Criterion of the limit state of composites materials

The work proposes and substantiates a type of phenomenal criterion of composite material destruction at the stage of macro crack origination. It considers damageability and two mechanisms of destruction: tearing and slice. It describes that as parameter of damageability it can be taken specific energy of extra stresses or specific energy of diffusion. For proportionate and complex processes of metallic materials loading they result equally in practice. Methodologies of respective energetic parameters search are described. It is set threshold value of stress in the element of construction during the reach of it it is necessary to consider an accumulation of damage. It is described the methodology that describes interconnection between anisotropy factors and components of damage tensor.