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High strain rate deformation modeling of a polymer matrix composite. part 1; matrix constitutive equations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stouffer, Donald C. Goldberg, Robert K. |
| Copyright Year | 1998 |
| Description | Recently applications have exposed polymer matrix composite materials to very high strain rate loading conditions, requiring an ability to understand and predict the material behavior under these extreme conditions. In this first paper of a two part report, background information is presented, along with the constitutive equations which will be used to model the rate dependent nonlinear deformation response of the polymer matrix. Strain rate dependent inelastic constitutive models which were originally developed to model the viscoplastic deformation of metals have been adapted to model the nonlinear viscoelastic deformation of polymers. The modified equations were correlated by analyzing the tensile/ compressive response of both 977-2 toughened epoxy matrix and PEEK thermoplastic matrix over a variety of strain rates. For the cases examined, the modified constitutive equations appear to do an adequate job of modeling the polymer deformation response. A second follow-up paper will describe the implementation of the polymer deformation model into a composite micromechanical model, to allow for the modeling of the nonlinear, rate dependent deformation response of polymer matrix composites. |
| File Size | 1998906 |
| Page Count | 38 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980227139 |
| Archival Resource Key | ark:/13960/t4jm76h5b |
| Language | English |
| Publisher Date | 1998-08-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Micromechanics Polymer Matrix Composites Compressibility Deformation Viscoplasticity Nonlinearity Mathematical Models Thermoplasticity Constitutive Equations Peek Strain Rate Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
