Response and representation of ductile damage under varying shock loading conditions in tantalumCitation formats

  • External authors:
  • C. A. Bronkhorst
  • G. T. Gray
  • F. L. Addessio
  • V. Livescu
  • S. A. MacDonald

Standard

Response and representation of ductile damage under varying shock loading conditions in tantalum. / Bronkhorst, C. A.; Gray, G. T.; Addessio, F. L.; Livescu, V.; Bourne, N. K.; MacDonald, S. A.; Withers, P. J.

In: Journal of Applied Physics, Vol. 119, No. 8, 085103, 28.02.2016.

Research output: Contribution to journalArticle

Harvard

Bronkhorst, CA, Gray, GT, Addessio, FL, Livescu, V, Bourne, NK, MacDonald, SA & Withers, PJ 2016, 'Response and representation of ductile damage under varying shock loading conditions in tantalum', Journal of Applied Physics, vol. 119, no. 8, 085103. https://doi.org/10.1063/1.4941823

APA

Bronkhorst, C. A., Gray, G. T., Addessio, F. L., Livescu, V., Bourne, N. K., MacDonald, S. A., & Withers, P. J. (2016). Response and representation of ductile damage under varying shock loading conditions in tantalum. Journal of Applied Physics, 119(8), [085103]. https://doi.org/10.1063/1.4941823

Vancouver

Bronkhorst CA, Gray GT, Addessio FL, Livescu V, Bourne NK, MacDonald SA et al. Response and representation of ductile damage under varying shock loading conditions in tantalum. Journal of Applied Physics. 2016 Feb 28;119(8). 085103. https://doi.org/10.1063/1.4941823

Author

Bronkhorst, C. A. ; Gray, G. T. ; Addessio, F. L. ; Livescu, V. ; Bourne, N. K. ; MacDonald, S. A. ; Withers, P. J. / Response and representation of ductile damage under varying shock loading conditions in tantalum. In: Journal of Applied Physics. 2016 ; Vol. 119, No. 8.

Bibtex

@article{7435c7e6ebf640b2a78f871920b5dba9,
title = "Response and representation of ductile damage under varying shock loading conditions in tantalum",
abstract = "The response of polycrystalline metals, which possess adequate mechanisms for plastic deformation under extreme loading conditions, is often accompanied by the formation of pores within the structure of the material. This large deformation process is broadly identified as progressive with nucleation, growth, coalescence, and failure the physical path taken over very short periods of time. These are well known to be complex processes strongly influenced by microstructure, loading path, and the loading profile, which remains a significant challenge to represent and predict numerically. In the current study, the influence of loading path on the damage evolution in high-purity tantalum is presented. Tantalum samples were shock loaded to three different peak shock stresses using both symmetric impact, and two different composite flyer plate configurations such that upon unloading the three samples displayed nearly identical {"}pull-back{"} signals as measured via rear-surface velocimetry. While the {"}pull-back{"} signals observed were found to be similar in magnitude, the sample loaded to the highest peak stress nucleated a connected field of ductile fracture which resulted in complete separation, while the two lower peak stresses resulted in incipient damage. The damage evolution in the {"}soft{"} recovered tantalum samples was quantified using optical metallography, electron-back-scatter diffraction, and tomography. These experiments are examined numerically through the use of a model for shock-induced porosity evolution during damage. The model is shown to describe the response of the tantalum reasonably well under strongly loaded conditions but less well in the nucleation dominated regime. Numerical results are also presented as a function of computational mesh density and discussed in the context of improved representation of the influence of material structure upon macro-scale models of ductile damage.",
author = "Bronkhorst, {C. A.} and Gray, {G. T.} and Addessio, {F. L.} and V. Livescu and Bourne, {N. K.} and MacDonald, {S. A.} and Withers, {P. J.}",
year = "2016",
month = "2",
day = "28",
doi = "10.1063/1.4941823",
language = "English",
volume = "119",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics",
number = "8",

}

RIS

TY - JOUR

T1 - Response and representation of ductile damage under varying shock loading conditions in tantalum

AU - Bronkhorst, C. A.

AU - Gray, G. T.

AU - Addessio, F. L.

AU - Livescu, V.

AU - Bourne, N. K.

AU - MacDonald, S. A.

AU - Withers, P. J.

PY - 2016/2/28

Y1 - 2016/2/28

N2 - The response of polycrystalline metals, which possess adequate mechanisms for plastic deformation under extreme loading conditions, is often accompanied by the formation of pores within the structure of the material. This large deformation process is broadly identified as progressive with nucleation, growth, coalescence, and failure the physical path taken over very short periods of time. These are well known to be complex processes strongly influenced by microstructure, loading path, and the loading profile, which remains a significant challenge to represent and predict numerically. In the current study, the influence of loading path on the damage evolution in high-purity tantalum is presented. Tantalum samples were shock loaded to three different peak shock stresses using both symmetric impact, and two different composite flyer plate configurations such that upon unloading the three samples displayed nearly identical "pull-back" signals as measured via rear-surface velocimetry. While the "pull-back" signals observed were found to be similar in magnitude, the sample loaded to the highest peak stress nucleated a connected field of ductile fracture which resulted in complete separation, while the two lower peak stresses resulted in incipient damage. The damage evolution in the "soft" recovered tantalum samples was quantified using optical metallography, electron-back-scatter diffraction, and tomography. These experiments are examined numerically through the use of a model for shock-induced porosity evolution during damage. The model is shown to describe the response of the tantalum reasonably well under strongly loaded conditions but less well in the nucleation dominated regime. Numerical results are also presented as a function of computational mesh density and discussed in the context of improved representation of the influence of material structure upon macro-scale models of ductile damage.

AB - The response of polycrystalline metals, which possess adequate mechanisms for plastic deformation under extreme loading conditions, is often accompanied by the formation of pores within the structure of the material. This large deformation process is broadly identified as progressive with nucleation, growth, coalescence, and failure the physical path taken over very short periods of time. These are well known to be complex processes strongly influenced by microstructure, loading path, and the loading profile, which remains a significant challenge to represent and predict numerically. In the current study, the influence of loading path on the damage evolution in high-purity tantalum is presented. Tantalum samples were shock loaded to three different peak shock stresses using both symmetric impact, and two different composite flyer plate configurations such that upon unloading the three samples displayed nearly identical "pull-back" signals as measured via rear-surface velocimetry. While the "pull-back" signals observed were found to be similar in magnitude, the sample loaded to the highest peak stress nucleated a connected field of ductile fracture which resulted in complete separation, while the two lower peak stresses resulted in incipient damage. The damage evolution in the "soft" recovered tantalum samples was quantified using optical metallography, electron-back-scatter diffraction, and tomography. These experiments are examined numerically through the use of a model for shock-induced porosity evolution during damage. The model is shown to describe the response of the tantalum reasonably well under strongly loaded conditions but less well in the nucleation dominated regime. Numerical results are also presented as a function of computational mesh density and discussed in the context of improved representation of the influence of material structure upon macro-scale models of ductile damage.

UR - http://www.scopus.com/inward/record.url?scp=84959431755&partnerID=8YFLogxK

U2 - 10.1063/1.4941823

DO - 10.1063/1.4941823

M3 - Article

VL - 119

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 8

M1 - 085103

ER -