In-situ hybridization design and bearing capacity of TPMS

LI Fan; LUO Ketong; LI Jiayao; LIU Peihong; LU Lina; LU Chun

doi:10.16579/j.issn.1001.9669.2025.11.008

Abstract：TPMS porous structures possess excellent mechanical properties and high specific surface area,making them commonly applied in structural design.However,the hybridization between different structures and the effects of hybridization parameters on model performance remain insufficiently studied.Accordingly,the in-situ hybridization of Diamond and Schwarz P models within TPMS porous structures were conducted,and the mean deviation angle was analyzed.Additionally,a novel Diamond/Schwarz P model was fabricated using FDM,and the pore characteristics,compressive strength,and deformation behavior of the models under various hybridization parameters were explored.The results indicate that the bearing capacity of the Diamond/Schwarz P models exhibit nonlinear variation under different hybridization proportions.Specifically,the original Schwarz P model exhibits a compressive strength of 1.72 MPa and a mean deviation angle of 48.48°.Among models primarily based on Schwarz P,the model with a ratio of 3∶7 exhibits the best bearing capacity,with a compressive strength of 2.17 MPa and a mean deviation angle of 49.36°.The original Diamond model has a compressive strength of 5.57 MPa and a mean deviation angle of 52.06°.Among models primarily based on Diamond,the model with a ratio of 8∶2 exhibits the best bearing capacity,with a compressive strength of 6.05 MPa and a mean deviation angle of 52.09°.However,bearing capacity of models decrease at the ratio of 6∶4 and 7∶3,accompanied by a reduction of the mean deviation angle.On this basis,the reasons for differences in bearing capacity among different models were explained using the mean deviation angle,which successfully predicted that the model exhibits the best capacity at the ratio of 8∶2,thus demonstrating the conclusion that parameter design can accurately regulate the bearing capacity of the model.