Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure

Research output: Contribution to conferenceAbstractAcademic

Abstract

Failure of ductile metals has widely been observed to occur by nucleation, growth and coalescence of voids [1]. Plastic anisotropy has a key importance on the growth and strain distribution leading to coalescence of the voids in addition to the stress state [2,3]. In this study, growth of pre-existing voids in bcc single crystals were investigated by using rate independent crystal plasticity framework. Deformation of bcc crystal structure was modeled by using two different approaches, namely, with 24 potential slip systems of {110}<111> and {112}<111> types and with non-Schmid effects on {110}<111> slip system and the resultant deformation was compared with respect to each other [4,5]. Finite element simulations were conducted based on 2D plane strain calculations of a unit cell with one cylindrical void. Fully periodic boundary conditions were employed during the deformation of the unit cell under uniaxial and biaxial loading conditions. Unit cell with one hole was used to investigate the effect of lattice orientation on the growth and shape change of the voids. It was observed that the lattice orientation had an immense effect on the distribution of strain within the unit cell. Furthermore, various hole sizes were used to model the effect of inter-void spacing in order to investigate strain distribution between voids, which may lead to coalescence and failure.
Original languageEnglish
Number of pages1
Publication statusPublished - Sep 2017
EventXIV International Conference on Computational Plasticity - Fundamentals and Applications 2017: Fundamentals and Applications - Barcelona, Spain
Duration: 5 Sep 20177 Sep 2017
Conference number: 14
http://congress.cimne.com/complas2017/frontal/Series.asp

Conference

ConferenceXIV International Conference on Computational Plasticity - Fundamentals and Applications 2017
Abbreviated titleCOMPLAS 2017
CountrySpain
CityBarcelona
Period5/09/177/09/17
Internet address

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voids
crystal structure
single crystals
coalescing
strain distribution
cells
slip
plastic anisotropy
plane strain
plastic properties
spacing
nucleation
boundary conditions
metals
crystals
simulation

Cite this

Asik, E. E., Perdahcioglu, E. S., & van den Boogaard, A. H. (2017). Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure. Abstract from XIV International Conference on Computational Plasticity - Fundamentals and Applications 2017, Barcelona, Spain.
Asik, Emin Erkan ; Perdahcioglu, Emin Semih ; van den Boogaard, Antonius H. / Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure. Abstract from XIV International Conference on Computational Plasticity - Fundamentals and Applications 2017, Barcelona, Spain.1 p.
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abstract = "Failure of ductile metals has widely been observed to occur by nucleation, growth and coalescence of voids [1]. Plastic anisotropy has a key importance on the growth and strain distribution leading to coalescence of the voids in addition to the stress state [2,3]. In this study, growth of pre-existing voids in bcc single crystals were investigated by using rate independent crystal plasticity framework. Deformation of bcc crystal structure was modeled by using two different approaches, namely, with 24 potential slip systems of {110}<111> and {112}<111> types and with non-Schmid effects on {110}<111> slip system and the resultant deformation was compared with respect to each other [4,5]. Finite element simulations were conducted based on 2D plane strain calculations of a unit cell with one cylindrical void. Fully periodic boundary conditions were employed during the deformation of the unit cell under uniaxial and biaxial loading conditions. Unit cell with one hole was used to investigate the effect of lattice orientation on the growth and shape change of the voids. It was observed that the lattice orientation had an immense effect on the distribution of strain within the unit cell. Furthermore, various hole sizes were used to model the effect of inter-void spacing in order to investigate strain distribution between voids, which may lead to coalescence and failure.",
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Asik, EE, Perdahcioglu, ES & van den Boogaard, AH 2017, 'Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure' XIV International Conference on Computational Plasticity - Fundamentals and Applications 2017, Barcelona, Spain, 5/09/17 - 7/09/17, .

Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure. / Asik, Emin Erkan; Perdahcioglu, Emin Semih; van den Boogaard, Antonius H.

2017. Abstract from XIV International Conference on Computational Plasticity - Fundamentals and Applications 2017, Barcelona, Spain.

Research output: Contribution to conferenceAbstractAcademic

TY - CONF

T1 - Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure

AU - Asik, Emin Erkan

AU - Perdahcioglu, Emin Semih

AU - van den Boogaard, Antonius H.

PY - 2017/9

Y1 - 2017/9

N2 - Failure of ductile metals has widely been observed to occur by nucleation, growth and coalescence of voids [1]. Plastic anisotropy has a key importance on the growth and strain distribution leading to coalescence of the voids in addition to the stress state [2,3]. In this study, growth of pre-existing voids in bcc single crystals were investigated by using rate independent crystal plasticity framework. Deformation of bcc crystal structure was modeled by using two different approaches, namely, with 24 potential slip systems of {110}<111> and {112}<111> types and with non-Schmid effects on {110}<111> slip system and the resultant deformation was compared with respect to each other [4,5]. Finite element simulations were conducted based on 2D plane strain calculations of a unit cell with one cylindrical void. Fully periodic boundary conditions were employed during the deformation of the unit cell under uniaxial and biaxial loading conditions. Unit cell with one hole was used to investigate the effect of lattice orientation on the growth and shape change of the voids. It was observed that the lattice orientation had an immense effect on the distribution of strain within the unit cell. Furthermore, various hole sizes were used to model the effect of inter-void spacing in order to investigate strain distribution between voids, which may lead to coalescence and failure.

AB - Failure of ductile metals has widely been observed to occur by nucleation, growth and coalescence of voids [1]. Plastic anisotropy has a key importance on the growth and strain distribution leading to coalescence of the voids in addition to the stress state [2,3]. In this study, growth of pre-existing voids in bcc single crystals were investigated by using rate independent crystal plasticity framework. Deformation of bcc crystal structure was modeled by using two different approaches, namely, with 24 potential slip systems of {110}<111> and {112}<111> types and with non-Schmid effects on {110}<111> slip system and the resultant deformation was compared with respect to each other [4,5]. Finite element simulations were conducted based on 2D plane strain calculations of a unit cell with one cylindrical void. Fully periodic boundary conditions were employed during the deformation of the unit cell under uniaxial and biaxial loading conditions. Unit cell with one hole was used to investigate the effect of lattice orientation on the growth and shape change of the voids. It was observed that the lattice orientation had an immense effect on the distribution of strain within the unit cell. Furthermore, various hole sizes were used to model the effect of inter-void spacing in order to investigate strain distribution between voids, which may lead to coalescence and failure.

M3 - Abstract

ER -

Asik EE, Perdahcioglu ES, van den Boogaard AH. Numerical investigation of void growth with respect to lattice orientation in bcc single crystal structure. 2017. Abstract from XIV International Conference on Computational Plasticity - Fundamentals and Applications 2017, Barcelona, Spain.