Connection Enhancement Method and Its Verification for Spacecraft Composite Truss
When the main bearing composite truss of large spacecraft is subjected to excessive axial tensile load locally,there is a pulling failure risk for bar and joint.Based on layered failure mech-anism of truss adhesive,three kinds of adhesive reinforcement design schemes are proposed:out-er sleeve reinforcement,conical fit reinforcement,and combination reinforcement.By optimizing the force transmission path,the goal of reducing interlayer stress is achieved.Corresponding specimens are put into production to carry out performance tests.Experimental results show that the adhesive reinforced design scheme can effectively increase the bearing capacity by 33%～66%,and the ultimate pull-out force can reach 200kN,which can provide useful reference for the development of the main bearing truss of large spacecraft.
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