Cyclic viscoplasticity of semicrystalline polymers with finite strains: Observations and constitutive modeling

A. D. Drozdov; N. Dusunceli; R. Klitkou; J. Dec Christiansen

doi:10.1142/S2047684112500376

Cyclic viscoplasticity of semicrystalline polymers with finite strains: Observations and constitutive modeling

A. D. Drozdov, N. Dusunceli, R. Klitkou, J. Dec Christiansen

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Observations are reported on low density polyethylene and isotactic polypropylene in uniaxial tensile cyclic tests (oscillations between maximum elongation ratios k_max and the zero minimum stress σ_min with k_max increasing monotonically with number of cycles). Constitutive equations are developed in cyclic viscoplasticity of semicrystalline polymers with finite strains. Adjustable parameters in the stress-strain relations are found by fitting the experimental data. Ability of the model to describe the characteristic features of the mechanical behavior and to predict the viscoplastic response in cyclic tests is confirmed by comparison of the results of numerical simulation with observations in additional tests.

Original language	English
Article number	1250037
Journal	International Journal of Computational Materials Science and Engineering
Volume	1
Issue number	4
DOIs	https://doi.org/10.1142/S2047684112500376
State	Published - 1 Dec 2012
Externally published	Yes

Keywords

constitutive modeling
cyclic viscoplasticity
finite deformations
Isotactic polypropylene
low density polyethylene

ASJC Scopus subject areas

Numerical Analysis
Modeling and Simulation
General Materials Science
Mechanics of Materials
Computer Science Applications

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title = "Cyclic viscoplasticity of semicrystalline polymers with finite strains: Observations and constitutive modeling",

abstract = "Observations are reported on low density polyethylene and isotactic polypropylene in uniaxial tensile cyclic tests (oscillations between maximum elongation ratios kmax and the zero minimum stress σmin with kmax increasing monotonically with number of cycles). Constitutive equations are developed in cyclic viscoplasticity of semicrystalline polymers with finite strains. Adjustable parameters in the stress-strain relations are found by fitting the experimental data. Ability of the model to describe the characteristic features of the mechanical behavior and to predict the viscoplastic response in cyclic tests is confirmed by comparison of the results of numerical simulation with observations in additional tests.",

keywords = "constitutive modeling, cyclic viscoplasticity, finite deformations, Isotactic polypropylene, low density polyethylene",

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AU - Drozdov, A. D.

AU - Dusunceli, N.

AU - Klitkou, R.

AU - Christiansen, J. Dec

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N2 - Observations are reported on low density polyethylene and isotactic polypropylene in uniaxial tensile cyclic tests (oscillations between maximum elongation ratios kmax and the zero minimum stress σmin with kmax increasing monotonically with number of cycles). Constitutive equations are developed in cyclic viscoplasticity of semicrystalline polymers with finite strains. Adjustable parameters in the stress-strain relations are found by fitting the experimental data. Ability of the model to describe the characteristic features of the mechanical behavior and to predict the viscoplastic response in cyclic tests is confirmed by comparison of the results of numerical simulation with observations in additional tests.

AB - Observations are reported on low density polyethylene and isotactic polypropylene in uniaxial tensile cyclic tests (oscillations between maximum elongation ratios kmax and the zero minimum stress σmin with kmax increasing monotonically with number of cycles). Constitutive equations are developed in cyclic viscoplasticity of semicrystalline polymers with finite strains. Adjustable parameters in the stress-strain relations are found by fitting the experimental data. Ability of the model to describe the characteristic features of the mechanical behavior and to predict the viscoplastic response in cyclic tests is confirmed by comparison of the results of numerical simulation with observations in additional tests.

KW - constitutive modeling

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KW - finite deformations

KW - Isotactic polypropylene

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Cyclic viscoplasticity of semicrystalline polymers with finite strains: Observations and constitutive modeling

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