Design and Compressive Behavior of a Photosensitive Resin-Based 2-D Lattice Structure with Variable Cross-Section...

Efficient material use in lattice structures remains a challenge in 3D printing. Prior research has shown that 2-D lattices can balance strength and weight. However, no prior work had resolved how variable cross-sections affect compressive performance. This gap motivated the current study. Existing models often assume uniform cross-sections. That uncertainty drove the need for a new analytical approach. Researchers have not yet tested how radius ratios influence material efficiency. This uncertainty limited design optimization. Theoretical predictions must align with experimental validation. This paper aims to bridge that gap.

The goal was to design 2-D lattice structures with variable cross-sections using photosensitive resin. The specific problem was to improve material efficiency while maintaining compressive strength. The motivation came from the need for lightweight yet strong components. Stereolithography 3D printing enabled precise control over geometry. Researchers wanted to test how radius ratios affect performance. Theoretical models were needed to predict failure types. Experimental validation was essential to confirm predictions. This study aimed to optimize core design for real-world applications.

Researchers used stereolithography 3D printing to fabricate 2-D lattice structures. They varied the core cross-sections using different radius ratios. An analytical model predicted compressive responses and failure types. Theoretical calculations focused on material utilization efficiency. A flatwise compression test validated the model's predictions. The core radius at the ends and middle was adjusted systematically. The study considered power functions for cross-section variation. Experimental data were compared to theoretical results for accuracy.

Theoretical and experimental results matched well for compressive behavior. When R/r = 1.167, material efficiency improved significantly. For n = 1, efficiency increased by 13.227%. At n = 2, the gain was 19.068%. For n = 3, the improvement reached 22.143%. The model accurately predicted failure modes under compression. Radius ratios directly influenced structural performance. Higher power functions led to greater efficiency gains. These findings suggest optimal design parameters for lattice structures.

The study confirmed that variable cross-sections improve material efficiency. Radius ratios and power functions are critical design factors. The analytical model reliably predicted compressive behavior. Experimental validation supported theoretical conclusions. Designers can use these findings to optimize 3-D printed lattices. The results apply to lightweight structural components. The approach can guide future lattice structure development. These conclusions align with the authors' stated objectives.