Compressive properties analysis and optimization design of vat photopolymerization printed lattice structures formed by polyurethane composites

摘要

Based on the Body Centered Tetragonal lattice structure of vat photopolymerization printed polyurethane composites, analytical relations between cell parameters and its compressive elastic modulus are deduced. Furthermore, unified numerical expressions are proposed for the unit cell, single-layer cell, and multilayered cell. Different structures are utilized for simulating calculation and the results show that the analytical solution and simulation outcome are consistent with the experimental tests. A modified genetic algorithm is proposed to optimize the lattice structure and its relative density is greatly reduced under certain stiffness conditions. It is promising to accelerate the development and production of integrated lattice products.

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