Abstract
Like other types of elastomers, different geometries of the same cork–rubber material present different mechanical behaviour when subject to compression between bonded plates. To validate the application of Hooke’s Law on cork–rubber materials, under compression at small strains, a set of experimental and numerical analyses has been conducted. Using finite element analysis, a methodology is described to relate frictionless and frictional compression between a cork–rubber sample and loading plates. Based on that, the performance of square cross-section blocks with other dimensions can be evaluated. The results obtained by this approach showed a good agreement with experimental compression tests and with outputs from other models available in the literature relating Young and apparent compression moduli.
Highlights
One of the application areas of cork–rubber-composites is vibration isolation
The maximum error occurs when the geometry considered for the theoretical models and finite-element simulations are not identical-based on the assumption that, in this case, the same shape factor geometries had similar compression behaviour, there seemed to be a good correspondence between results
To determine the axial deformation of cork–rubber square cross-section blocks when subject to compression between two surfaces with frictional contact, a methodology for estimating the relation between Young and apparent compression moduli was presented
Summary
One of the application areas of cork–rubber-composites is vibration isolation. This type of elastomers is composed of a rubber matrix filled with granules of cork, which can be utilised as isolation pads for systems subjected to the presence of dynamic loads, such as buildings, industrial machines and floating floors [1,2]. Other cross-section geometries and loading modes are studied in [22] Another aspect of the relation between moduli noticed, and accounted for in the work of Gent and Lindley [12], was the influence of bulk modulus for blocks with large shape factors. To model the compression behaviour of cork rubber composites, Hooke’s Law was considered, since these materials present a linear region at small strains [22]. These values of deformation usually correspond to the application range of the cork–rubber vibration isolation pads, which simplifies the problem under study. 10%, since all samples demonstrated a linear behaviour until this point
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