In the last decades fossil derived plastics played an important role in our daily life because of their low cost and their wide used. The alternative offered by bio-plastics requires larger costs. Following the paradigma of the circular economy, one of the adopted strategies to reduce fossil-based plastics, and produce objects that are economically competitive, is to mix bio-plastics with some fillers obtained as by-products of industrial plants. Besides the mechanical properties these bio compounds are drastically worsened, on the other hand the production of these bio compounds allows to re-use agro-food wastes, reduce the amount of bioplastics from fossil source. Moreover, these bio- compounds show better mechanical performance respect to other ones studied in literature [1-3]. Our interest is focused on the mathematical modelling of the mechanical properties measured by tensile testing; in particular, we studied the tensile behaviour of such materials as a function of the filler concentration. To model the variation of Tensile Strength and Elastic Modulus, Stress-Strain curves are fitted with a nonlinear equation with 2 parameters; this allows us to obtain a simple expression for the dependence of the stress upon the filler concentration.
Mathematical modelling of the tensile mechanical behavior of biocomposite based on bioplastics and agri-food wastes.
scolaro cristina;Ruta aldo jesus
;visco annamaria;Oliveri francesco;Brahimi Salim.
2024-01-01
Abstract
In the last decades fossil derived plastics played an important role in our daily life because of their low cost and their wide used. The alternative offered by bio-plastics requires larger costs. Following the paradigma of the circular economy, one of the adopted strategies to reduce fossil-based plastics, and produce objects that are economically competitive, is to mix bio-plastics with some fillers obtained as by-products of industrial plants. Besides the mechanical properties these bio compounds are drastically worsened, on the other hand the production of these bio compounds allows to re-use agro-food wastes, reduce the amount of bioplastics from fossil source. Moreover, these bio- compounds show better mechanical performance respect to other ones studied in literature [1-3]. Our interest is focused on the mathematical modelling of the mechanical properties measured by tensile testing; in particular, we studied the tensile behaviour of such materials as a function of the filler concentration. To model the variation of Tensile Strength and Elastic Modulus, Stress-Strain curves are fitted with a nonlinear equation with 2 parameters; this allows us to obtain a simple expression for the dependence of the stress upon the filler concentration.Pubblicazioni consigliate
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