Anisotropic theoretical fatigue damage model for concrete material based on tensile strain Increment-A new novel proposed theory

Anisotropic theoretical fatigue damage model for concrete material based on rigorousness degradation law of continuum damage mechanics theory of concrete materials due to tensile strain increment reflected as a newly proposed theory for quantification of fatigue damage is developed by utilizing the Helmholtz Free Energy (HFE) related to the thermodynamics and micromechanics concept. A strain which is taken as the main domain for initiation of microcracks, microvoids, and microfracture is taken as the main diagnosis tools for fatigue damage prediction as a form of governing constitutive theoretical equations is developed to carry out the stiffness dilapidation, diminution in the Young's Modulus of springiness, injury growth consistent with regularized life, accretion, decease in axial strain, loss in strength, increase in the transverse strain as well as Poisson's ratio, cyclic behavior in elastic damage process, stress reduction and strain-based theoretical fatigue damage model are well developed. The theoretical results thus obtained are validated through the experimental results of the author [Benard Isojeh et al. (2017)], [5].