TY - JOUR
T1 - Damage characteristics in 3D stitched composites with various stitch parameters under in-plane tension
AU - Yudhanto, Arief
AU - Lubineau, Gilles
AU - Ventura, Isaac Aguilar
AU - Watanabe, Naoyuki
AU - Iwahori, Yutaka
AU - Hoshi, Hikaru
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors would like to thank the Tokyo Metropolitan Government for the research funding provided under Asian Network of Major Cities 21 (ANMC-21) project. Part of this research was supported by MUST baseline research funds. We acknowledge the advise from Mr. Ali Moussawi on the DIC technique. We also thank Dr. Karl Leo of the Solar and Photovoltaic Engineering Research Center (SPERC) of MUST for the use of the micro-CF facility.
PY - 2015/4
Y1 - 2015/4
N2 - Three-dimensional (3D) reinforcement by stitching is effective in improving the impact resistance of composites. Stitching, however, adversely affects the composite's in-plane mechanical responses, and alters its damage mechanisms due to stitch-induced irregularities. We experimentally investigate the effect of two important stitch parameters, stitch density and thread diameter, on the damage characteristics of 3D stitched multidirectional composites under in-plane tension using X-ray radiography, X-ray micro-computed tomography and digital image correlation (DIC). Our study shows that composites stitched with thicker thread exhibit improved tensile strength due to effective hindrance of edge-delamination. We also found that stitch thread affects damage behaviors. A higher number of transverse cracks develops in the middle portion of thin 90° fiber tows; the inter-crack distance is reduced by dense stitching. DIC is able to identify the cracks that appear in resin-rich channels and distinguish strain fields due to different stitch densities.
AB - Three-dimensional (3D) reinforcement by stitching is effective in improving the impact resistance of composites. Stitching, however, adversely affects the composite's in-plane mechanical responses, and alters its damage mechanisms due to stitch-induced irregularities. We experimentally investigate the effect of two important stitch parameters, stitch density and thread diameter, on the damage characteristics of 3D stitched multidirectional composites under in-plane tension using X-ray radiography, X-ray micro-computed tomography and digital image correlation (DIC). Our study shows that composites stitched with thicker thread exhibit improved tensile strength due to effective hindrance of edge-delamination. We also found that stitch thread affects damage behaviors. A higher number of transverse cracks develops in the middle portion of thin 90° fiber tows; the inter-crack distance is reduced by dense stitching. DIC is able to identify the cracks that appear in resin-rich channels and distinguish strain fields due to different stitch densities.
UR - http://hdl.handle.net/10754/564115
UR - https://linkinghub.elsevier.com/retrieve/pii/S1359835X14004035
UR - http://www.scopus.com/inward/record.url?scp=84921342211&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2014.12.012
DO - 10.1016/j.compositesa.2014.12.012
M3 - Article
SN - 1359-835X
VL - 71
SP - 17
EP - 31
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -