PSI - Issue 14

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at www.sciencedire t.com Scie ceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 14 9 68–77 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. 2nd International Conference on Structural Integrity and Exhibition 2018 Effect of Addition of Fly ash and Al 2 O 3 Particles on Mechanical and Tribological Behavior of Al MMC at Varying Load, Time and Speed Vikas Verma 1, *, P. C. Tewari 2 , Roshan Zameer Ahamed 1 , Syed Touseef Ahmed 3 1 Department of Mechanical Engineering, LORDS Institute of Engineering and Technology, Hyderabad, 500091, India 2 Department of Mechanical Engineering, National Institute of Technology, Kurukshetra 136119, India 3 Department of Civil Engineering, LORDS Institute of Engineering and Technology, Hyderabad, 500091, India Abstract The purpose of present research is to identify the effect of addition of flyash and oxide particles on mechanical and tribological behavior of aluminium (Al) base metal matrix composite (MMC). The work involves processing of Al MMC reinforced with flyash and Al 2 O 3 particulates in different proportions via stir casting route. Further their wear behavior were studied at varying load (15 – 25 N), time (3 – 5 minute) and speed (700 – 900 rpm). Scanning electron micrograph (SEM) of processed composites revealed uniform dispersion of the coarser particles and agglomeration due to finer particles. SEM image of pure Al alloy shows the dispersed, broken alumina oxide layer in Al matrix. The broken oxide layer particles are irregular in shape distributed in the Al matrix. SEM image of Al Alloy prepared by reinforcement of flyash and Al 2 O 3 particles revealed homogeneous grains and fine r in b undaries. Appropriat roportion of flyas increased wettability during process resulting in effective casting. Results confirmed increase f 48% in hardness, 63% in strength and 58% in bending strength and considerable reduction in weight loss measured after wear of processed Al composit with 5%fly sh and 12% Al 2 O 3 . Increase in bonding with reduced porosity betw en particles were further mproved by the applied pres ure after the ca ting. SEM micrograph of pure Al alloy worn surfac revealed presence of crack nd fracture at high load, longer time and at high sp ed. Presence of adhered oxide layer is observed in composite with 5%flyash and 12% Al 2 O 3 which restricte further wear of the composite. Al-5%flyash-12% Al 2 O 3 composite is preferred among all investigated compositions. The present work attempts for suitable utilization f fly ash and r ducing the need for disposal of fly ash which in turn causes considerable damage to the environment. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Effect of Addition of Fly ash and Al 2 O 3 Particles on Mechanical and Tribological Behavior of Al MMC at Varying Load, Time and Speed Vikas Verma 1, *, P. C. Tewari 2 , Roshan Zameer Ahamed 1 , Syed Touseef Ahmed 3 1 Department of Mechanical Engineering, LORDS Institute of Engineering and Technology, Hyderabad, 500091, India 2 Department of Mechanical Engineering, National I stitute of Technology, Kurukshet 136119, India 3 Department of Civil Engineering, LORDS Institute of Engineering and Technology, Hyderabad, 500091, India Abstract The purp se of present research is to identify the effect of addition of flyash and xide articles on mechanical and tribological behavior of aluminium (Al) base m tal matrix compos te (MMC). The work involves processing of Al MMC reinforced with flyash and Al 2 O 3 particulates in differe t proportions via sti casting route. Fur her thei we r behavior were studied at vary ng load (15 – 25 N), t me (3 – 5 minute) and s eed (700 – 900 rp ). Sca ning electron micrograph (SEM) of proc ssed c mposite revealed uniform dispersion of the co rse particles and agglomerati n ue to finer particles. SEM image of ure Al alloy shows the dispersed, broken alumina oxide layer in Al matrix. The broken oxide layer particles ar irr gular in shape distributed in the Al matrix. SEM image of Al Alloy prepared by reinforcement of flyash an Al 2 O 3 particles revealed homogeneous rains and fine grain bound ries. Appropri te proportion of fly sh increased wettability during process resulting in effective casting. Result confirmed inc as of 48% in har n ss, 63% in strength an 58% i b nding strength and con iderable reduction in w ight loss measure after wear o proces ed Al composite with 5%fly sh and 12% Al 2 O 3 . Increase in bondi g wi h reduced porosity b twe n articl s were further improved by the applied pr ssure aft r the casting. SEM micrograph of pure Al a lo worn surface rev aled presence of crack and frac ure a high load, longer time and at high sp ed. Presenc of adher oxide layer is bserved n composite with 5%flyash and 12% Al 2 O 3 which restricted further wear of the composite. Al-5%flyas -12% Al 2 O 3 composit is prefe red among a l investigated compositions. The pres nt work attempts fo suitable utilization of fly ash and reducing the need for disposal of fly ash which in turn causes considerable damage to the environment. © 2018 The Authors. Published by Elsevier B.V. This is a open access article under the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. Keywords: High Pressure Turbine Blade; Creep; Finite Element Method; 3D Model; Simulation.

Keywords: Composite Materials; Al 2 O 3 ; Fly ash; Pin-On-Disc; Wear Keywords: Composite Materials; Al 2 O 3 ; Fly ash; Pin-On-Disc; Wear

* Corresponding author. Tel.: 09412448619, E-mail address: vikasverma.iitr@rediffmail.com * Corresponding author. Tel.: 09412448619, E-mail address: vikasverma.iitr@rediffmail.com

2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is a open access article und r the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.

* Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt

2452-3216 © 2016 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Scientific Committee of PCF 2016. 2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.05.010