cement mortars were tested: one with nano-silica as an additive and another with nano-silica and silica fume (cement replacement of 10%), as well as a control mortar with Portland cement. The mortars were submitted to acid attack cycles for four weeks. The compressive strength at 35, 50 and 65 days, mass loss and water absorption after 65 days were evaluated. Mortars containing nano-silica and silica fume showed considerable loss of workability, however showed the best performance in all studied aspects, indicating that the simultaneous use of these additions may result in longer-lasting concrete structures in pig houses. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers 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 Use of silica fume and nano-silica in mortars attacked by acids present in pig manure Jefferson de Santana Jacob ab *, Amadeu Grezzana Mascelani b , Ricardo L. R. Steinmetz a , Filipe Antonio Dalla Costa c , Osmar Antonio Dalla Costa a a Embrapa Suínos e Aves, BR 153, Km 110, Concórdia, Santa Catarina, 89715-899, Brazil b Universidade do Co testado, Rua Victor Sopelsa, 3000, Concórdi , S nta Catarina, 711-330, Brazil c Universidade Estadual Paulista UNESP-FCAV, Rua Prof. Paulo Do a o Castellane s/n, J bot cabal, São Paulo, 14884-900, Brazil Abstract Pig houses provide a highly aggressive environme t o c ncr te stru tures. The chemical aggressi eness generated by pig manure may cause wear, loss in strength and premature damage to floors, leading to animal hoof diseases. Since the chemical attack in cementitious structures is co trolled by its porosity and permeability, the use of mineral admixtur s in cement is convenient. This work evaluated the b haviour of cement mortars with nano-silica and silica fume (micro-silica) to a acid attack, simulating the effects of acids present in pig manure to cementitious materials. Two cement mortars were tested: one with nano-silica as an additive and another with nano-silica and silica fume (cem nt replacement of 10%), as well as a control mortar with Portland cement. The mortars ere submitted to acid att ck cycles for four weeks. The compressive strength at 35, 50 and 65 days, mass loss and water absorption after 65 days were evaluated. Mortars containing nano-silica and silica fume showed considerable loss of workability, however showed the best performance in all studied aspects, indicating that the simultaneous use of these additi ns may result in longer-lasting concrete structures in pig houses. Copyright © 2018 Elsevier B.V. All rights reserved. Peer-review under responsibility of the CINPAR 2018 organizers Keywords: imal w lfare; concrete; silica fume; ano-sil ca; pig manure. Abstract

Keywords: animal welfare; concrete; silica fume; nano-silica; pig manure.

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 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. * Corresponding author. Tel.: +55 49 3441-0426; fax: +55 49 3441-0400. E-mail address: jefferson.jacob@embrapa.br * Corresponding author. Tel.: +55 49 3441-0426; fax: +55 49 3441-0400. E-mail ad ress: jeffe son.jacob@embrapa.br

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