Multi-mechanism damage-plasticity model for semi-crystalline polymer: Creep damage of notched specimen of PA6

Saï, Kacem; Laiarinandrasana, Lucien; Naceur, Ilyes Ben; Besson, Jacques; Jeridi, M.; Cailletaud, Georges

doi:10.1016/j.msea.2010.09.071

Cited by 18 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The damage interaction was modelled by a weighted additive impact of different accumulated plastic strains which contradicts other models in the literature where the interaction was modelled by an additive impact of damage variables (Mazars et al, 1990;Chaboche, 1992;Halm and Dragon, 1996;Welemane and Cormery, 2003;Challamel et al, 2005;Cormery and Welemane, 2010;Goidescu et al, 2013;Saï and Cailletaud, 2007;Saï et al, 2011;Saï, 2011). This strong coupling of plasticity and damage may be in contrast to earlier CDM models (Horii and Nemat-Nasser, 1983;Bažant andOh, 1983, 1985;Lemaitre, 1984;Bažant and Prat, 1988a,b;Chaboche, 1992;Lemaitre and Chaboche, 2000;Lemaitre and Desmorat, 2005;Chaboche, 2008).…”

Section: Discussionmentioning

confidence: 91%

“…Capturing the "unilateral effect" present for instance in concrete (Mazars et al, 1990;Halm and Dragon, 1996;Welemane and Cormery, 2003;Challamel et al, 2005;Cormery and Welemane, 2010;Goidescu et al, 2013) where damage under tension evolves differently than damage under compression or more generally loading mode dependent damage mechanisms remains an open question. For initially anisotropic materials such as bone, the asymmetric behaviour is for instance modelled using spectral decomposition (Schreyer, 1995;Biegler and Mehrabadi, 1995) or by multi-mechanism approaches (Saï and Cailletaud, 2007;Saï et al, 2011;Saï, 2011). Crack closure in orthotropic materials was modelled recently in 2D (Goidescu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Continuum damage interactions between tension and compression in osteonal bone

Mirzaali,

Bürki,

Schwiedrzik

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Continuum damage interactions between tension and compression in osteonal bone

Mirzaali,

Bürki,

Schwiedrzik

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

“…However, to model more complex behavior they may be functions, e.g. phase fractions of composites, see and the references therein. In the case of non‐constant

a_{j}

, so that

\partial_{t} a_{j} \neq 0

, an additional term arises in the remaining inequality due to

\begin{matrix} true \\ right σ : \partial_{t} ε = \sum_{j = 1}^{N} {bold-italicσ}_{j} : \partial_{t} {bold-italic ε}_{j} + \sum_{j = 1}^{N} \partial_{t} a_{j} σ : {bold-italic ε}_{j} . \end{matrix}

Including the second sum into considerations, evolution equations for the

a_{j}

must be given, and thermodynamical consistency requires much more effort to prove.…”

Section: Modelingmentioning

confidence: 99%

“…However, to model more complex behavior they may be functions, e.g. phase fractions of composites, see [25][26][27] and the references therein. In the case of non-constant a j , so that ∂ t a j = 0, an additional term arises in the remaining inequality due to…”

Section: Remark 21mentioning

confidence: 99%

On mathematical problems for viscoelastic multi‐mechanism models in the isothermal case

2015

View full text Add to dashboard Cite

We deal with special kinds of viscoelastic multi‐mechanism models (MM models) in series connection. The MM models under consideration consist of a finite number of rheological Kelvin‐Voigt elements and, possibly, a thermoelastic element. An important new item is the possible coupling between the KV elements leading to a new quality. After dealing in short with the modeling, we investigate two resulting three‐dimensional mathematical problems in the isothermal case. In particular, we show existence and uniqueness of weak solutions for the corresponding initial‐boundary value problems for displacements, stresses and partial strains.

show abstract

“…Adhesion problems aside, though some authors consider that a bulk characterization of the adhesive polymer might be enough (Lilleheden, 1994), this suggestion is far from universally accepted; mainly 80 due to the hydrostatic pressure effects undergone by the polymer in a confined state between substrates. It is of course possible to take into account the stress triaxiality or the pressure sensitivity effects in a bulk 2 state by using specific notched cylindrical bar specimens (Saï et al, 2011), however, this is made very difficult in the case of an anisotropic behavior which may occur with filled adhe-85 sives (Joannès et al, 2010). Then it is often necessary to employ in situ characterization devices.…”

mentioning

confidence: 99%

A micromechanical damage characterization and the modeling of a mineral filled epoxy adhesive

Joannès¹

2014

Mechanics of Materials

View full text Add to dashboard Cite

International audienceCurrent structural adhesives can be used to assemble a variety of similar and dissimilar materials, usually with minimal surface preparation and sometimes even without degreasing. This kind of performance is obtained by using filled structural polymers which, as a consequence, lead to complex multi-phased composite material microstructures. Nevertheless, the use of mineral fillers such as talc also affects the adhesive mechanical behavior which is of major importance for structural applications. In order to study this type of material, a multi-axial mechanical characterization of an epoxy structural adhesive has been undertaken using a modified Arcan setup. An unfilled and not marketed formulation of the epoxy adhesive has also been tested to emphasize the role of the mineral particles on its mechanical behavior. As a first step, this paper reports the mechanical differences that have been observed between the filled and the unfilled versions of the adhesive, and proposes possible explanations related to microstructural processes. Contribution of the mineral fillers leads to a deterministic failure process. This is suggested, most significantly, by microstructural observations which have revealed useful information concerning the damage evolution and its kinetics. Indeed, the applied mechanical load provokes an exfoliation of talc flakes leading to a pattern of micro-cracks. In a subsequent step in the study, based on both macro and micro experimental results of the adhesive, a damage model has been derived from the vectorial description of cracking modes and its performance has been assessed

show abstract

Multi-mechanism damage-plasticity model for semi-crystalline polymer: Creep damage of notched specimen of PA6

Cited by 18 publications

References 21 publications

Continuum damage interactions between tension and compression in osteonal bone

Continuum damage interactions between tension and compression in osteonal bone

On mathematical problems for viscoelastic multi‐mechanism models in the isothermal case

A micromechanical damage characterization and the modeling of a mineral filled epoxy adhesive

Contact Info

Product

Resources

About