A multi-scale framework for layered composites with thermo-rheologically complex behaviors

Muliana, Anastasia; Haj-Ali, Rami

doi:10.1016/j.ijsolstr.2008.01.015

Cited by 33 publications

(16 citation statements)

References 47 publications

(52 reference statements)

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“…(7). This approach has been used by Muliana and Haj-Ali (2008) to model the creep response of polymers at different temperatures.…”

Section: Identification Of Temperature Coupling Parametersmentioning

confidence: 99%

“…In fact, Schapery's single integral model is widely being used to model the behavior of viscoelastic materials such as polymers (e.g. Christensen, 1968;Schapery, 1969Schapery, , 1974Schapery, , 2000Sadkin and Aboudi, 1989;Haj-Ali and Muliana, 2004;Muliana and Haj-Ali, 2008). Furthermore, Touati and Cederbaum (1998), Haj-Ali and Muliana (2004), Sadd et al (2004) and Huang et al (2007) have developed numerical schemes for implementation of Schapery's constitutive model in finite element (FE) codes.…”

Section: Introductionmentioning

confidence: 99%

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A thermo-viscoelastic–viscoplastic–viscodamage constitutive model for asphaltic materials

Darabi

Al‐Rub

Masad

et al. 2011

International Journal of Solids and Structures

188

109

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a b s t r a c tA temperature-dependent viscodamage model is proposed and coupled to the temperature-dependent Schapery's nonlinear viscoelasticity and the temperature-dependent Perzyna's viscoplasticity constitutive model presented in Abu Al-Rub et al. (2009) and Huang et al. (in press) in order to model the nonlinear constitutive behavior of asphalt mixes. The thermo-viscodamage model is formulated to be a function of temperature, total effective strain, and the damage driving force which is expressed in terms of the stress invariants of the effective stress in the undamaged configuration. This expression for the damage force allows for the distinction between the influence of compression and extension loading conditions on damage nucleation and growth. A systematic procedure for obtaining the thermo-viscodamage model parameters using creep test data at different stress levels and different temperatures is presented. The recursive-iterative and radial return algorithms are used for the numerical implementation of the nonlinear viscoelasticity and viscoplasticity models, respectively, whereas the viscodamage model is implemented using the effective (undamaged) configuration concept. Numerical algorithms are implemented in the well-known finite element code Abaqus via the user material subroutine UMAT. The model is then calibrated and verified by comparing the model predictions with experimental data that include creep-recovery, creep, and uniaxial constant strain rate tests over a range of temperatures, stress levels, and strain rates. It is shown that the presented constitutive model is capable of predicting the nonlinear behavior of asphaltic mixes under different loading conditions.

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“…(7). This approach has been used by Muliana and Haj-Ali (2008) to model the creep response of polymers at different temperatures.…”

Section: Identification Of Temperature Coupling Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A thermo-viscoelastic–viscoplastic–viscodamage constitutive model for asphaltic materials

Darabi

Al‐Rub

Masad

et al. 2011

International Journal of Solids and Structures

188

109

View full text Add to dashboard Cite

show abstract

“…The NVE response of polymers and PCMs can be wellpredicted by applying this model (see e.g. Christensen (1966); Schapery (1969aSchapery ( , 1974Schapery ( , 2000; Sadkin and Aboudi (1989); Haj-Ali and Muliana (2004); Muliana and Haj-Ali (2008)). Nevertheless, the Schapery model was written based on the small strain notion and since the deformation in polymer and polymer composite materials in many cases…”

Section: Investigating Viscous Based Constitutive Models For Evaluatimentioning

confidence: 99%

Microstructure-Based Computational Modeling of Mechanical Behavior of Polymer Micro/Nano Composites

Tehrani¹

2013

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Lightweight advanced materials are critical in the manufacturing of many Army vehicles. Recently, numerical tools have been utilized to customize experiments to achieve optimized behavior of micro/nano polymer composites (MNPCs). Most numerical studies are based on characterizing the MNPCs through simple microstructures, as circular particles or straight fibers embedded in a specific polymer matrix. Although these geometries are effective in virtually modeling some types of composite material behavior, they fail to address some critical key Names of Under Graduate students supportedPERCENT_SUPPORTED NAME FTE Equivalent:Total Number:The number of undergraduates funded by this agreement who graduated during this period with a degree in science, mathematics, engineering, or technology fields:The number of undergraduates funded by your agreement who graduated during this period and will continue to pursue a graduate or Ph.D. degree in science, mathematics, engineering, or technology fields:Number of graduating undergraduates who achieved a 3.5 GPA to 4.0 (4.0 max scale): Number of graduating undergraduates funded by a DoD funded Center of Excellence grant for Education, Research and Engineering:The number of undergraduates funded by your agreement who graduated during this period and intend to work for the Department of DefenseThe number of undergraduates funded by your agreement who graduated during this period and will receive scholarships or fellowships for further studies in science, mathematics, engineering or technology fields: Student Metrics This section only applies to graduating undergraduates supported by this agreement in this reporting periodThe number of undergraduates funded by this agreement who graduated during this period: 0.00 ...... Names of Personnel receiving masters degrees Inventions (DD882) Scientific ProgressBecause the mechanical responses of polymers and many types of polymer composites are in the large deformation range, the Eulerian or Lagrangian concept is required for measuring the stress and strain. On the other hand, developing a large deformation based constitutive model requires a number of considerations, and should be performed from a thermodynamics point of view to study the motion of each component of the material. Even though such approach is precise and physically sound, it is limited to just one type of material. Furthermore, polymers show high dependency to the rate and time of the applied load; hence, employing viscoelastic, viscoplastic and viscodamage models is necessary. To address these issues, a consistent framework is developed to generalize elastic/viscoelastic and plastic/viscoplastic models from small strain to the large deformation range. The developed continuum based app...

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“…A micromechanics based 3D framework was proposed for the nonlinear analysis of pultruded fiber-reinforced polymeric composites using a nested multi-scale approach and homogenization technique [14]. A multi-scale modeling framework is recently proposed for generating the effective nonlinear thermo-viscoelastic responses of multi-layered and thick-section composites by Muliana and Haj-Ali [15]. Several experimental investigations on pultrusion were performed by Batch and Macosko [16] and Britnell et al [17].…”

Section: Introductionmentioning

confidence: 99%

Time-Variant Simulation of Multi-Material Thermal Pultrusion

Joshi

Chen

2010

Appl Compos Mater

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Pultrusion being the viable and economical process for producing constant crosssection composite products, many variants of it are being tried out. This paper embarks on the pultrusion with multi-materials; typically of polymer foam/glass fibre reinforced polymer (GFRP) sandwich panels. Unlike conventional composites pultrusion, this process with more than two material phases, one of them dry, poses a challenge in simulating the thermal cocuring within the die. In this paper, the formulation and development of three-dimensional, finite element/nodal control volume (FE/NCV) approach for such multi-material pultrusion is presented. The numerical features for handling the dry-wet material interfaces, material shrinkage, variations in pull speed and die heating, and foam-to-skin thickness ratio are discussed. Implementation of the FE/NCV procedure and its application in analyzing pultrusion of polymer foam/GFRP sandwich panels with multi-heater environment are presented.

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A multi-scale framework for layered composites with thermo-rheologically complex behaviors

Cited by 33 publications

References 47 publications

A thermo-viscoelastic–viscoplastic–viscodamage constitutive model for asphaltic materials

A thermo-viscoelastic–viscoplastic–viscodamage constitutive model for asphaltic materials

Microstructure-Based Computational Modeling of Mechanical Behavior of Polymer Micro/Nano Composites

Time-Variant Simulation of Multi-Material Thermal Pultrusion

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