PSI - Issue 5

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structu al Integrity 5 (2017) 667–674 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2017) 000 – 000 il l li t . i ir t. tructural Integrity rocedia 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Polymer nanocomposites PE/PE-g-MA/EPDM/nanoZnO and TiO 2 dynamically crosslinked with sulphur and accelerators L. ALEXANDRESCU a , M. SÖNMEZ a , M. GEORGESCU a , M. NIŢUICĂ a , A. FICAI b , R. TRUSCA b D. GURĂU a * a INCDTP - Division Leather and Footwear Research Institute 93 Ion Minulescu St., sector 3, Bucharest, Romania, laurentia.alexandrescu@icpi.ro, icpi@icpi.ro; b Faculty of Ap lied Chemistry and Materials Science, University POLI EHNICA of Bucharest, 1 Polizu St., Bucharest, anton.ficai@upb.ro; Abstract Nanocrosslinked elastic-plastic nanocomposites are blends that combine economically and performant properties of at least two polymers (elastomer and plastomer) and nanoparticles in a single product. In these blends the elastomeric phase is crosslinked in the thermoplastic melt blending under conditions of thermodynamic technology. This paper presents the development of multiphase elastic-plastic polymeric nanocomposites, dynamically crosslinked, reinforced with nanoparticles for products used in food and pharmaceutical domain, a new variety of composite material based on elastomer (ethylene-propylene ter-polymer rubber - EPDM) and nanofiller (ZnO and TiO 2 ) dispersed in the plastomer matrix(high density polyethylene-HDPE). Elastomers and nanofiller by nanometric dispersion in plastomer matrix have led to obtaining a performant polymer material with multifunctional characteristics (rubber and thermoplastic) and processing properties specific to plastics. Also, the elastomer was dynamically cross-linked in the plastomer matrix, during processing, by classic vulcanization system with sulfur and accelerators. Accelerators used, namely tert-butyl-2-benzothiazyl sulphenamide -Vulkacit NZ and benzothiazyl-2-dicyclohexyl sulphenamide - Vulcacit DZ. The crosslinking method is ecological, without release of aromatic nitrosamines, which are carcinogenic in the crosslinking process. Obtained composites were physical-mechanical characterized by standard methods specific to plastics. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. tr t r l I t rit , I I , - t r , l, Madeira, Portugal crosslinked with sulphur and accele tors . a , . NMEZ a , . a , . CĂ a , A. FICAI b , . b . a * a I - ivision eather and oot ear esearch Institute, 93 Ion inulescu St., sector 3, u harest, o ania, laurentia.alexandrescu icpi.ro, icpi icpi.ro; b Faculty of p lied he istry and aterials Science, niversity I I of uch rest, 1 olizu St., ucharest, anton.ficai upb.ro; str ct a cr ssli e elastic- lastic a c sites are le s t at c i e ec icall a erf r a t r erties f at least t l ers (elast er a last er) a a articles i a si le r ct. I t ese le s t e elast eric ase is cr ssli e i t e t er lastic elt le i er c itions of thermodynamic technology. This a er rese ts t e e el e t f lti ase elastic- lastic l eric a c sites, a icall cr ssli e , rei f rce it a articles f r r cts se i f a ar ace tical ain, a e ariety of composite material ase elast er (et le e- r le e ter-polymer rubber - EPDM) and nanofiller (ZnO and TiO 2 ) dispersed in the plastomer matrix(high density polyethylene-HDPE). last ers a a filler a etric is ersi i last er atri a e le t tai i a erf r a t l er aterial it ltif cti al c aracteristics (r er a t er lastic) and processing properties specific to plastics. Also, the elastomer was a icall cr ss-li e i t e last er atri , ri r cessi , classic lca izati s ste it s lf r a accelerat rs. ccelerat rs se , a el tert- t l- - enzothiazyl sulphenamide -Vulkacit NZ and benzothiazyl-2-dicyclohexyl sulphenamide - lcacit . e cr ssli i et is ec l ical, it t release f aromatic nitrosamines, which are carcinogenic in the cr ssli ing process. Obtained composites ere sical- ec a ical characterized by standard methods specific to plastics. e t rs. lis e lse ier . . Peer-review under responsibilit f the Scientific Committee of IC I . © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. Keywords: nanocomposite, dynamical cross-link, sulfur and accelerators ey ords: nanoco posite, dyna ical cross-link, sulfur and accelerators I t r ti l f r

Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017 10.1016/j.prostr.2017.07.040 * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2452-3216 2017 he uthors. ublished by lsevier . . eer-re ie er res si ilit f t e cie tific ittee f I I . * Corresponding author-L. Alexandrescu, Tel.: +4021 3235060; fax: +4021 3235280. E-mail address: laurentia.alexandrescu@icpi.ro * orresponding author- . lexandrescu, el.: 4021 3235060; fax: 4021 3235280. - ail address: laurentia.alexandrescu icpi.ro