A New Macro-Micro Approach for Modeling Adaptive Composites
Abstract
The objective of this research was to develop a comprehensive model for accurately and efficiently modeling smart composite structures including the effects of composite damage. First, a new, efficient method for modeling smart structures with piezoelectric devices was developed. The coupled model simultaneously solves for the mechanical and electrical response of the system using mechanical displacements and electrical displacements. The developed theory utilizes a refined higher order displacement field that accurately captures the transverse shear deformation in moderately thick laminates. The model was then extended to include internal damage in the form of delamination and matrix cracking. When delamination is present, the sublaminates are modeled as individual plates and continuity is enforced at the interfaces. Matrix cracking was modeled as a reduction in laminate stiffness using parameters determined using finite element analysis of a representative crack. Finally, the simultaneous optimization of both mechanical and electrical parameters in an adaptive structural system was studied. This study demonstrated how multidisciplinary optimization techniques, such as the Kreisselmeier-Steinhauser function, can be utilized to optimize both structural and electrical aspects of an adaptive structural system. Results have shown that the developed model is capable of accurately modeling both the mechanical and electrical response of adaptive structures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 24, 2002
- Accession Number
- ADA404883
Entities
People
- Aditi Chattopadhyay
- Robert P. Thornburgh
Organizations
- Arizona State University