Development of special multi-material elements

Authors
Citation
Ak. Soh, Development of special multi-material elements, INT J SOL S, 37(6), 2000, pp. 899-918
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
ISSN journal
0020-7683 → ACNP
Volume
37
Issue
6
Year of publication
2000
Pages
899 - 918
Database
ISI
SICI code
0020-7683(200002)37:6<899:DOSME>2.0.ZU;2-P
Abstract
A procedure for developing multi-material elements, which are able to elimi nate the weakness of the conventional finite elements in determining the st ress distributions along the interfaces of different materials, has been pr oposed. The results obtained by this multi-material element type are in goo d agreement with those obtained by a modified finite element approach, whic h employs the least square fitting method to improve the calculation of int erfacial stresses. Moreover, these two solutions are superior to the conven tional finite element solution. The improvements made by these two modified solutions are entirely due to the imposition of the necessary and sufficie nt equilibrium and compatibility conditions at the interfaces. It is worth noting that while the two modified finite element approaches provide compar able accuracy, the proposed approach using new multi-material elements is m uch easier to implement. (C) 1999 Elsevier Science Ltd. All rights reserved .