Numerical Simulation And Development Of Analysis Software About Braided Composite Materials Transmission Shaft

Automotive drive shaft is mainly used to transmit torque, bearing great torque during operation. The traditional composite material drive shaves are mostly designed based on classical laminated theory, which have some defect such as easily separate between the fiber layers, low damage tolerance and in-homogeneous mechanical properties on surface.In order to improve the composite driving shaft torsion resistance capacity and the inner laminar shear strength, this paper uses three-dimensional woven structure which is overall structural as reinforcement of composite material, which effectively improve the shear strength of shaft and have greater features than laminated material. Drive shaft of braided composite is made by 3D Braiding Technology and RTM process. Because the 3D weaving technology can form a integral structure in which fiber bundle interweave with each other in space, there is not layer in it, at the same time, it enhances the damage and impact resistance and performance in every directions can be designed according to need.So, it is great significance to establish parametric mode of drive shaft of braided composite and numerical simulation.This paper takes a certain type of transmission shaft as the research object. Firstly,with the APDL language and Domain Superposition Technique, the parametric finite element model of drive shaft of braided composite is established, which include 3-D braided structure and the resin matrix. Then, static analysis and modal analysis of drive shaft of braided composite are performed. The Tsai-Wu criterion is used to drive shaft failure judgment, witch provides a theoretical basis for the design of the drive shaft. Next,the research of the relationship between braiding angle and torsional properties is done and the relationship between speed and natural frequency are completed; Finally, the finite element analysis software of drive shaft of braided composite is developed which is based on Basic Visual 6.0. This software transforms cumbersome operation to visualization window, and realizes the function of modify the parameters, mechanical analysis, modal analysis,and generate analysis results report by calling the ANSYS software on background.