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) 943–95 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. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Investigation on the Structural Damage of a Double-Hull Ship, Part II – Grounding Impact Aditya Rio Prabowo a , Hyun Jin Cho b , Seung Geon Lee b , Dong Myung Bae b , Jung Min Sohn b, *, Joung Hyung Cho a a Interdisciplinary Program of Marine Convergence Design, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan 48513, South Korea b Department of Naval Architecture and Marine Systems Engineering, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan 48513, South Korea Abstract Possibility of m ine and offshore structures to experienc accide tal loads has be n seriously considered up to this day. Remarkable casualties on related aspects are rising demand to ensure ship safety which in this subject is observed on marine structure. Ship is an example of marine structure that may be subjected to accidental loads during its operation. The aim of this paper is to investigate damage extent of the target ship under different accidental loads, namely collision and grounding with considerations to failure process and deformation contours. This work is divided into two parts which in the Part I, ship collision is discussed, and the Part II deals with interaction of ship structure with sea bottom in grounding. In Part II - Grounding impact, eval ating tearing damage on the bottom structur is essential in estimating environm ntal casualties caused by oil leakage. A chemical tanker is modelled to be the target ship in a series of grounding scenarios. Conditio of the structural damage and tend cy of the internal energy, crus ing force and struct ral acceleration are observed. Prediction of the tearing opening and location of the initial failure in further grounding process are also pr sented in this paper. Virtual experiment is conducted by nonlinear finite element method in order to calculat the defined grounding scenarios which are built based on the target location on the bottom structure. Based on calculation results, condition of the double-hull structure aft r grounding i found to be highly influenced by arrangement of the longitudinal m mbers which is evidenced by the fact that these members provide higher resist nce than the transverse part . Finally, influence of the indenter’s position on structural responses in grounding is summarized. © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal Investigation on the Structural Damage of a Double-Hull Ship, Part II – Grounding Impact Aditya Rio Prabowo a , Hyun Jin Cho b , Seung Geon Lee b , Dong Myung Bae b , Jung Min Sohn b, *, Joung Hyung Cho a a Interdisciplinary Program of Marine Convergence Design, Nam-gu, Yongs -ro 45, Daeyeon-d g, Busan 48513, South Korea b Department of Naval Architecture and Marine Systems Engineering, Nam-gu, Yongso-ro 45, Daeyeon-dong, Busan 48513, South Korea Abstract Possibility of m rin and offshore structu s to exp rie ce accidental loads has been seriously considered up to this day. Remarkable casu lti s on r lated spect are rising demand to ensur ship safety which in th s subject is observed on marine structure. Ship i an xample of marine structure that may be subject d to accidenta loads during its operation. The aim of this paper is to i vestigate damage extent of the target ship under different accidental loads, namely ollision and grounding with considerations to failure proc ss and deform tion c ntours. This work is divided into two parts which in he Part I, sh p collision is discussed, nd the Part II deals with interactio of ship structure w th sea bottom in grou ding. In Part II - Grounding impact, evaluating tearing damag on the bottom structure is es ential in estimating envir mental casualties caused by oil l akag . A chemical ta ker is modelled to be th t rget ship in a seri s of groundi g sc narios. Condition of he structural damage and tendency of he internal nergy, crushi g force and structural cc l ration are obse ved. P ed tion of the tearing opening and location of th initial f ilure in further gr und g proc ss are also prese ted in this paper. Virtual experime t is con ucted by o linear finite elem nt metho i order to calcul te the defin d g oun ing scenarios which re built based on the target location o th bottom st ucture. Based on calculation results, condit on of the double-hull stru ure after gro nding is f und to be highly influenced by ar ang m nt of the longitudinal mem rs which is ev de ced by the fact that t s members provide higher resistanc than the transverse part . Finally, influe ce of the indenter’s position n structural responses in ground is summarized. © 2017 The Autho s. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. © 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: Impact phenomenon; grounding impact; numerical si ulation; structural damage; collision force Keywords: Impact phenomenon; grounding impact; numerical simulation; structural damage; collision force

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.2017.07.129 * 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 Scientific Committee of ICSI 2017. 2452-3216 © 2017 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of ICSI 2017. * Correspon ing author. Tel.: +82(0)-51-629-6613; fax: +82(0)-51-629-6608. E-mail address: jminz@pknu.ac.kr * Corresponding author. Tel.: +82(0)-51-629-6613; fax: +82(0)-51-629-6608. E-mail address: jminz@pknu.ac.kr