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This paper designed and manufactured photosensitive resin-based 2-D lattice structures with different types of variable cross-section cores by stereolithography 3D printing technology (SLA 3DP). An analytical model was employed to predict the structural compressive response and failure types. A theoretical calculation was performed to obtain the most efficient material utilization of the 2-D lattice core. A flatwise compressive experiment was performed to verify the theoretical conclusions. A comparison of theoretical and experimental results showed good agreement for structural compressive response. Results from the analytical model and experiments showed that when the 2-D lattice core was designed so that R/r = 1.167 (R and r represent the core radius at the ends and in the middle), the material utilization of the 2-D lattice core improved by 13.227%, 19.068%, and 22.143% when n = 1, n = 2, and n = 3 (n represents the highest power of the core cross-section function).

Functional wood composites have been used in the field of optical lighting to alleviate power consumption. In this study, transparent fiber wood (TFW) composite and long afterglow transparent fiber wood (LATFW) composite were prepared by using wood powders with different mesh numbers as raw materials, and then blending with epoxy resin and long afterglow materials (SrAl2O4: Eu2+, Dy3+). By analyzing the material's fluorescence intensity, transmittance, stretch, and other performance, it is revealed that the performance of the materials varies from the number of wood powders mesh number. The comprehensive analysis showed that the TFW prepared by 100–120 mesh wood powders had excellent performance, with transmittance up to 62%, tensile strength 32.06 MPa, and tensile modulus 963.25 MPa. The TFW with wood powders of different mesh number results in materials with different transmittance, thus providing a straightforward way to produce materials with specific light transmittance properties. In addition, LATFW with afterglow time up to 1.5h(3h after irradiation) can be used as lighting equipment such as safety signs.