Sound-absorption and mechanical properties of multisheet Gyroid lattice structures by stereolithography

Sound-absorbing materials with high load-bearing capacities are particularly important in many engineering applications. However, the low load-bearing capacity of conventional sound-absorbing materials limits their engineering applications. In this study, a multisheet parallel design concept is employed to design multisheet sound-absorbing and load-bearing lattice structures. Results show that the multisheet structure outperform the single-sheet lattice structure. The former exhibits a maximum absorption coefficient of 1, a 1x increase in the maximum average absorption coefficient, and a 127x increase in the maximum frequency compared with the latter. Under compression, the multisheet structure exhibits elastic modulus and yield strength values that are 0.43 and 0.52 times those of the single-sheet structure, respectively. Compared with different sound-absorbing structures, the multisheet structure exhibits remarkably high peak absorption coefficients and significant sound-absorbing performance advantages in specific frequency bands. This study presents a new design approach for creating multifunctional structures with sound-absorbing and load-bearing capabilities.