Abstract
The present work consists of a contribution in modeling the mechanical behavior of cork in compression. For this purpose, compression tests are performed in the non-radial direction on high density reproduction cork samples. Cork shows stress-strain curves, typical of cellular materials, characterized by an elastic slope followed by an important plateau corresponding to buckling of cells; and finally hardening due to the densification of the material. Two behavior models are proposed to represent this behavior. A trilinear model in which each slope represents one of the three domains and whose parameters are identified directly from the stress-strain curves. A more nonlinear model corresponding to a third-order polynomial whose parameters are identified by means of a polynomial regression. Test-model comparisons reveal little relevance of the results given by the trilinear model whereas a very good consistency is observed for the results given by the nonlinear model.
Highlights
C hoosing the right materials to use to perform specific functions is always a very important step
The results show that the radial direction has the greatest compressive strength while the resistance in the axial and tangential directions is almost similar
The present work is a contribution in the modeling of the mechanical behavior of cork in compression
Summary
C hoosing the right materials to use to perform specific functions is always a very important step. The behavior of the tensile cork in the tangential and axial direction has been studied respectively in the references [12, 13]. In comparison with its compression behavior, cork has a lower tensile elastic domain This area is around 2% in both tangential and axial directions. Many studies have focused on the analysis of cork behavior through its parameters such as the Young's modulus, the elastic limit and the stresses corresponding to certain critical strain values [5, 7,8,9, 11,12,13].
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