Constructing boundary double-grid finite elements to calculate three-dimensional composite beams having the difficulty of fastening is shown. Application of the proposed boundary elements in discrete double-grid models of three-dimensional beams leads to the error reduction of mesh solutions. Moreover, discrete models including boundary elements have small dimensions.
composites, beams, elasticity, double-grid finite elements, finite elements method, boundary elements
1. Zenkevich O. Metod konechnyh elementov v tehnike. - M.: Mir, 1975.
2. Gallager R. Metod konechnyh elementov. Osnovy. - M.: Mir, 1984.
3. Norri D., de Friz Zh. Vvedenie v metod konechnyh elementov. - M.: Mir, 1981.
4. Matveev A.D. Nekotorye podhody proektirovaniya uprugih mnogosetochnyh konechnyh elementov: dep. v VINITI. - M., 2000. - № 2990-V00. - 30 s.
5. Matveev A.D. Mnogosetochnoe modelirovanie kompozitov neregulyarnoy struktury s malym koefficientom napolneniya // PMTF. - 2004. - № 3. - S. 161-171.
6. Fudzii T., Dzako M. Mehanika razrusheniya kompozicionnyh materialov. - M.: Mir, 1982.
7. Samul' V.I. Osnovy teorii uprugosti i plastichnosti. - M.: Vyssh. shk., 1982. - 264 s.
