TY - JOUR
T1 - Shear induced toughening in bonded joints
T2 - experiments and analysis
AU - Swadener, J.G.
AU - Liechti, K.M.
AU - Liang, Y.-M.
N1 - Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/3/1
Y1 - 2002/3/1
N2 - Bonded joint specimens were fabricated from composite adherends and either an epoxy or a urethane adhesive. In mixed-mode fracture experiments, the epoxy bonded specimens generally failed by subinterfacial fracture in the composite, while specimens bonded with urethane failed very close to the adhesive/substrate interface. For the epoxy bonded specimens, fracture toughness did not change significantly with mode-mix, but for urethane bonded joints, fracture toughness increased with increasing shear load. Finite element analysis, which modeled specimens bonded with the two adhesives, showed similar trends. The different toughening behaviors for the two bonded joints can be attributed to dissipation of energy through inelastic deformation, which was insignificant in the epoxy-bonded joints but substantial when the urethane was used as the bonding agent.
AB - Bonded joint specimens were fabricated from composite adherends and either an epoxy or a urethane adhesive. In mixed-mode fracture experiments, the epoxy bonded specimens generally failed by subinterfacial fracture in the composite, while specimens bonded with urethane failed very close to the adhesive/substrate interface. For the epoxy bonded specimens, fracture toughness did not change significantly with mode-mix, but for urethane bonded joints, fracture toughness increased with increasing shear load. Finite element analysis, which modeled specimens bonded with the two adhesives, showed similar trends. The different toughening behaviors for the two bonded joints can be attributed to dissipation of energy through inelastic deformation, which was insignificant in the epoxy-bonded joints but substantial when the urethane was used as the bonding agent.
KW - fracture
KW - adhesively bonded joints
KW - cohesive zone model
KW - geometric moiré
KW - finite element analysis
KW - mixed-mode fracture toughness
UR - http://www.scopus.com/inward/record.url?scp=0036506592&partnerID=8YFLogxK
UR - http://link.springer.com/article/10.1023%2FA%3A1015013618976
U2 - 10.1023/A:1015013618976
DO - 10.1023/A:1015013618976
M3 - Article
AN - SCOPUS:0036506592
SN - 0376-9429
VL - 114
SP - 113
EP - 132
JO - International Journal of Fracture
JF - International Journal of Fracture
IS - 2
ER -