Evaluating the Guo–Campanella viscoelastic model

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Augusto P.E.D.
Miano A.C.
Rojas M.L.
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Blackwell Publishing Ltd
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Biological materials are characterized by complex structures and compositions, leading to viscoelastic behavior. Their viscoelastic characterization is important for the evaluation, design, and optimization of processes to ensure high quality products. Proposals of methodologies of analysis and modeling are critical steps in studying the rheological properties of these materials. In this context, a new model, the Guo-Campanella Model, was recently proposed to describe the stress-relaxation behavior of biological material. This work is an independent and impartial evaluation of this new model. It considers 10 different samples, comprising in natura and processed foods, from both plant and animal bases. For comparison, a Generalized Maxwell Model and the Peleg Model were also evaluated. The Guo-Campanella Model fitted the stress-relaxation data of evaluated products well, demonstrating its validity for describing the viscoelastic behavior of biological materials with different structures, sources, and processing. Finally, the Guo-Campanella Model parameters were evaluated and their interpretations and possible uses described. It was shown that the Guo-Campanella Model can be successfully used for future studies.
The authors are grateful to the National Council for Scientific andTechnological Development (CNPq, Brazil) for funding the project n8401004/2014–7 and Cienciactiva from the“Consejo Nacional deCiencia, Tecnología e Inovaci on Tecnol ogica”(CONCYTEC, Peru) forthe A.C. Miano (Contract 272–2015-FONDECYT) and M.L. Rojas(Contract 087–2016-FONDECYT) Ph.D. scholarships.
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