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are rica his pie of the material density. Examples of two-dimensional piezocomposite energy harvesting devices are pre-ctric e merou f reduc batteri years [2–4]. Piezoelectric material can be combined with other non-piezoelectric materials, generating new types of materials, called piezocomposites. These materials usually offer substantial advantages over conventional piezoelectric materials, such as high electromechanical coupling and better energy conversion [5]. Piezocomposite energy harvesting devices can be designed for quasi-static applications, where the excitation frequency is much structure is subjected to the same excitations. Topology optimization is a computational technique used for determining the layout, or topology, of a structure or material such that a prescribed objective is maximized or minimized, sub-jected to design constraints. It has been successfully applied to design piezoelectric devices in recent years. Silva et al. [5,8,9] used topology optimization and homogenization for designing piezo-electric microstructures with high performance characteristics, such as hydrostatic coupling coefficient, figure of merit, and electromechanical coupling factor. Sigmund et al. [10] employed topology optimization to design 1–3 piezocomposites with ⇑ Corresponding author