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Title: Dynamic damage and fracture of a conductive glass under high-rate compression: A synchrotron based study

Dynamic damage and fracture of conductive glass are investigated using a split Hopkinson pressure bar, implemented with in situ X-ray phase contrast imaging (XPCI) and optical imaging for comparison. Quantitative comparison between X-ray and optical images demonstrates that XPCI exhibits much higher resolution in resolving micro cracks and dynamic fracture modes. Multiple predamage and fracture modes of glass samples under dynamic loading are revealed with XPCI to depend on competing nucleation of initial flaws across scales, which give rise to a scattered fracture strength distribution. The fracture strengths increase with increasing strain rates due to accelerated crack propagation and damage growth. Quantitative gray-scale statistical analysis of XPCI and optical images yields spatial and temporal evolutions of damage. Unexpected plateaus essentially without damage growth are observed on the damage curves of glass, deviating from conventional theoretical predictions. The damage plateaus are attributed to growth, closure and re-expansion of inclined main cracks, due to interactions of stress waves with crack tips. In conclusion, the current results also demonstrate a reliable experimental technique for dynamic damage characterization of brittle materials.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ; ORCiD logo [3] ; ORCiD logo [1]
  1. Southwest Jiaotong Univ., Chengdu, Sichuan (China). Key Lab. of Advanced Technologies of Materials, Ministry of Education; Peac Inst. of Multiscale Sciences, Chengdu, Sichuan (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. Peac Inst. of Multiscale Sciences, Chengdu, Sichuan (China)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Journal of Non-Crystalline Solids
Additional Journal Information:
Journal Volume: 494; Journal Issue: C; Journal ID: ISSN 0022-3093
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Key Research and Development Program of China; National Natural Science Foundation of China (NNSFC); USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; conductive glass; damage; dynamic fracture; x-ray imaging
OSTI Identifier:
1475567

Feng, Z. D., Zhou, Y. H., Tan, R., Hou, H. M., Sun, T., Fezzaa, K., Huang, J. Y., and Luo, S. N.. Dynamic damage and fracture of a conductive glass under high-rate compression: A synchrotron based study. United States: N. p., Web. doi:10.1016/j.jnoncrysol.2018.04.030.
Feng, Z. D., Zhou, Y. H., Tan, R., Hou, H. M., Sun, T., Fezzaa, K., Huang, J. Y., & Luo, S. N.. Dynamic damage and fracture of a conductive glass under high-rate compression: A synchrotron based study. United States. doi:10.1016/j.jnoncrysol.2018.04.030.
Feng, Z. D., Zhou, Y. H., Tan, R., Hou, H. M., Sun, T., Fezzaa, K., Huang, J. Y., and Luo, S. N.. 2018. "Dynamic damage and fracture of a conductive glass under high-rate compression: A synchrotron based study". United States. doi:10.1016/j.jnoncrysol.2018.04.030.
@article{osti_1475567,
title = {Dynamic damage and fracture of a conductive glass under high-rate compression: A synchrotron based study},
author = {Feng, Z. D. and Zhou, Y. H. and Tan, R. and Hou, H. M. and Sun, T. and Fezzaa, K. and Huang, J. Y. and Luo, S. N.},
abstractNote = {Dynamic damage and fracture of conductive glass are investigated using a split Hopkinson pressure bar, implemented with in situ X-ray phase contrast imaging (XPCI) and optical imaging for comparison. Quantitative comparison between X-ray and optical images demonstrates that XPCI exhibits much higher resolution in resolving micro cracks and dynamic fracture modes. Multiple predamage and fracture modes of glass samples under dynamic loading are revealed with XPCI to depend on competing nucleation of initial flaws across scales, which give rise to a scattered fracture strength distribution. The fracture strengths increase with increasing strain rates due to accelerated crack propagation and damage growth. Quantitative gray-scale statistical analysis of XPCI and optical images yields spatial and temporal evolutions of damage. Unexpected plateaus essentially without damage growth are observed on the damage curves of glass, deviating from conventional theoretical predictions. The damage plateaus are attributed to growth, closure and re-expansion of inclined main cracks, due to interactions of stress waves with crack tips. In conclusion, the current results also demonstrate a reliable experimental technique for dynamic damage characterization of brittle materials.},
doi = {10.1016/j.jnoncrysol.2018.04.030},
journal = {Journal of Non-Crystalline Solids},
number = C,
volume = 494,
place = {United States},
year = {2018},
month = {5}
}