TY - JOUR
T1 - Effect of stitch density on fatigue characteristics and damage mechanisms of stitched carbon/epoxy composites
AU - Yudhanto, Arief
AU - Watanabe, Naoyuki
AU - Iwahori, Yutaka
AU - Hoshi, Hikaru
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Authors would like to thank Tokyo Metropolitan Government under the project of Asian Network of Major Cities 21 (ANMC21) for the financial support.
PY - 2014/5
Y1 - 2014/5
N2 - The effect of stitch density (SD) on fatigue life, stiffness degradation and fatigue damage mechanisms in carbon/epoxy (T800SC/XNRH6813) stitched using Vectran thread is presented in this paper. Moderately stitched composite (SD = 0.028/mm2; 'stitched 6 × 6') and densely stitched composite (SD = 0.111/mm2; 'stitched 3 × 3') are tested and compared with composite without stitch thread (SD = 0.0; 'unstitched'). The experiments show that the fatigue life of stitched 3 × 3 is moderately better than that of unstitched and stitched 6 × 6. Stitched 3 × 3 pattern is also able to postpone the stiffness degradation onset. The improvement of fatigue properties and postponement of stiffness degradation onset in stitched 3 × 3 is primarily due to an effective impediment of edge-delamination. Quantification of damage at various cycles and stress levels shows that stitch density primarily affects the growth rate of delamination. © 2014 Elsevier Ltd. All rights reserved.
AB - The effect of stitch density (SD) on fatigue life, stiffness degradation and fatigue damage mechanisms in carbon/epoxy (T800SC/XNRH6813) stitched using Vectran thread is presented in this paper. Moderately stitched composite (SD = 0.028/mm2; 'stitched 6 × 6') and densely stitched composite (SD = 0.111/mm2; 'stitched 3 × 3') are tested and compared with composite without stitch thread (SD = 0.0; 'unstitched'). The experiments show that the fatigue life of stitched 3 × 3 is moderately better than that of unstitched and stitched 6 × 6. Stitched 3 × 3 pattern is also able to postpone the stiffness degradation onset. The improvement of fatigue properties and postponement of stiffness degradation onset in stitched 3 × 3 is primarily due to an effective impediment of edge-delamination. Quantification of damage at various cycles and stress levels shows that stitch density primarily affects the growth rate of delamination. © 2014 Elsevier Ltd. All rights reserved.
UR - http://hdl.handle.net/10754/563517
UR - https://linkinghub.elsevier.com/retrieve/pii/S1359835X1400027X
UR - http://www.scopus.com/inward/record.url?scp=84894487192&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2014.01.013
DO - 10.1016/j.compositesa.2014.01.013
M3 - Article
SN - 1359-835X
VL - 60
SP - 52
EP - 65
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -