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|Title: ||Finite-element simulations of split Hopkinson test of Ti-based alloy|
|Authors: ||Demiral, Murat|
Kuokkala, Veli T.
Silberschmidt, Vadim V.
|Keywords: ||Split Hopkinson Pressure Bar|
|Issue Date: ||2011|
|Publisher: ||© Trans Tech Publications|
|Citation: ||DEMIRAL, M. ... et al, 2011. Finite-element simulations of split Hopkinson test of Ti-based alloy. Advanced Materials Research, 223, pp. 296-303.|
|Abstract: ||Ti-based alloys are extensively used in aerospace and other advanced engineering fields
due to their high strength and toughness, light weight, excellent corrosion resistance and ability to
withstand extreme temperatures. Since these alloys are hard to machine, there is an obvious demand
to develop simulation tools in order to analyse the material's behaviour during machining and thus
optimise the entire machining process. The deformation processes in machining of Ti-alloys are
typically characterized by high strains and temperatures. Split Hopkinson Pressure Bar (SHPB)
technique is a commonly used experimental method to characterize the material behaviour at high
strain rates; the stress-strain relation of the material is derived from the obtained experimental data.
A computational study on a three-dimensional finite element model of the SHPB experiment is
performed to assess various features of the underlying mechanics of deformation processes at highstrain
and -strain-rate regimes. In the numerical analysis, an inhomogeneous deformation behaviour
is observed in the workpiece at the initial stages of compression contrary to a standard assumption
of stress and strain homogeneity in the specimen.|
|Description: ||This article was accepted for publication in the journal, Advanced Materials Research [© Trans Tech Publications]. The definitive version is available at: http://dx.doi.org/10.4028/www.scientific.net/AMR.223.296|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.4028/www.scientific.net/AMR.223.296|
|Appears in Collections:||Published Articles (Mechanical, Electrical and Manufacturing Engineering)|
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