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Inicio  /  Applied Sciences  /  Vol: 13 Par: 4 (2023)  /  Artículo
ARTÍCULO
TITULO

Mechanical Characterization of a Polymer/Natural Fibers/Bentonite Composite Material with Implementation of a Continuous Damage Model

Meylí Valin Fernández    
José Luis Valin Rivera    
Frank Pérez Rodríguez    
Henry Figueredo Losada    
María Elena Fernández Abreu    
Francisco Rolando Valenzuela Diaz    
Angel Rodríguez Soto    
Alexander Alfonso Alvarez    
Roberto Quinteros    
Cristobal Galleguillos Ketterer and Gilberto García del Pino    

Resumen

A characterization of composite materials of a polyester matrix reinforced with natural fibers of Cuban henequen and organophilized Cuban bentonite was carried out, the experimental results of which are used to formulate, implement, and validate a scalar damage model. The fibers were added on a weight basis of 15, 20, and 25% as a reinforcing material, and organophilized Cuban bentonite, in amounts of 3, 5, and 7% by weight, was added. Samples containing only polymer and fibers showed the best mechanical performance for 25% of fiber, with increases of 51% in the tensile strength and 169% on the impact resistance. Samples containing polymer and clay showed the best results for 5% of bentonite, with increases of 89% in the tensile strength and 83% on the impact resistance, and samples containing 25% fiber and 5% clay were also prepared and achieved a 98% increase in the tensile strength and 219% in the impact strength. The scalar damage model deals with an internal variable, which corresponds to the damage variable, together with a failure surface that allows identifying the mechanical state of the material dependent on the mechanical stress, obtaining an adequate correlation with the results of the experimental tests.

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