Multiscale modeling of progressive failure in polymer nanocomposites using nanoscale informed damage mechanics
| Autor: | Samit Roy, Ankit Srivastav |
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| Rok vydání: | 2016 |
| Předmět: |
State variable
Materials science Polymer nanocomposite Mechanical Engineering General Mathematics Constitutive equation Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Multiscale modeling Finite element method 0104 chemical sciences Nonlinear system Molecular dynamics Mechanics of Materials Damage mechanics General Materials Science Statistical physics 0210 nano-technology Civil and Structural Engineering |
| Zdroj: | Mechanics of Advanced Materials and Structures. 24:45-63 |
| ISSN: | 1537-6532 1537-6494 |
| DOI: | 10.1080/15376494.2015.1101513 |
| Popis: | In this article, a novel technique to model damage and damage evolution in polymer nanocomposites (PNCs) using the internal state variable approach is proposed. The multiscale aspects of the nanocomposite are captured by embedding local inhomogeneities and the localized nanoparticle (nanographene) and polymer atom interactions at the interface into a continuum scale damage model. This approach assumes that the damage evolution is primarily due to changes in nonbonded interactions at the nanoscale, hence the moniker nanoscale-informed damage mechanics (NIDM) model. The unknown coefficients in the NIDM model are obtained by a linear regression fit of the polymer and the PNC stress-strain behavior using molecular dynamics simulation. It is envisioned that the resulting nonlinear constitutive model can be readily incorporated into a hierarchical multiscale finite element model and used by the aerospace industry for structural scale applications to model progressive failure. |
| Databáze: | OpenAIRE |
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