An Experimental and Numerical Study of Ballistic Impacts on a Turbine Casing Material at Varying Temperatures

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.

Description

Title: An Experimental and Numerical Study of Ballistic Impacts on a Turbine Casing Material at Varying Temperatures
Author/s:
  • Erice Echávarri, Borja
  • Gálvez Díaz-Rubio, Francisco
  • Cendón Franco, David Ángel
  • Sanchez Galvez, Vicente
  • Borvik, Tore
Item Type: Presentation at Congress or Conference (Article)
Event Title: 26th International Symposium on Ballistics
Event Dates: 12/09/2011 - 16/09/2011
Event Location: Miami, FL, USA
Title of Book: Proceedings of 26th International Symposium on Ballistics
Date: 2011
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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

More information

Item ID: 13216
DC Identifier: http://oa.upm.es/13216/
OAI Identifier: oai:oa.upm.es:13216
Deposited by: Memoria Investigacion
Deposited on: 30 Oct 2012 08:54
Last Modified: 25 Sep 2018 06:46
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