Abstract
Composite sandwich plates and shells are gaining increasing popularity in engineering practice, due to their high stiffness-to-weight ratio, low thermal conductivity and energy absorption characteristics. Modeling of the structural response of a sandwich member requires knowledge of the mechanical behavior of the materials used for the facings and the core. The paper presents a new constitutive model for closed-cell cellular materials, developed with the microplane approach. The model is then employed in a finite element analysis of three point bending tests of sandwich beams failing by core indentation. Good agreement of the numerical results with the experimental observations is achieved. This proves the new model to be capable of satisfactorily reproducing the mechanical response of cellular materials.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 8111-8132 |
| Number of pages | 22 |
| Journal | International Journal of Solids and Structures |
| Volume | 38 |
| Issue number | 44-45 |
| DOIs | |
| State | Published - Oct 12 2001 |
Funding
It is gratefully acknowledged that the research was supported under grant ONR-N00014-91-J-1109 from Office of Naval Research (Dr. Yapa D.S. Rajapakse, program director) to Northwestern University (Z.P. Bažant, grant director and principal investigator).
Keywords
- Cellular materials
- Composites
- Finite-element analysis
- Foams
- Sandwich plates
ASJC Scopus subject areas
- Modeling and Simulation
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Applied Mathematics