Research on the Mechanical Behavior of CFRP Dovetail Structure under the Bending Action of Airdrop Equipment for the Improvement of Comprehensive Support Efficiency

Abstract

Equipment support is the premise and foundation for maintaining and strengthening emergency rescue capabilities.Under the background of informatization and intelligence, airdrop has become a means of efficient equipment supply support coupled with new styles such as coupling joint emergency rescue and distributed support.Considering the comprehensive support requirements of equipment, strengthening the support design of airdrop equipment, planning and developing support resources.This paper focuses on the mechanical behavior of CFRP dovetail structure under the bending action of airdrop equipment, explores the tensile properties of the structure, and designs and manufactures three carbon fiber dovetail structures with different tenon numbers. Four-point bending and three-point bending tests are performed. Combined with the DIC strain test system, the mechanical properties and failure modes of the structure under bending were analyzed, and a finite element progressive damage model was established based on the LaRC05 criterion to analyze the influence of the interlayer bond strength of carbon fiber and different ply angles on its bending performance, so as to provide reference for effectively improving the comprehensive support efficiency of airdrop equipment.