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Title: Orientation-dependent tensile deformation and damage of a T700 carbon fiber/epoxy composite: A synchrotron-based study

Abstract

Uniaxial tensile experiments are conducted on a T700 carbon fiber/epoxy composite along various offaxis angles. Stressestrain curves are measured along with strain fields mapped via synchrotron x-ray digital image correlation, as well as computerized tomography. Elastic modulus and tensile strength decrease with increasing off-axis angles, while fracture strain exhibits a nonmonotonic trend as a combined result of tensile strength decrease and fracture mode transition. At high off-axis angles, strain field mapping demonstrates distinct tensile and shear strain localizations and deformation bands approximately along the fiber directions, while deformation is mainly achieved via continuous growth of tensile strain at low off-axis angles. Roughness of fracture planes decreases exponentially as the off-axis angle increases. The stressestrain curves, strain fields, tomography and fractographs show consistent features, and reveal a fracture mode transition from mainly tension (fiber fracture) to in-plane shear (interface debonding).

Authors:
; ; ; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1395878
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 121; Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
Carbon fiber/epoxy composites, Strength anisotropy, X-ray phase contrast imaging, Strain fields Tomography

Citation Formats

Bie, B. X., Huang, J. Y., Fan, D., Sun, T., Fezzaa, K., Xiao, X. H., Qi, M. L., and Luo, S. N. Orientation-dependent tensile deformation and damage of a T700 carbon fiber/epoxy composite: A synchrotron-based study. United States: N. p., 2017. Web. doi:10.1016/j.carbon.2017.05.083.
Bie, B. X., Huang, J. Y., Fan, D., Sun, T., Fezzaa, K., Xiao, X. H., Qi, M. L., & Luo, S. N. Orientation-dependent tensile deformation and damage of a T700 carbon fiber/epoxy composite: A synchrotron-based study. United States. doi:10.1016/j.carbon.2017.05.083.
Bie, B. X., Huang, J. Y., Fan, D., Sun, T., Fezzaa, K., Xiao, X. H., Qi, M. L., and Luo, S. N. Fri . "Orientation-dependent tensile deformation and damage of a T700 carbon fiber/epoxy composite: A synchrotron-based study". United States. doi:10.1016/j.carbon.2017.05.083.
@article{osti_1395878,
title = {Orientation-dependent tensile deformation and damage of a T700 carbon fiber/epoxy composite: A synchrotron-based study},
author = {Bie, B. X. and Huang, J. Y. and Fan, D. and Sun, T. and Fezzaa, K. and Xiao, X. H. and Qi, M. L. and Luo, S. N.},
abstractNote = {Uniaxial tensile experiments are conducted on a T700 carbon fiber/epoxy composite along various offaxis angles. Stressestrain curves are measured along with strain fields mapped via synchrotron x-ray digital image correlation, as well as computerized tomography. Elastic modulus and tensile strength decrease with increasing off-axis angles, while fracture strain exhibits a nonmonotonic trend as a combined result of tensile strength decrease and fracture mode transition. At high off-axis angles, strain field mapping demonstrates distinct tensile and shear strain localizations and deformation bands approximately along the fiber directions, while deformation is mainly achieved via continuous growth of tensile strain at low off-axis angles. Roughness of fracture planes decreases exponentially as the off-axis angle increases. The stressestrain curves, strain fields, tomography and fractographs show consistent features, and reveal a fracture mode transition from mainly tension (fiber fracture) to in-plane shear (interface debonding).},
doi = {10.1016/j.carbon.2017.05.083},
journal = {Carbon},
issn = {0008-6223},
number = C,
volume = 121,
place = {United States},
year = {2017},
month = {9}
}