关键词: 外骨骼关节, 复合材料, 结构-关节一体化

Abstract: This article proposes a new structural joint integration configuration scheme and establishes a nonlinear analytical model for the bending process of C-shaped composite material tape springs. By utilizing the buckling and subsequent buckling phenomena of plates and shells, the basic configuration of composite material structure joint integration is designed. Through the principle of minimum potential energy, the recovery bending moment of the composite material structure joint integration configuration during the bending process is derived, a mapping relationship has been established between the geometric parameters of the integrated joint, material mechanical performance parameters, and the assistance effect (recovery torque). Using a non-contact full field deformation measurement system, an experimental platform was established to verify the theoretical results of the assistance effect. Combined with the finite element progressive damage failure analysis method, the mechanical behavior and material damage evolution mode of the composite structure integrated joint under quasi-static folding were studied. Further research was conducted on the impact of different geometric parameters on the stability support and assistance effects of integrated joints. This exploratory study can significantly reduce the number of parts, reduce the weight of the structure, and reduce the processing cost of the product while meeting the basic functional requirements of the unpowered backpack exoskeleton structure joint system in the early stage.

Key words: exoskeleton joints, composite materials, structure joint integration