Two-scale modelling of fracture of magnesium phosphate cement under bending using X-ray computed tomography characterisation

This paper presents an efficient experimental-numerical analysis of fracture mechanics in magnesium phosphate cement (MPC) based on the structural and mechanical properties its constituents including potassium hexahydrate (MKP), oxide (MgO) pores. At micro-scale, energy material strength solid phases were obtained relying combination nanoindentation experiments simulation. The X-ray computed tomography (XCT) image-based 3D meso-structure model MPC beam was generated incorporated with finite element cohesive zone to analyse process under three-point bending. unknown parameters elements at interface between MKP MgO determined via calibration conditional experimental data terms relationship macro-load crack mouth opening displacement. strengths for MKP, MKP-MgO found be 5.8, 106 24 MPa, respectively. In same order, energies were0.02, 0.08 0.04 N/mm,