Based On The Optistruct Carbon Fiber Composite Thin-walled Structure Optimization Design Research

Lightweight is the main development direction of the future, and the carbon fibercomposite materials are the most potential lightweight materials. This thesis uses long carbonfiber composite material to a certain special package-case and a car suspension control armstructure design，based on Hyperworkes OptiStruct tool. According to the package-cases andthe car suspension control arm bearing characteristics, two typical load styles take intoconsideration, single uniform pressure load and multi-load step force, in the package-casereinforcement structure optimization design the former load style would be considered, and inthe control arm design the latter was matched, respectively. Then, the scheme of a multi-phaseoptimization design was carried out, based on the ply-up carbon fiber composite materialcharacteristics. The multi-phase optimization scheme in the carbon fiber composite materialpackage-case design mainly contains topography optimization, size optimization and plystacking sequence optimization. In the concept design stage, considering package-casestiffness, the topography optimization is carried out. And in the detail design through the sizeoptimization and stacking sequence optimization won the best layer depth size of each angleand best ply stacking sequence. According to the optimization results，the stiffed structure forthe package-case was designed. At last the FEA was carried out and the results fulfill thedesign requirements. The multi-phase optimization scheme in the carbon fiber compositematerial control arm design mainly contains topology optimization, ply angle optimizationand ply thickness optimization. In the carbon fiber composite material control arm structuredesign, the relationship between composite material properties’parameters such as ply angleor ply thickness and the structure strength and rigid was researched. In the topologyoptimization phase a useful composite material control arm structure was obtained. After that,the ply angle optimization and the ply thickness optimization was implemented which take theply angle and ply thickness as the design variable differently, and the results show a generalrelationship between the design variable and the structure strength and rigid. At last, the bestply angle value and ply thickness value was ascertained.