Paper number 194
|TIME-DEPENDENT BEHAVIOR OF TRANSVERSE CRACKING IN CFRP CROSS-PLY LAMINATES|
Keiji Ogi and Yoshihiro Takao
Research Institute for Applied Mechanics, Kyushu University
6-1, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
|Summary||A model is developed to predict the transverse crack density and strain response in a cross-ply laminate under monotonic, bilinear and dead loading. First, the strain response of the cross-ply laminate with transverse cracking is presented based on the viscoelasticity theory and shear lag analysis. The transverse crack density is given as a function of both time and stress using a probabilistic failure concept. Secondly, monotonic tensile tests, bilinear tensile tests and dead load tests of cross-ply laminates are carried out to measure the strains and transverse crack density. Finally, the predicted strains and crack density are compared with the experimental ones to verify the validity of the present model. The present model provides good agreement with the experimental results.
||Keywords|| transverse cracking, time-dependent, viscoelasticity, shear lag, probabilistic failure, creep.
Theme : Mechanical and Physical Properties ; Creep and Viscoelastic Behaviour
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