公开(公告)号：US20240408825A1

公开(公告)日：2024-12-12

申请号：US18646737

申请日：2024-04-25

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Weidong SONG ,  Lijun XIAO ,  Genzhu FENG

IPC: B29C64/386 ,  B33Y50/00

Abstract: Disclosed is a method for designing a gradient minimal surface structure based on a surface density distribution. The method comprises initializing pending parameters of a two-dimensional surface equation and a minimal surface equation in a system; generating a plurality of pending parameter sets based on initial values and preset ranges of the pending parameters of the two-dimensional surface equation and the minimal surface equation using a CSPRNG; establishing a plurality sets of two-dimensional surface equations and a plurality sets of minimal surface equations; establishing a plurality of gradient structure equations; generating a plurality of three-dimensional models of minimal surface structures; making a plurality of gradient structure specimens by an additive manufacturing technique; obtaining a plurality sets of structure stress-strain curves and force-displacement curves by performing a test; calculating a platform stress and an energy absorption of the plurality of gradient structure specimens; and determining target structure types to realize an optimized design of the gradient minimal surface structure based on the surface density. The mechanical response stability and the energy absorption performance of the minimal surface structures can be improved.