Anisogrid lattice cylinders made of thermoplastic composite under buckling loading
| Autor: | Loredana Santo, Daniele Santoro, Leandro Iorio, Claudia Papa, Denise Bellisario, Nicola Gallo, Marco Regi, Fabrizio Quadrini |
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| Rok vydání: | 2021 |
| Předmět: |
Polypropylene
chemistry.chemical_classification Materials science Thermoplastic Buckling test Glass fiber Composite number Stiffness Settore ING-IND/16 Molding (process) Finite element method Out-of-autoclave process chemistry.chemical_compound Buckling chemistry Anisogrid lattice structures medicine Thermoplastic composite Composite material medicine.symptom Finite element model |
| Zdroj: | ESAFORM 2021. |
| DOI: | 10.25518/esaform21.2798 |
| Popis: | Anisogrid lattice cylinders have been produced by means of an innovative out-of-autoclave (OOA) process by using thermoplastic prepreg. Unidirectional thermoplastic tapes with polypropylene matrix and glass fibers were wound on cylindrical mandrels at room temperature. Composite consolidation was achieved by using the compression of a heat-shrink tube during its shape recovery in oven. A cylindrical anisogrid lattice structure was manufactured and mechanically tested under vertical loading. Results from the buckling test revealed the optimal adhesion between prepreg layers after the out-of-autoclave molding. Numerical modelling of buckling has been performed to correlate the structural behavior of the anisogrid lattice cylinder with composite material properties and geometrical features. A parametric model of the lattice structure has been defined for this aim. The proposed manufacturing technology combines the advantages of thermoplastic composites (reparability, easy handling, easy storage, long prepreg life, productivity) with the designing potential of anisogrid lattice structures in terms of lightness and stiffness. |
| Databáze: | OpenAIRE |
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