Rheological Properties of Polyamide: Experimental Studies and Constitutive Modeling

Cyprian Suchocki , Rafał Molak


This work is focused on simulating the rheological effects in polyamide. An experimental study is carried out in order to assess such features of polyamide as: the hysteretic behavior, the strain rate dependence, and the stress relaxation. The material response in tension is investigated. Digital images correlation method (DIC) is employed in order to measure the material compressibility. A newly developed constitutive model, which was previously used to simulate the mechanical response of polyethylene subjected to moderate strains and compressive loadings, is applied to capture the large strain, inelastic behavior of polyamide in tension. The gathered experimental data are utilized to determine the values of constitutive constants of viscoelasticity and plasticity, which describe the rheological properties of polyamide. The determined material parameters are included in the text. Different strategies for evaluating the material parameters are discussed. The proposed constitutive equation is implemented into the finite element (FE) system, ABAQUS, by taking advantage of the user subroutine UMAT, which allows to define custom material laws. Some exemplary FE simulations that were used to investigate the performance of the developed subroutine are described.
Author Cyprian Suchocki
Cyprian Suchocki,,
, Rafał Molak (FME / DMPE)
Rafał Molak,,
- Department of Material and Production Engineering
Journal seriesChinese Journal of Polymer Science, [Chinese Journal of Polymer Science (English Edition)], ISSN 0256-7679, e-ISSN 1439-6203, (N/A 70 pkt)
Issue year2019
Publication size in sheets0.5
Keywords in Englishpolyamide, viscoplasticity, material parameters, finite element method, UMAT
ASJC Classification1500 General Chemical Engineering; 1605 Organic Chemistry; 2507 Polymers and Plastics
Internal identifierROC 19-20
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.691; WoS Impact Factor: 2018 = 2.804 (2) - 2018=1.886 (5)
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