Mechanical behavior of porous solid considering mesoscopic elastic buckling

• Published in: International journal for numerical and analytical methods in geomechanics 2020-05, Vol.44 (7), p.962-982
• Main Authors: Zhang, Hao‐Yue, Hu, Xiao‐Xong, Zhao, Gao‐Feng
• Format: Article
• Language: English
• Subjects: Bearing capacity; Buckling; Deformation; Elastic buckling; Exact solutions; Investigations; lattice spring model; Mathematical models; Mechanical properties; Nonlinear response; nonlinear responses; Porosity; porous solid
• ISSN: 0363-9061; 1096-9853
• DOI: 10.1002/nag.3029

Summary In this work, the elastic buckling of porous solids was investigated using a lattice spring model (LSM). The capability of the LSM to solve elastic buckling problems was comprehensively verified by comparing well‐established numerical and analytical solutions. Following this, the buckling of a porous solid was studied, in which two porous structures were considered, ie, the random porous model and the Voronoi porous model. The results reveal that both the porosity and the shape of the pores influence the elastic buckling bearing capacity of the porous solid. Finally, the mechanical responses of a porous solid with an extra high porosity (0.85) were numerically investigated. Our numerical results demonstrated that the nonlinear elastic response of the porous solid might come from its mesoscale elastic buckling. This work shows the ability and promise of using the LSM as a fundamental numerical tool for the deep investigation of the buckling mechanical behavior of porous solids.