Hicher, PYChang, CS2024-04-262024-04-262007-0110.1016/j.ijsolstr.2006.07.007https://hdl.handle.net/20.500.14394/4965unsaturated granular material, stress-strain relationship, capillary forces, microstructure, elastoplastic model,A microstructural elastoplastic model for unsaturated granular materialsarticle