Abstract:This paper presents the variable鄄stiffness composite laminates with curvilinear fiber placement finite
element modeling method. According to the curvilinear placement rule definition of every unit of the real constant, the
variable鄄stiffness composite laminates with curvilinear fiber placement modeling was established. Bending and compres鄄
sion failure of two kinds of different boundary conditions was discussed, through the Tsai鄄Wu failure criterion, the
maximum inverse strength radio index 1/ R was calculated. Taking 1/ R =1 as the critical load of failure,bending con鄄
dition of critical failure load is increased by 16% and 21%, compression condition of failure load is increased by
51% and 19%. The results show that variable stiffness composite can improve failure properties.
