TY - CONF
T1 - Dic deformation measurement in cracked cfrp cross-ply laminates
AU - Mohammad Fikry, M. J.
AU - Ogihara, Shinji
AU - Vinogradov, Vladimir
N1 - Funding Information:
The author would like to acknowledge the collaboration and advice of Mr. R. Norgren, Dr. B. Mayall, Mr. G. Johnson, Dr. R. Jensen, and Mr. J. Zumstein, of the Biomedical Sciences Division of Lawrence Livermore National Laboratory, Livermore, California. This work was partially supported by the U.S. National Cancer Institute under Grant CA-28833.
Publisher Copyright:
© 2019 International Committee on Composite Materials. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Digital Image Correlation (DIC) is a non-contact method to analyse the deformation of materials that can measure displacement or strain behaviour during tensile loading. In this study, DIC is used to measure the deformation of cross-ply carbon fibre reinforced plastics (CFRP) laminates and for the detection of damages in them. The objective of this study is to measure the deformation around the damages in cross-ply CFRP laminates by using the DIC system from both width and thickness directions. For this purpose, thick CFRP [04/9024]s and thinner [0/906]s laminates were tested. In cross-ply laminates, usually a straight transverse crack will initially occur in 90 degree ply followed by the following damages such as delamination, fiber fracture, and etc. To start, straight transverse cracks are induced in the laminates by using an artificial crack method. Then, X-ray radiography is used to detect the location of the straight cracks in order to be used for DIC observation to examine the strain distribution around the existed cracks. The DIC observation from the surface of the laminate around the cracks area clearly showed how strain is distributed from one crack to another adjacent crack. From the result, secondary mode damages of matrix cracking such as oblique and curved cracks can also be observed and are being discussed in this paper.
AB - Digital Image Correlation (DIC) is a non-contact method to analyse the deformation of materials that can measure displacement or strain behaviour during tensile loading. In this study, DIC is used to measure the deformation of cross-ply carbon fibre reinforced plastics (CFRP) laminates and for the detection of damages in them. The objective of this study is to measure the deformation around the damages in cross-ply CFRP laminates by using the DIC system from both width and thickness directions. For this purpose, thick CFRP [04/9024]s and thinner [0/906]s laminates were tested. In cross-ply laminates, usually a straight transverse crack will initially occur in 90 degree ply followed by the following damages such as delamination, fiber fracture, and etc. To start, straight transverse cracks are induced in the laminates by using an artificial crack method. Then, X-ray radiography is used to detect the location of the straight cracks in order to be used for DIC observation to examine the strain distribution around the existed cracks. The DIC observation from the surface of the laminate around the cracks area clearly showed how strain is distributed from one crack to another adjacent crack. From the result, secondary mode damages of matrix cracking such as oblique and curved cracks can also be observed and are being discussed in this paper.
KW - Cross-ply laminates
KW - DIC
KW - Matrix cracks
KW - Secondary damage mode
UR - http://www.scopus.com/inward/record.url?scp=85097353955&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85097353955
T2 - 22nd International Conference on Composite Materials, ICCM 2019
Y2 - 11 August 2019 through 16 August 2019
ER -