Thermo-viscoelastic and viscoplastic behavior of high-density polyethylene

Drozdov, Aleksey D.; Yuan, Qiang

doi:10.1016/j.ijsolstr.2008.03.008

Cited by 49 publications

(45 citation statements)

References 37 publications

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“…Semicrystalline polymers are often considered as structureless homogeneous continuum with different phenomenological assumptions on the mechanisms and kinetics of plastic deformation [98][99][100][101][102][103][104][105][106][107]. However, structural properties are treated implicitly in this approach.…”

Section: Modeling Of Small-strain Deformation Behavior Of Semicrystalmentioning

confidence: 99%

“…This approach was generalized to the case of equivalent network containing heterogeneous meso-domains of active and passive strands [98,102]. Passive strands were thought to have permanent links and contribute to the elastic response while the active strands were supposed to be connected to the network by temporary junctions representing entanglements of polymer chains or physical crosslinks on lamellar surfaces in accordance with concept of transient networks [145,146].…”

Section: Global Deformation Behavior Of Semicrystalline Polymersmentioning

confidence: 99%

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Structural mechanics of semicrystalline polymers prior to the yield point: a review

Патлажан

Rémond

2012

J Mater Sci

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The review focuses on the current studies of the deformation response and accompanying structural transformations of thermoplastic semicrystalline polymers subjected to uniaxial tension prior to the yield point. The mechanisms of strain-induced cavitation of amorphous layers and damages of crystalline lamellae are analyzed in line with novel results on the deformation behavior of solid polymers at temperatures exceeding the glass transition point. The coupling of viscoelastic and plastic deformation mechanisms with the small-strain structural transformations is critically discussed on the basis of the advanced theoretical modeling of mechanical properties of semicrystalline polymers.

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Section: Modeling Of Small-strain Deformation Behavior Of Semicrystalmentioning

confidence: 99%

Section: Global Deformation Behavior Of Semicrystalline Polymersmentioning

confidence: 99%

Structural mechanics of semicrystalline polymers prior to the yield point: a review

Патлажан

Rémond

2012

J Mater Sci

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“…The incremental strains ε ve,t i j and ε vp,t i j in Equation (34) are defined in Equations (8) and (27 (37) Each component of the Jacobian matrix in Equation (37) is given as follows: …”

Section: Implicit Time-integration Algorithmmentioning

confidence: 99%

“…It is noted that different constitutive material models with strain or strain-rate dependence can be selected to understand non-linear time-dependent and inelastic responses of polymers based on stress relaxation tests, e.g. Drozdov and Christiansen [37]. While several numerical algorithms have been formulated for non-linear VE models and also for the Perzyna's-typed VP constitutive models; however, implicit time-integration algorithms for the combined non-linear VE and VP responses are still lacking.…”

Section: Introductionmentioning

confidence: 99%

A time‐integration method for the viscoelastic–viscoplastic analyses of polymers and finite element implementation

Kim

Muliana

2009

Numerical Meth Engineering

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SUMMARYThe present study introduces a time-integration algorithm for solving a non-linear viscoelastic-viscoplastic (VE-VP) constitutive equation of isotropic polymers. The material parameters in the constitutive models are stress dependent. The algorithm is derived based on an implicit time-integration method (Computational Inelasticity. Springer: New York, 1998) (Computational Inelasticity. Springer: New York, 1998), is also formulated to improve convergence and avoid divergence. Available experimental data on time-dependent and inelastic responses of high-density polyethylene are used to verify the current numerical algorithm. The time-integration scheme is examined in terms of its computational efficiency and accuracy. Numerical FE analyses of microstructural responses of polyethylene reinforced with elastic particle are also presented.

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“…The mechanical properties of such isotropic polyethylene have been examined in several experimental studies [e.g. [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Elastic-Viscoplastic Properties at Finite Strains of Injection-Moulded Low-Density Polyethylene

et al. 2017

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Injection-moulding is one of the most common manufacturing processes used for polymers. In many applications, the mechanical properties of the product is of great importance. Injection-moulding of thin-walled polymer products tends to leave the polymer structure in a state where the mechanical properties are anisotropic, due to alignment of polymer chains along the melt flow direction. The anisotropic elastic-viscoplastic properties of low-density polyethylene, that has undergone an injectionmoulding process, are therefore examined in the present work. Test specimens were punched out from injectionmoulded plates and tested in uniaxial tension. Three in-plane Blekinge Technical University, Karlskrona, Sweden material directions were investigated. Because of the small thickness of the plates, only the in-plane properties could be determined. Tensile tests with both monotonic and cyclic loading were performed, and the local strains on the surface of the test specimens were measured using image analysis. True stress vs. true strain diagrams were constructed, and the material response was evaluated using an elasticviscoplasticity law. The components of the anisotropic compliance matrix were determined together with the directionspecific plastic hardening parameters.

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Thermo-viscoelastic and viscoplastic behavior of high-density polyethylene

Cited by 49 publications

References 37 publications

Structural mechanics of semicrystalline polymers prior to the yield point: a review

Structural mechanics of semicrystalline polymers prior to the yield point: a review

A time‐integration method for the viscoelastic–viscoplastic analyses of polymers and finite element implementation

Anisotropic Elastic-Viscoplastic Properties at Finite Strains of Injection-Moulded Low-Density Polyethylene

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