Journal
COMPOSITE STRUCTURES
Volume 284, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2022.115206
Keywords
Foam filled sandwich panel; Bending properties; Analytical modelling; Mechanical tests
Categories
Funding
- National Natural Science Foun-dation of China [12172140,11402094, 11802100]
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In order to enhance the energy absorption capacity, foam filled composite X-core sandwich panels were fabricated and their bending behaviors were investigated. Analytical and finite element models were developed to predict the performance of the sandwich structures, with higher accuracy achieved by the numerical models.
To enhance the energy absorption capacity of the sandwich structures, the foam filled composite X-core sandwich panels were fabricated by a hot-press molding technology. The bending behaviors of the empty and hybrid composite sandwich panels were investigated by the three-point bending tests. Analytical models and finite element models were developed to characterize the bending behaviors and the interaction effect between the foams and composite members. Generally, the specific bending modulus and strength of composite X-core sandwich structures are comparable to that of the competing cellular structures. The theoretical expressions can provide useful predictions of the bending stiffness and initial failure load, whilst the numerical models had a higher accuracy. A failure mechanism map was constructed to highlight the effect of geometry parameters on the failure modes. A minimum weight design was employed to provide a guideline for obtaining the weight-efficient hybrid composite sandwich panels.
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