Development of viscoelastic/rate-sensitive-plastic constitutive law for fiber-reinforced composites and its applications. Part I: Theory and material characterization

Chung, Kwansoo; Ryou, Hansun

doi:10.1016/j.compscitech.2007.06.003

Cited by 34 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model involves nine adjustable parameters: E; a; b; U; c; j; R; A 0 ; A 1 . This number appears to be modest compared with numbers of parameters in other stress-strain relations: 12 [29], 13 [28], 14 [30], 15 [31], 17 [32], over 20 [33,34], whereas models with a comparable number of constants (e.g., [22] with 6 parameters) fail to describe observations in relaxation tests and ternary creep.…”

Section: Constitutive Modelmentioning

confidence: 96%

Viscoelasticity, viscoplasticity, and creep failure of polypropylene/clay nanocomposites

Drozdov

Lejre

Christiansen

2009

Composites Science and Technology

View full text Add to dashboard Cite

Section: Constitutive Modelmentioning

confidence: 96%

Viscoelasticity, viscoplasticity, and creep failure of polypropylene/clay nanocomposites

Drozdov

Lejre

Christiansen

2009

Composites Science and Technology

View full text Add to dashboard Cite

“…Various experiments have been carried out to reveal the nonlinear deformation mechanism, such as plasticity and micro‐cracks in polymer matrix, fiber‐matrix interface debonding, and fiber reorientation. Meanwhile, constitutive models have been developed in different frameworks, such as elasticity, plasticity, viscosity, damage, fracture, or their multi‐interactions. Those models were demonstrated to give accurate predictions of the nonlinear response under monotonic loadings but their applicability to the cyclic loading and unloading conditions were not discussed.…”

Section: Introductionmentioning

confidence: 99%

“…They successfully characterized the nonlinear unloading features but the determination of model parameters was quite complex. The third group belonged to the interactive models among elasticity, plasticity, and viscosity accounting for the time dependence of polymer matrix. Those models usually extended the quasi‐static formulations from the first and second groups to the viscosity range, and were not discussed since this article considered a quasi‐static cyclic compression.…”

Section: Introductionmentioning

confidence: 99%

Cyclic compressive deformation behavior of polymer matrix composites: Experiments and constitutive modeling

2020

View full text Add to dashboard Cite

This article presents integrated experiments and constitutive modeling of cyclic compressive deformation and Poisson behavior of unidirectional (UD) fiber‐reinforced polymer matrix composites (PMCs). Consecutive loading‐unloading tests with a gradually increasing peak stress are performed for five cycles and on UD laminates with different fiber orientations. Nonlinear accumulation of plastic strain with the peak stress is observed both in the axial and lateral directions for all fiber orientations and described by a nonassociative plasticity model. This model enables the collapsing of axial and lateral stress‐plastic strain curves from different fiber orientations into a single master curve in the effective stress‐effective plastic strain plane and allows accurate predictions of compressive plastic Poisson's ratio. Nonlinear unloading behavior appears in the cycles and is attributed to the recovery of nonlinear elastic strain. A linear relationship between plastic strain and nonlinear elastic strain is assumed regardless of the axial and lateral directions. By incorporating this linear dependence into the nonassociative plasticity model, the cyclic evolution of nonlinear elastic strain is simulated. Experimental results of UD laminates with different fiber orientations are used to validate the accuracy of the model in the cyclic compressive nonlinear response and Poisson effect of PMCs.

show abstract

“…In general, constitutive models for the nonlinear hysteresis behavior of polymer composites during loading and unloading may be divided into two groups. Models in the first group 18–21 are based on viscoelasticity or viscoplasticity in view of the rate sensitivity of polymer matrix. Mizobe and co-workers 18,19 decomposed the total strain into elastic part and viscous part.…”

Section: Introductionmentioning

confidence: 99%

“…23 The Armstrong–Frederick rule was then modified by a transient recovery term to simulate the hysteresis loops during loading and unloading. Chung and Ryou 20 decoupled the total strain into viscoelastic part and plastic part. The viscoelastic behavior of polymer composites was assumed to follow the five-element Maxwell model and non-constant material parameters were provided for the nonlinear unloading and reloading responses.…”

Section: Introductionmentioning

confidence: 99%

Observation and modeling of loading–unloading hysteresis behavior of unidirectional composites in compression

Wang

Xiao

Kawai

et al. 2017

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

The loading–unloading hysteresis behavior of unidirectional HTS40/PA6 carbon/polyamide laminates under off-axis compression has been examined both experimentally and constitutively in the present study. Monotonic compressive tests are first performed on unidirectional laminates to identify the basic properties of off-axis deformation. Then, five cycles of compressive loading and unloading tests are carried out with a gradually increasing peak stress for each specimen, followed by testing to failure. Significant nonlinear unloading behavior is observed after the material has been loaded into the nonlinear deformation region, and apparent plastic strain is seen after full unloading. The reloading curve also exhibits nonlinearity and conduces to a slightly open hysteresis loop with unloading. An approach is developed to predict the nonlinear hysteresis behavior of unidirectional composites by assuming an anelastic strain component in the nonlinear compressive deformation. The assumption of anelastic strain is a modification of Sun–Chen’s one-parameter plasticity model that considers the nonlinear deformation completely as plastic strain from monotonic tests. The modified model has been validated by the off-axis loading–unloading test results on unidirectional laminates. Results verify that the model accurately captures not only the plastic strain but also the complex nonlinear hysteresis behavior in the observed off-axis loading–unloading stress–strain curves.

show abstract

Development of viscoelastic/rate-sensitive-plastic constitutive law for fiber-reinforced composites and its applications. Part I: Theory and material characterization

Cited by 34 publications

References 21 publications

Viscoelasticity, viscoplasticity, and creep failure of polypropylene/clay nanocomposites

Viscoelasticity, viscoplasticity, and creep failure of polypropylene/clay nanocomposites

Cyclic compressive deformation behavior of polymer matrix composites: Experiments and constitutive modeling

Observation and modeling of loading–unloading hysteresis behavior of unidirectional composites in compression

Contact Info

Product

Resources

About