Molecular Dynamics Study on Crack Angle Effect on Amorphous Silica Fracture Performance

To investigate the effect of crack angle on fracture performance brittle materials under tensile load, a molecular dynamics simulation method based ReaxFF is used to establish an amorphous silica model through high-temperature melting and annealing process. Under environment 300 K, 1.013 × 105 Pa 5 109 s−1, impact from three perspectives analyzed: material mechanical properties, micro process, energy evolution. The result indicates that as increases, ultimate strain stress decrease accordingly. propagation path will exhibit “Z” shape due coupling shear stress. elastic efficiency new surface increase with in angle, most generated at 45° angle. linear regression asymptotic are fit trends respectively, correlation coefficients R2 0.986 0.994. In actual comminution input required for crushing well area morphology after can be changed by adjusting between load main being broken.