A new effective phenomenological constitutive model for semi‐crystalline and amorphous polymers

A new phenomenological constitutive model is proposed for the prediction of the tensile and compressive behavior of semi‐crystalline and amorphous polymers. The new model modifies the phenomenological model previously proposed by Zhou and Mallick (ZM model) to correctly predict the complex behavior...

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Bibliographic Details
Published in:Polymer engineering and science 2024-08, Vol.64 (8), p.3730-3750
Main Authors: Iadarola, Andrea, Ciardiello, Raffaele, Paolino, Davide Salvatore
Format: Article
Language:English
Subjects:
Amorphous materials
Compressive properties
constitutive model
Constitutive models
Deformation effects
mechanical behavior
Mechanical tests
Microcomputers
Plastic deformation
Polycarbonates
Polyether ether ketones
Polymer industry
Polymers
Strain hardening
strain rate
temperature
Thermoplastic resins
Thermoplastics
Viscoelasticity
visco‐plastic model
Yield strength
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Summary:A new phenomenological constitutive model is proposed for the prediction of the tensile and compressive behavior of semi‐crystalline and amorphous polymers. The new model modifies the phenomenological model previously proposed by Zhou and Mallick (ZM model) to correctly predict the complex behavior of thermoplastic materials including the linear viscoelastic deformation, the non‐linear viscoelastic deformation, the yielding, the post‐yield strain softening and the post‐yield strain hardening. A validation activity based on literature data has been carried out for polyether‐ether‐ketone (PEEK) and polycarbonate (PC) materials. The new model proved effective in fitting with high accuracy all the phases of the flow stress behavior for the considered materials, across a wide range of strain rates and temperature conditions. Finally, the comparison with Zhu et al., Duan et al., Nasraoui et al., Mulliken‐Boyce and Zhou‐Mallick models showed the better fitting performance of the proposed phenomenological model. Highlights Formulation of a new phenomenological model. Validation on mechanical test of semi‐crystalline and amorphous thermoplastics. Comparison with different phenomenological models present in the literature. Superior prediction results achieved compared to previously developed models. The application of the new phenomenological model proposed and its superior fitting performance with respect to the most recent phenomenological models.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.26808