TY  - JOUR
TI  - Open hole size effects on tensile properties of 3D braided composites
AU  - Liang, Shuangqiang
AU  - Zhou, Qihong
AU  - Chen, Ge
T2  - Industria Textila
AB  - Owing to the excellent integrated structure, notch-insensitivity, delamination-free characteristics, 3D braided composites
have  a  broad  range  of  engineering  applications.  In  this  paper,  the  notch  size  effects  on  two  types  of  3D  braided
composites were experimentally examined. Style I incorporated 40% of longitudinal lay-in yarns. Style II was the pure
braids. The Point Stress Criterion (PSC) was applied to predict the open-hole strength of 3D braided composites. It is
found the 3D braided composites can keep higher proportion residual strength after involving the different circular hole
sizes compared to plain woven laminates. The open-hole pure braided specimen shows better performance than that
the braids with longitudinal yarns, the lay-in longitudinal yarns improve neither specimens’ un-notched strength, nor the
modulus. The predicted open-hole strength were compared with experimental results. The traditional analytical method
can  predict  the  open-hole  strength  of  3D  braided  composite  to  some  extent.  Under  uniaxial  tensile  stress,  the  failure
behaviour of two types of 3D braided specimens are different. For un-notched specimen, clear cracks usually show up
on  the  Style  II  specimen,  while  it  is  not  true  for  Style  I  coupon.  For  notched  specimen,  the  crack  of  both  notched
specimens will propagate along the notch and finally render the specimen to fail
DA  - 2021/10/30/
PY  - 2021
DO  - 10.35530/IT.072.05.202010
DP  - DOI.org (Crossref)
VL  - 72
IS  - 05
SP  - 545
EP  - 551
SN  - 12225347
UR  - http://revistaindustriatextila.ro/images/2021/5/011%20SHUANGQIANG%20LIANG%20Industria%20Textila%20no%205_2021.pdf
Y2  - 2021/10/31/11:27:35
ER  -