Architectured materials are an emerging and intriguing class of materials with the promise of exceptional performance and multifunctional properties. They include but are not limited to lattice materials, metamaterials, structured composites, dense material system, etc. The key characteristic distinguishing architectured materials from other materials is their very high morphological control, which allows one to tailor and control specific mechanisms of stress transfer, wave propagation, elastic/plastic buckling, crack propagation, thermal expansion, and among others. Well-designed architectured materials can generate new and attractive combinations of properties that expand the material space and enable novel applications in engineering and biomedical fields. Our current research interest in architectured materials includes but is not limited to
- Mechanical metamaterials with enhanced performance on impact and blast resistance.
- Symmetry guided design of architectured materials with desired static/dynamic properties.
- Pu Zhang*. "Symmetry and degeneracy of phonon modes for periodic structures with glide symmetry". Journal of the Mechanics and Physics of Solids 2019, 122: 244-261
- Pu Zhang, MA Heyne, AC To*. “Biomimetic staggered composites with highly enhanced energy dissipation: modeling, 3D printing, and testing”. Journal of the Mechanics and Physics of Solids 2015, 83: 285-300
- Pu Zhang, AC To*. “Point group symmetry and deformation induced symmetry breaking of superlattice materials”. Proceedings of the Royal Society A 2015, 471, 20150125
- Pu Zhang, AC To*. “Broadband wave filtering of bioinspired hierarchical phononic crystal”. Applied Physics Letters 2013, 102: 121910
3D printing (also called additive manufacturing) is any of manufacturing processes in which material is joined or solidified under computer control to create a three-dimensional object, with material being added together (such as liquid molecules or powder grains being fused together). Objects can be of almost any shape or geometry and typically are produced using digital model data from a 3D model. The 3D printing technology has advantages over conventional manufacturing by producing components with complicated geometry, customized design, unprecedented feature, and tremendously reduced cost. Currently, researchers also endeavor to develop novel 4D printing techniques by transforming the 3D printed materials in the time dimension so the manufactured component is active, programmable, and functional. We are actively working in the joint area of applied mechanics and 3D/4D printing with projects in the following topics.
- Mechanical property characterization and modeling of thin walled metallic structures fabricated from DLMS
- Design, optimization, and fabrication of 3D printed polymeric composites
- Pu Zhang, J Liu, AC To*. “Role of anisotropic properties on the topology optimization of 3D printed load-bearing structures”. Scripta Materialia 2017, 135: 148-152 (invited paper)
- Pu Zhang, AC To*. “Transversely isotropic hyperelastic-viscoplastic model for glassy polymers with application to additive manufactured photopolymers”. International Journal of Plasticity 2016, 80: 56-74
- Pu Zhang, et al. “Efficient design-optimization of variable-density hexagonal cellular structure by additive manufacturing: Theory and validation”. Journal of Manufacturing Science and Engineering 2015, 137: 021004