Optimization and Mechanical Properties of Fabricated 2D Wood Pyramid Lattice Sandwich Structure

• Published in: Forests Vol. 12; no. 5; p. 607
• Main Authors: Yang, Dongxia, Fan, Changsheng, Hu, Yingcheng
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.05.2021
• Subjects: Bearing capacity; Compression; compressive behavior; Compressive properties; Energy absorption; Epoxy resins; Failure analysis; Failure modes; Finite element method; Lattice design; lattice sandwich structure; Lattice trusses; Lattice vibration; Load; Mechanical properties; Optimization; Plywood; Prefabrication; Sandwich structures; Splicing; Stress analysis; Systems design; Timber; Unit cell; veneer reinforcement; wood pyramid
• ISSN: 1999-4907; 1999-4907
• DOI: 10.3390/f12050607

In order to obtain a lightweight, high strength, and large design space wooden sandwich structure to meet the needs of modern wooden buildings, the mechanical properties of a fabricated 2D wooden pyramid lattice sandwich structure were studied. In this paper, the mechanical and compressive properties of the specimens with different arrangement of Lattice Sandwich unit cells are studied. The upper and lower panels and core materials are made into a single unit cell by inserting glue, and the prefabricated 2D wooden pyramid lattice truss core sandwich structure is prepared by the mortise tenon splicing method. The results show that the arrangement of the unit cells in the specimen has a significant effect on the bearing capacity, energy absorption, and failure mode of the specimen, and the flat compression performance of the panel-reinforced specimen is better than that of the specimen with unreinforced veneer. The results of finite element analysis are consistent with the test results. The main failure modes are core fracture and panel cracking. These results provide a theoretical basis for the system design of wood-based lattice sandwich structure in the future.