Abstract
In this paper the cracking of concrete under both flexural and shear stresses is studied in addition to mixed mode failure with new models under the application of flexural and shear stresses acting together. The cracking mechanism, crack initiation and propagation are studied. The expected path of each type of crack can be predicted. Critical stress intensity factors for cracking in bending and shear, cracking moment and critical cracking load can also be predicted. Stresses and strains in both concrete and steel can be determined. The results are relevant in the design of concrete structures using fracture mechanics theories.