TY - JOUR
T1 - Flexural performance of squared one-sided CFRP patches
T2 - modelling and experimental study
AU - Abdelfattah, Ibrahim
AU - Ferreira, Francisca
AU - Nasr Saleh, Mohamed
AU - Reis, Paulo N.B.
AU - Teixeira De Freitas, Sofia
PY - 2022
Y1 - 2022
N2 - Three-point bending analysis, experimental and numerical, is conducted for three different sizes, 30*30 mm, 40*40 mm and 60*60 mm, of one-sided square cross-ply TEXIPREG HS 160 RM carbon-fiber-reinforced polymer (CFRP) patches as well as intact and notched specimens. The tests are carried out with the aim to study the influence of the patch’s size on the flexural properties of the specimen. Hashin-2D damage initiation criterion is adopted to investigate the failure in each ply, and the damage evolution is represented by the stiffness degradation. The intact and notched laminates flexural properties are investigated as well as notch sensitivity. The bonded patch repairs efficiency is investigated in the light of ultimate load, flexural modulus, peel and shear stresses along the bond-line as well as the damage initiation coefficient at critical zones. A significant advancement in the flexural modulus and ultimate load for the repaired laminates is noticed with increasing the patch’s size. A Parametric numerical study is conducted to investigate the influence of the patch size on the damage initiation coefficient at the critical zones. The recommended patch’s size is 44*44 mm in order to avoid failure initiation at the patch corner overlap on the parent laminate.
AB - Three-point bending analysis, experimental and numerical, is conducted for three different sizes, 30*30 mm, 40*40 mm and 60*60 mm, of one-sided square cross-ply TEXIPREG HS 160 RM carbon-fiber-reinforced polymer (CFRP) patches as well as intact and notched specimens. The tests are carried out with the aim to study the influence of the patch’s size on the flexural properties of the specimen. Hashin-2D damage initiation criterion is adopted to investigate the failure in each ply, and the damage evolution is represented by the stiffness degradation. The intact and notched laminates flexural properties are investigated as well as notch sensitivity. The bonded patch repairs efficiency is investigated in the light of ultimate load, flexural modulus, peel and shear stresses along the bond-line as well as the damage initiation coefficient at critical zones. A significant advancement in the flexural modulus and ultimate load for the repaired laminates is noticed with increasing the patch’s size. A Parametric numerical study is conducted to investigate the influence of the patch size on the damage initiation coefficient at the critical zones. The recommended patch’s size is 44*44 mm in order to avoid failure initiation at the patch corner overlap on the parent laminate.
KW - delamination
KW - Destructive testing
KW - epoxy/epoxides
KW - finite element analysis
KW - repair
UR - http://www.scopus.com/inward/record.url?scp=85122865290&partnerID=8YFLogxK
U2 - 10.1080/00218464.2021.2024807
DO - 10.1080/00218464.2021.2024807
M3 - Article
AN - SCOPUS:85122865290
SN - 0021-8464
VL - 99
SP - 473
EP - 491
JO - Journal of Adhesion
JF - Journal of Adhesion
IS - 3
ER -