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The bistable deployable composite boom (Bi-DCB) can realize the bistablefunction by storing and releasing strain energy, which has a good applicationprospect in the aerospace field. In this paper, the folding stable state of theBi-DCB was investigated using experimental and numerical approaches. Using thevacuum bag method, six Bi-DCB specimens were prepared. Bistable experiments ofBi-DCB specimens were conducted and linear fitting with Archimedes' helix wasperformed to determine the folding stable configuration. In addition, twoFinite Element Models (FEMs) were established for predicting the folding stablestate of the Bi-DCB. Two classical failure criteria were utilized to analyzethe stress level of the folding stable state of the Bi-DCB. Numerical resultsof two FEMs agreed well with experimental results, including the bistabledeformation process and the folding stable state.

Experimental and numerical investigation on folding stable state of bistable deployable composite boom