failure. The DBSO fracture shape consists of two oppositely: inclined outer main shear
fractures, inner main shear fracture, outer shear lips, and curved inner curved fractures. The
DBSO begins with two outer main shear fracture initiations under shear, vertical
compressive bending, and sideways bending deformations/stresses followed by the two
inner main shear fracture initiations under shear and vertical compressive bending …