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Rheological Properties of Polyamide: Experimental Studies and Constitutive Modeling.

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Title: Rheological Properties of Polyamide: Experimental Studies and Constitutive Modeling.
Authors: Suchocki, Cyprian1 cyprian_suchocki@sggw.pl, Molak, Rafał2
Source: Chinese Journal of Polymer Science (Springer Science & Business Media B.V.). Feb2019, Vol. 37 Issue 2, p178-188. 11p.
Subjects: Polyamides, Rheology, Digital image correlation, Stress relaxation (Mechanics), Strain rate
Abstract: 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. [ABSTRACT FROM AUTHOR]
Copyright of Chinese Journal of Polymer Science (Springer Science & Business Media B.V.) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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PubType: Academic Journal
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  Data: Rheological Properties of Polyamide: Experimental Studies and Constitutive Modeling.
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  Data: <searchLink fieldCode="AR" term="%22Suchocki%2C+Cyprian%22">Suchocki, Cyprian</searchLink><relatesTo>1</relatesTo><i> cyprian_suchocki@sggw.pl</i><br /><searchLink fieldCode="AR" term="%22Molak%2C+Rafał%22">Molak, Rafał</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="DE" term="%22Polyamides%22">Polyamides</searchLink><br /><searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br /><searchLink fieldCode="DE" term="%22Digital+image+correlation%22">Digital image correlation</searchLink><br /><searchLink fieldCode="DE" term="%22Stress+relaxation+%28Mechanics%29%22">Stress relaxation (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Strain+rate%22">Strain rate</searchLink>
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  Data: 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Chinese Journal of Polymer Science (Springer Science & Business Media B.V.) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1007/s10118-019-2180-9
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 178
    Subjects:
      – SubjectFull: Polyamides
        Type: general
      – SubjectFull: Rheology
        Type: general
      – SubjectFull: Digital image correlation
        Type: general
      – SubjectFull: Stress relaxation (Mechanics)
        Type: general
      – SubjectFull: Strain rate
        Type: general
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      – TitleFull: Rheological Properties of Polyamide: Experimental Studies and Constitutive Modeling.
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            NameFull: Suchocki, Cyprian
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            NameFull: Molak, Rafał
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              M: 02
              Text: Feb2019
              Type: published
              Y: 2019
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            – TitleFull: Chinese Journal of Polymer Science (Springer Science & Business Media B.V.)
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