Design, manufacture, and mechanical performance analysis of LVS structural plywood

This paper focused on Laminated Veneer Sandwich (LVS) structural plywood, systematically expounding its structural design and key production processes, and comparatively analyzing the mechanical properties such as elastic modulus of LVS and Laminated Veneer Lumber (LVL) through dynamic and static testing methods. LVS uses populus deltoides LVL as the core layer and Medium-Density Fiberboard (MDF) as the surface layer, adopts a "transverse-longitudinal-transverse" cross-grain composite structure, and is made through processes such as gluing, blanking, and cold pressing, effectively integrating the mechanical strength of LVL and the surface performance of MDF.Dynamic test results show that the ratio of longitudinal to transverse elastic modulus of LVS is only 13% of that of LVL, indicating that LVS is closer to an isotropic material and significantly superior to LVL in the balance of longitudinal and transverse mechanical properties. Static four-point bending tests further confirm that LVS not only has higher deformation resistance, but also has better surface flatness and coating compatibility, fully meeting the requirements of GB/T 17657—2013 and GB/T 11718—2009 standards.The research shows that LVS achieves efficient utilization of fast-growing populus deltoides by optimizing structural design and process parameters, boasts broad application prospects in construction, furniture, decoration, and other fields, and is of great significance for promoting the upgrading of China's wood processing industry and realizing a win-win situation of economic and social benefits.