TY - GEN
T1 - Design of functionally graded piezocomposite materials using topology optimization
AU - Vatanabe, Sandro L.
AU - Paulino, Glaucio H.
AU - Silva, Emílio C.N.
N1 - Funding Information:
The first author thanks FAPESP (São Paulo State Foundation Research Agency, Brazil) by supporting him in his graduate studies through the fellowship No. 2008/57086-6. The third author thanks CNPq (National Council for Research and Development, Brazil), project number 303689/2009-9. The authors also thank Prof. Svanberg for providing the source code for the Method of Moving Asymptotes (MMA).
PY - 2010
Y1 - 2010
N2 - Piezocomposite materials provides effective properties (elastic, piezoelectric, and di- electric) that produce a better performance than pure piezoelectric materials. In the optimization of a piezocomposite the objective is to obtain an improvement in its perfor- mance characteristics, usually by changing the volume fractions of constituent materials, its properties, shape of inclusions, and the mechanical properties of the polymer matrix in the composite unit cell. An interesting application for piezoelectric materials are energy harvesting devices which stores energy from the environment. This work presents designs of functionally graded piezocomposite materials using topology optimization and homoge- nization method in order to maximize the electromechanical coupling coefficient k and the mechanical-to-electrical energy conversion, aiming at energy harvesting applications. The Functionally Graded Material (FGM) concept is applied to reduce the stress concentration between the constitutive materials and to investigate the influence of material gradation. The homogenization method is implemented using the graded finite element concept which takes into account the continuous gradation inside the finite elements. The material model used is based on the SIMP (Solid Isotropic Material With Penalization) and the optimiza- tion problem is solved by using the MMA (Method of Moving Asymptotes) algorithm.
AB - Piezocomposite materials provides effective properties (elastic, piezoelectric, and di- electric) that produce a better performance than pure piezoelectric materials. In the optimization of a piezocomposite the objective is to obtain an improvement in its perfor- mance characteristics, usually by changing the volume fractions of constituent materials, its properties, shape of inclusions, and the mechanical properties of the polymer matrix in the composite unit cell. An interesting application for piezoelectric materials are energy harvesting devices which stores energy from the environment. This work presents designs of functionally graded piezocomposite materials using topology optimization and homoge- nization method in order to maximize the electromechanical coupling coefficient k and the mechanical-to-electrical energy conversion, aiming at energy harvesting applications. The Functionally Graded Material (FGM) concept is applied to reduce the stress concentration between the constitutive materials and to investigate the influence of material gradation. The homogenization method is implemented using the graded finite element concept which takes into account the continuous gradation inside the finite elements. The material model used is based on the SIMP (Solid Isotropic Material With Penalization) and the optimiza- tion problem is solved by using the MMA (Method of Moving Asymptotes) algorithm.
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U2 - 10.2514/6.2010-9274
DO - 10.2514/6.2010-9274
M3 - Conference contribution
AN - SCOPUS:85069348993
SN - 9781600869549
T3 - 13th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference 2010
BT - 13th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference 2010
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 13th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, MAO 2010
Y2 - 13 September 2010 through 15 September 2010
ER -