Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number ADA563992
Title Efficient High-Fidelity, Geometrically Exact, Multiphysics Structural Models.
Publication Date Oct 2011
Media Count 181p
Personal Author W. Yu
Abstract Under the sponsorship of AFOSR, USU carried out a challenging research project to develop efficient high-fidelity, geometrically exact, multi physics structural models for synergetic exploitations of static or dynamic large nonlinear structural deformations under coupled thermal, electromagnetic, and mechanical loads. The approach uses the concept of decomposition of the rotation tensor to systematically capture all geometrical nonlinearities, and uses the variational asymptotic method to achieve an excellent tradeoff between accuracy and efficiency. In the first year, we have carried out a critical assessment of the proposed approach and developed models for functionally graded plates. In the second year, we developed models for functionally graded smart plates responsive to electromagnetical fields in addition to mechanical fields. We also developed a new classical plate model for heterogeneous plates through simultaneous homogenization and dimensional reduction. In the third year, we initiated the development for a geometrically exact plate analysis, a refined plate model for heterogeneous plates, and used the finite element method to solve the multi physics plate model and confirmed our analytical solutions.
Keywords Aerospace craft
Composite structures
Efficient high-fidelity modeling
Finite element analysis
Mathematical models
Multiphysics structural models
Nonlinear systems
Structural analysis
Structural mechanics
Variational asymptotic method

Source Agency Non Paid ADAS
NTIS Subject Category 51C - Aircraft
46E - Structural Mechanics
Corporate Author Utah State Univ., Logan. Dept. of Mechanical and Aerospace Engineering.
Document Type Technical report
Title Note Final rept. 1 Aug 2008-30 Jun 2011.
NTIS Issue Number 1302
Contract Number FA9550-08-1-0405

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader