TY - JOUR
T1 - Predicting the strength of adhesively bonded joints of variable thickness using a cohesive element approach
AU - Lee, Mildred
AU - Yeo, Eudora
AU - Blacklock, Matthew
AU - Janardhana, Madabhushi
AU - Feih, Stefanie
AU - Wang, Chun H.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - One major characteristic of bonded structures is the highly localised nature of deformation near sharp corners, ply-terminations, and ends of joints where load transfer occurs. This paper presents an investigation of the use of a cohesive zone model in predicting the strong effects of stress concentration due to varying adherend thickness on the pull-off strength measured by the Pneumatic Adhesion Tensile Testing Instrument. A comparison is made with the point-strain-at-a-distance criterion, where the plastic deformation of the adhesive is analysed using a modified Drücker-Prager/cap plasticity material model. The fracture properties of the cohesive zone model were determined using double-cantilever and end-notch flexural specimens, and the cohesive strengths were measured using tensile and lap shear tests. Comparisons with experimental results reveal that the cohesive zone model with perfectly plastic (or non-strain-softening) cohesive law provides accurate predictions of joint strengths.
AB - One major characteristic of bonded structures is the highly localised nature of deformation near sharp corners, ply-terminations, and ends of joints where load transfer occurs. This paper presents an investigation of the use of a cohesive zone model in predicting the strong effects of stress concentration due to varying adherend thickness on the pull-off strength measured by the Pneumatic Adhesion Tensile Testing Instrument. A comparison is made with the point-strain-at-a-distance criterion, where the plastic deformation of the adhesive is analysed using a modified Drücker-Prager/cap plasticity material model. The fracture properties of the cohesive zone model were determined using double-cantilever and end-notch flexural specimens, and the cohesive strengths were measured using tensile and lap shear tests. Comparisons with experimental results reveal that the cohesive zone model with perfectly plastic (or non-strain-softening) cohesive law provides accurate predictions of joint strengths.
KW - Cohesive model
KW - Failure criterion
KW - Stress concentration
U2 - 10.1016/j.ijadhadh.2015.01.006
DO - 10.1016/j.ijadhadh.2015.01.006
M3 - Article
AN - SCOPUS:84965161105
VL - 58
SP - 44
EP - 52
JO - International Journal of Adhesion and Adhesives
JF - International Journal of Adhesion and Adhesives
SN - 0143-7496
ER -