Abstract
In order to analyze the mechanical relaxation phenomenon of copper plated poplar veneer multilayer composite, the multilayer composite materials with different structures are taken as the experimental object, the effect of temperature, structure and moisture content on the stress relaxation of poplar treated with chemical treatment is studied. The study on stress relaxation provides basic theory and technical parameters for the research and application of geothermal floor materials in wood material industry. The results show that the relative stress relaxation of the three structures of A, B and C tends to slowly change with the increase of joint size. Under the same temperature condition, the change rate of relative stress is A structure>B structure>C structure. The reason is that the stress relaxation of the material is aggravated after the veneer in the A structure is swollen by moisture. Because the copper ions in the surface copper layer blocks the moisture, the C structure retards the stress relaxation. The B structure has two factors of A and C, and the stress relaxation changes in the center.
