PSI - Issue 28

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 28 (2020) 381–392

© 2020 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) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract The present work presents a new approach to study the structural integrity of railway component. This railway component is a gearbox housing manufactured by welding, bending, and bolting in structural low carbon steel. During maintenance procedures two non-expected cracks were detected through the non-destructive liquid penetrant testing; one in the middle of gearbox housing cover and the other in the central body of the component, near of one weld zone. The new approach developed in this work is divided in two parts: finite elements simulation and numerical simulation. The first part started by simulate the load service applying vibration analyse. Software Abaqus/CAE 6.14 © was used. Four different refined meshes were considered and analysed. And the membrane and bending stresses were determined through stress linearization of the critical vibration modes for each zone (cover and body). To the numerical simulation two programs in Octave language were developed. The Stress Intensity Factor Range (SIFR) and the formulation of standard BS 7910:2013+A1:2015 was used for embedded and superficial flaw types. The programs developed returned the values of SIFR for different scenarios of initial flaws position and geometrical parameters. The expected lifetime of the component was determined for the maximum crack depth corresponding to 75% of the zones’ thickness. © 2020 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) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Keywords: Railway component; flaws; structural durability; crack propagation; stress intensity factor range 1st Virtual European Conference on Fracture Structural integrity study of steel railway gearbox housing J. Serra a , T. Morgado b,c, * a DEMI – Mechanical and Industrial Engineering Department, FCT NOVA - Faculty of Science and Technology, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal b UNIDEMI – Research and Development Unit for Mechanical and Industrial Engineering, FCT NOVA - Faculty of Science and Technology, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal; c IPT – Polytechnic Institute of Tomar, 2200-370 Abrantes, Portugal

* Corresponding author. Tel.: +351-93-982-4712; fax: +351-241-379-500. E-mail address: t.morgado@fct.unl.pt; tmorgado@ipt.pt

2452-3216 © 2020 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) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.045