Testing and analysis of solid polymers under large monotonic and long-term cyclic deformation

Barrière, Thierry; Gabrion, Xavier; Holopainen, Sami; Jokinen, Jarno

doi:10.1016/j.ijplas.2020.102781

Cited by 20 publications

(24 citation statements)

References 38 publications

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“…For PDMS meso‐level tensile testing, it is evident that they are susceptible to stress relaxation and strain hardening 26 when subjected to cyclic stretching ≤20%, primarily stemming from the dynamics of the macromolecular polymer chains: movement, interactions, and subsequent reorganization 27 . Figure 5a elucidates the entanglement of macromolecular chains along the gauge length of a tensile sample, postulating an idealized scenario wherein all chains, uniform in size, exhibit unrestricted mobility and are oriented parallel to the stretching direction.…”

Section: Resultsmentioning

confidence: 99%

“…For PDMS meso-level tensile testing, it is evident that they are susceptible to stress relaxation and strain hardening 26 when subjected to cyclic stretching ≤20%, primarily stemming from the dynamics of the macromolecular polymer chains: movement, interactions, and subsequent reorganization. 27 unrestricted mobility and are oriented parallel to the stretching direction.…”

Section: Mechanisms Of Time-dependent Deformation At Meso-and Micro-l...mentioning

confidence: 99%

See 1 more Smart Citation

Multiscale mechanics of polydimethylsiloxane: A comparison of meso‐ and micro‐cyclic deformation behavior

Lou,

Bacca,

et al. 2024

J of Applied Polymer Sci

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Despite plenty of static and dynamic mechanical measurements and modeling for bulk polydimethylsiloxane (PDMS) specimens, a notable gap exists in comprehensively understanding the dynamic mechanics under large cycle, low strain conditions, especially for microscale samples. This study integrates tensile testing and nanoindentation techniques to compare dynamic mechanical response for bulk PDMS samples and μ‐pillars. The results from cyclic tensile testing, which involved up to 10,000 cycles at a strain range of 10%–20%, indicate a stabilization of energy dissipation rate after the initial 25 cycles. This attributes to stress relaxation and strain hardening, validating by rapid dual‐phase exponential decay in maximum stress, coupled with an incremental increase in elastic modulus. In comparison to tensile testing, μ‐pillars exhibited a 0.82% reduction in stiffness, stabilizing ~600th cycle. Concurrently, there was an approximately twofold increase in approaching distance during the initial 120 cycles, and an approximately fourfold increase in dissipated energy over the first 80 cycles, before reaching a plateau. This lagging hysteresis effect attributes to the distribution of the resultant force, including top tension, bottom compression, and base tilt. Overall, this study illuminates temporal mechanical deformations in PDMS under two application scenarios, enhancing our understanding of PDMS mechanical behavior.

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Section: Resultsmentioning

confidence: 99%

Section: Mechanisms Of Time-dependent Deformation At Meso-and Micro-l...mentioning

confidence: 99%

Multiscale mechanics of polydimethylsiloxane: A comparison of meso‐ and micro‐cyclic deformation behavior

Lou,

Bacca,

et al. 2024

J of Applied Polymer Sci

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show abstract

“…Although the paper presents a numerical implementation of the simplest viscoelastic model (standard model of elastomers), more complex models with a wide range of relaxation times can be implemented using Prony series in the same way. Moreover, many-body formulation of element-element interaction makes it possible to implement complex rheological models including viscoelasticity in the integral form with relaxation core functions R(t) [25], combined visco-elastic-plastic models [26][27][28] and coupled thermomechanical models (with the temperature dependence of dynamic viscosity [29]).…”

Section: Discussionmentioning

confidence: 99%

The development of the formalism of movable cellular automata for modeling the nonlinear mechanical behavior of viscoelastic materials

Shilko¹,

Dudkin²,

Grigoriev³

2019

EPJ Web Conf.

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The paper is devoted to the development of the formalism of the computational method of discrete elements (DEM) for describing the mechanical behavior of consolidated viscoelastic materials. We considered an advanced implementation of DEM, namely, the method of movable cellular automata (MCA). A feature of this implementation of DEM is the use of a generalized many-body formulation of the relations for the forces of element-element interaction. 3D numerical models of viscoelastic material with a spectrum of relaxation times (Kelvin and Maxwell models, the standard model of elastomers, and others) were developed within the formalism of MCA. The correctness of the developed discrete element formalism and its applicability for modeling the processes of deformation and fracture of viscoelastic materials under dynamic loading are shown using the standard model of elastomers as an example. The relevance of the results is determined by the prospects for the further development of DEM and its application to study and predict the mechanical response of viscoelastic materials of various nature under dynamic loading including contact problems.

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“…Concurrently, fatigue failures of components have been evaluated to be the most important origin of immense financial losses [ 2 , 3 , 4 ]. Despite the huge importance of polymer engineering components, the volume of research for fatigue has concentrated mostly on metallic materials, while the fatigue characteristics of polymers are still under-researched, and much effort is required to enhance their fatigue resistance [ 5 , 6 ] and to develop accomplished simulation tools for failure assessment [ 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Short- to Long-Term Cyclic Deformation Behavior and Fatigue Life of Polymers

Barriere,

Carbillet,

Gabrion

et al. 2024

Polymers

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The prediction of mechanical behavior and fatigue life is of major importance for design and for replacing costly and time-consuming tests. The proposed approach for polymers is a combination of a fatigue model and a governing constitutive model, which is formulated using the Haward–Thackray viscoplastic model (1968) and is capable of capturing large deformations. The fatigue model integrates high- and low-cycle fatigue and is based on the concept of damage evolution and a moving endurance surface in the stress space, therefore memorizing the load history without requesting vague cycle-counting approaches. The proposed approach is applicable for materials in which the fatigue development is ductile, i.e., damage during the formation of microcracks controls most of the fatigue life (up to 90%). Moreover, damage evolution shows a certain asymptote at the ultimate of the low-cycle fatigue, a second asymptote at the ultimate of the high-cycle fatigue (which is near zero), and a curvature of how rapidly the transition between the asymptotes is reached. An interesting matter is that similar to metals, many polymers satisfy these constraints. Therefore, all the model parameters for fatigue can be given in terms of the Basquin and Coffin–Manson model parameters, i.e., satisfying well-defined parameters.

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Testing and analysis of solid polymers under large monotonic and long-term cyclic deformation

Cited by 20 publications

References 38 publications

Multiscale mechanics of polydimethylsiloxane: A comparison of meso‐ and micro‐cyclic deformation behavior

Multiscale mechanics of polydimethylsiloxane: A comparison of meso‐ and micro‐cyclic deformation behavior

The development of the formalism of movable cellular automata for modeling the nonlinear mechanical behavior of viscoelastic materials

Prediction of Short- to Long-Term Cyclic Deformation Behavior and Fatigue Life of Polymers

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