eprintid: 13216
rev_number: 21
eprint_status: archive
userid: 1903
dir: disk0/00/01/32/16
datestamp: 2012-10-30 08:54:46
lastmod: 2018-09-25 06:46:43
status_changed: 2012-10-30 08:54:46
type: conference_item
metadata_visibility: show
item_issues_count: 0
creators_name: Erice Echávarri, Borja
creators_name: Gálvez Díaz-Rubio, Francisco
creators_name: Cendón Franco, David Ángel
creators_name: Sanchez Galvez, Vicente
creators_name: Borvik, Tore
creators_id: f.galvez@upm.es
creators_id: david.cendon.franco@upm.es
title: An Experimental and Numerical Study of Ballistic Impacts on a Turbine Casing Material at Varying Temperatures
ispublished: pub
subjects: materiales
subjects: fisica
subjects: aeronautica
abstract: An  experimental  and  numerical  study  of  ballistic  impacts  on  steel  plates  at  various  temperatures  (700ºC,  400ºC  and  room  temperature)  has  been  carried  out.  The motivation  for  this work is  the  blade‐off event  that may  occur inside a jet engine  turbine. However, as a  first  attempt to understand this complex loading process, a somewhat simpler approach is carried out  in  the  present  work.  The  material  used  in  this  study  is  the  FV535  martensitic  stainless  steel, which is  one  of  the most  commonly  used materials  for  turbine  casings. Based  on material  test  data, a Modified  Johnson‐Cook (MJC) model was calibrated  for numerical simulations using  the  LS‐DYNA  explicit  finite  element  code  (see  Figure  1).  To  check  the  mesh  size  sensitivity,  2D  axisymmetric  finite  element  models  with  three  different  mesh  sizes  and  configurations  were  used  for  the various  temperatures. Two  fixed meshes with 64 and 128 elements over  the 2mm  thick  plate  and  one  mesh  with  32  elements  over  the  thickness  with  adaptive  remeshing  were  used in  the simulations. The  formation  of adiabatic shear bands in  the perforation process has  been  found  critical  in  order  to  achieve  good  results.  Adiabatic  shear  bands  are  formed  by  the  temperature  rise  due  to  the  accumulation  of  plastic  strain  during  impact  (see  Figure  2).  The  influence  of  the  thermal  softening  in  the  plastic  model  has  hence  been  analyzed  for  the  room  temperature impact tests, where the temperature gradient is highest
date: 2011
date_type: published
full_text_status: public
pres_type: paper
event_title: 26th International Symposium on Ballistics
event_location: Miami, FL, USA
event_dates: 12/09/2011 - 16/09/2011
event_type: conference
institution: Caminos
department: Ciencia_Materiales
refereed: TRUE
book_title: Proceedings of 26th International Symposium on Ballistics
rights: by-nc-nd
citation:   Erice Echávarri, Borja and Gálvez Díaz-Rubio, Francisco and Cendón Franco, David Ángel and Sanchez Galvez, Vicente and Borvik, Tore  (2011).  An Experimental and Numerical Study of Ballistic Impacts on a Turbine Casing Material at Varying Temperatures.  In: "26th International Symposium on Ballistics", 12/09/2011 - 16/09/2011, Miami, FL, USA.    
document_url: https://oa.upm.es/13216/1/INVE_MEM_2011_110649.pdf