Prediction of composite properties from a representative volume element

Sun, C. T.; Vaidya, Rajesh S.

doi:10.1016/0266-3538(95)00141-7

Cited by 736 publications

(364 citation statements)

References 13 publications

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“…Thus, this approach simulates a strain (or displacement)-controlled test scenario. To efficiently handle post-processing of the simulated individual element stresses, a homogenization module is developed to obtain effective area-averaged REA stresses/strains (Sun & Vaidya, 1996) and the effective individual phase stresses/strains. Figure 1(b) shows the stress distribution obtained after analysis under the application of an imposed strain of 0.12% (which is well within the linear elastic range of cementitious systems).…”

Section: Materials Properties and Microstructural Modelsmentioning

confidence: 99%

Micromechanical Modeling for Material Design of Durable Infrastructural Materials: The Influence of Aggregate and Matrix Modification on Elastic Behavior of Mortars

Das

Maroli

Neithalath³

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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This paper reports the fundamental difference in microstress distributions in traditional hardened cement paste with quartz inclusions and a cement paste with lightweight aggregate (LWA) inclusions using microstructurebased numerical simulation involving finite element method with periodic boundary conditions. Variation of relative stress distributions under varying component material properties and varying microstructural features in both the systems is elucidated for a comprehensive understanding. The presented microstructure-based numerical technique accurately captures the stress concentrations inside microheterogeneous systems, which is otherwise not detectible using analytical homogenization schemes. Numerical simulations reveal that strengthening and stiffening of matrix and interfacial transition zone (ITZ) with silica fume incorporation as cement replacement in LWA incorporated cementitious systems has a detrimental effect in terms of overall strength of the material, contrary to traditional quartz-based cement mortar system. Proper selection of stiffness and strength of LWA inclusions is critical towards performance of such materials. This paper links the microstructure with mechanical behavior of two different microheterogeneous materials and provides valuable input towards material design of such non-traditional cementitious systems with different inclusions.

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Section: Materials Properties and Microstructural Modelsmentioning

confidence: 99%

Micromechanical Modeling for Material Design of Durable Infrastructural Materials: The Influence of Aggregate and Matrix Modification on Elastic Behavior of Mortars

Das

Maroli

Neithalath³

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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“…It brings up a question about how we can interpret results from molecular simulations in terms of continuum mechanics. One possible solution to this problem is homogenizing a group of atoms as a material point, similar to the micromechanics in composites materials [53]. Since this method has not been standardized, the stress value may depend on the choice of homogenization technique used.…”

Section: Calculation Of Local Stress In Molecular Modelsmentioning

confidence: 99%

Applicability of Continuum Fracture Mechanics in Atomistic Systems

Cheng

Sun

2011

Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation

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Stress intensity factor is one of the most significant fracture parameters in linear elastic fracture mechanics (LEFM). Due to its simplicity, many researchers directly employed this concept to explain their results from molecular simulation. However, stress intensity factor defines the amplitude of the singular stress, which is the product of continuum elasticity. Under atomistic systems without the stress singularity, the concept of stress intensity factor must be examined. In addition, the difficulty of studying the stress intensity factor in atomistic systems may be traced back to the ambiguous definition of the local atomistic stress. In this study, the definition of the local virial stress is adopted. Subsequently, through the consideration of K-dominance, the approximated stress intensity factor based on the atomistic stress can be projected within a reasonable region. Moreover, the influence of cutting interatomic bonds to create traction free crack surfaces and the critical stress intensity factor is also discussed.

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“…In addition, the transverse shear modulus G R tt is given by G R tt = E R t /2(1 + ν R tt ). The five independent elastic properties can be obtained from the finite element analysis of the RVE under longitudinal normal loading (mechanical mean stress σ * xx ), transverse normal loading (mechanical mean stress σ * yy ) and longitudinal shear loading (mechanical mean stress σ * zx ) [15].…”

Section: Finite Element Analysis Of the Composite Rvementioning

confidence: 99%

Bending Response of Carbon Nanotube-Based Polymer Composites at Cryogenic Temperatures

Kuronuma¹,

Shindo²,

Mito³

et al. 2010

AIP Conference Proceedings

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This work examines the cryogenic bending response of carbon nanotube (CNT)-based polymer composites through experiments and multiscale simulations. Flexural tests on CNT/polycarbonate composites were performed at cryogenic temperatures. Multiscale analysis was also performed to predict the composite behavior at cryogenic temperatures. The variations of the mechanical response with the interfacial damage state were discussed, and the simulation results were utilized to understand the experimental observations.

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Prediction of composite properties from a representative volume element

Cited by 736 publications

References 13 publications

Micromechanical Modeling for Material Design of Durable Infrastructural Materials: The Influence of Aggregate and Matrix Modification on Elastic Behavior of Mortars

Micromechanical Modeling for Material Design of Durable Infrastructural Materials: The Influence of Aggregate and Matrix Modification on Elastic Behavior of Mortars

Applicability of Continuum Fracture Mechanics in Atomistic Systems

Bending Response of Carbon Nanotube-Based Polymer Composites at Cryogenic Temperatures

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