PSI - Issue 14

ScienceDirect Available online at www.sciencedirect.com Av ilable o line at ww.sciencedire t.com S ienceDirect Structural Integrity Procedia 00 (2016) 000 – 000 Procedia Structural Integrity 14 9) 53–59 il bl o li e at www.sciencedirect.com Sci n eDirect Struct ral 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.els vi r.com/locate/procedia

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.2019.05.008 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 Auth rs. Published by Elsevier B.V. This is n pen acc ss art cle under the CC BY-NC-ND license (https://c ativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 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 Processing and Evaluation of Al6082 ba ed Hybrid Matrix Composites for Fracture Toughness using Taguchi Method Puneeth N * , Satheesh J a , G J Nave n b * Research Scholar, Department of Mechanical Engineering, SJB Institute of Technology, Bengaluru, Karnataka, India a Professor, Department of Mechanical Engineering, SJB Institute of Technology, Bengaluru, Karnataka, India b Assistant Professor, Department of Mechanical Engineering, Sambhram Institute of Technology, Bengaluru, Karnataka, India Abstract Conventional monolithic materials are limited in gaining a proper combination of toughness, hardness, density, stiffness and strength. Application of Metal Matrix Composites (MMC’s) in areas such as automotive, aerospace, marine etc. are the most promising mat rials and gaining extensive response in the present day sc nario. These materials are economical with high performance comparatively. Fracture toughn ss is low when compared to metals; i.e., Metal Matrix Composites ar most sought to be oft n used in typical applications. Evalua ion of the plane strain racture toughness using specimen geometries and notches by various researchers for the application of Linear Elastic Fr cture Mechanics have been benchmarked[1,2,3,4,5,]. In the present work, evaluation of fracture toughness of Al6082 based Al 2 O 3 /Al 2 SiO 5 particulate composites are fabricated using stir casting method. Input parameters such as wt. % of Al 2 O 3 , stirring speed and stir time on the hardness, tensile strength, impact strength and fracture toughness of cast Al6082/Al 2 O 3 /Al 2 SiO 5 composites is investigated by Taguchi method. Taguchi’s L9 orthogonal array shows wt. % of Al 2 O 3 is a higher influential factor for experimental design. Three process parameters i.e. wt. % of Al 2 O 3 (3, 6, 9), stirring speed (150, 200, 250 rpm) and stirring time (5, 10, 15 min) are used to fabricate samples of MMC’s comprising of each factor with 3 levels. Micro structural characterization via scanning electron microscope (SEM) is used to have a visual observation on distribution of Al 2 O 3 particles in Al 6082 matrix. Rockwell hardness, tensile test as per ASTM standards, Impact test by charpy technique and single - edge notched beam (SENB) for fracture toughness was carried. Keywords: Al6082; Al 2 O 3 and Al 2 SiO 5 particulates; Stir casting; Fracture Toughness; Scanning Electron Microscope;Taguchi Method . 2nd International Conference on Structural Integrity and Exhibition 2018 Processing and Evaluation of Al6082 based Hybrid Matrix Composites for Fracture Toughness using Taguchi Method Puneeth N * , Satheesh J a , G J Nave n b * Research Sch lar, Department of Mechanical Engineering, SJB Institut of Technology, Bengalur , Karnataka, India a Professor, Department of Mechanical Engineering, SJB Institute of Technology, Bengaluru, Karnataka, India b Assistant Professor, Department of Mechanical Engineering, Sambhram Institute of Technology, Bengaluru, Karnataka, India Abstract Conventional monolithic materials are limited in gaining a proper combination of toughness, hardness, density, stiffness and strength. Application of Metal Matrix Composites (MMC’s) in areas such as automotive, aerospace, marine etc. are the most promising materials and gaining extensive response in the present day scenario. These materials are economical with high performance comparatively. Fracture toughness is low when compared to metals; i.e., Metal Matrix Composites are most sought to be of e used i typical applications. Evaluation of the plane strain fracture t ughness using specim n geome ries and notches by va ous researchers for the applic tion f Linear Elastic Fracture Mechanic h ve been be chmark d[1,2,3,4,5,]. In the present work, evaluat on of fracture toughn s of Al6082 based Al 2 O 3 /Al 2 SiO 5 particul composi s are fabricated using stir casti g method. Input paramet s such as wt. % of Al 2 O 3 , stirring spe d and st r time on the hardness, tensile strength, impac strength and fracture toughness of c st Al6082/Al 2 O 3 /Al 2 SiO 5 composites is invest gated by Taguchi thod. Taguchi’ L9 o thogonal array shows wt. % of Al 2 O 3 is higher influential factor for experim ntal design. Three process parameter i.e. wt. % of Al 2 O 3 (3, 6, 9), stirrin speed (150, 200, 250 rpm) and stirring time (5, 10, 15 min) e used to fabricate amples of MMC’s comprising of each factor with 3 levels. Micro structural cha acterization vi scanning el ctron microscope (SEM) is used to have a visual bservation on distribution of Al 2 O 3 particles in Al 6082 matrix. Rockwell hardness, tensile test as per ASTM standards, Impact te t by charpy technique and single - edg notched beam (SENB) for fracture toughness wa c ried. Keywords: Al6082; Al 2 O 3 and Al 2 SiO 5 particulates; Stir casting; Fracture Toughness; Scanning Electron Microscope;Taguchi Method . 1. Introduction Hybrid Metal Matrix Composites have attracted remarkable attention from science as well as industry. However, little work is carried on the combination selected in our present work. Evaluation revealing the ability of a material/component with pre-occupied flaw/crack to avoid (resist) fracture is the phenomenon of Fracture © 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 op n access article under the CC BY-NC-ND license (h ps://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. * Corresponding author. Tel.: +351 218419991. E-mail address: amd@tecnico.ulisboa.pt 1. Introduction Hybrid Metal Matrix Composites have attracted remarkable attention from science as well as industry. However, little work is carried on the combination selected in our present work. Evaluation revealing the ability of a material/component with pre-occupied flaw/crack to avoid (resist) fracture is the phenomenon of Fracture