Stability analysis and optimal design of fiber winding composite circular lattice structure

In order to attain lattice structure with high load-carrying efficiency, stability of fiber winding composite circular lattice structure are analyzed using FEM. Optimal design programme is compiled with the APDL language of ANSYS. Changing law of load-to-mass ratio which is attached to winding angle, aspect ratio, number of loop stiffener and couples of helical stiffener has been researched utilizing the optimal design programme. About the composite lattice structure of D=480mm, H=210mm, and A=28mm2 of stiffener cross section area; the better design parameters from the theory are concluded, aspect ratio is 7:4, winding angle is 30 degree, helical stiffener number is 51couples, and hoop stiffener number is 3 strips. In the end, the composite lattice structure of corresponding size is made according to the result of optimal design, and is experimented in the axial compression load on the INSTRON1346 material fatigue strength test machine. As a result, limit axial compression load of composite lattice structure can be efficiently forecasted with FEM, and optimal design can be efficiently carried.