Miners Rule

1. Introduction

Miners Rule (1945) is a cumulative damage concept being used widely to predict fatigue cracking of a material. The amount of damage is defined by a damage ratio of the predicted load repetition at each stress or strain level and the allowable load repetition.

The damage of material occurs when the cumulative damage ratio between the predicted and the allowable load repetitions is equal to 1.

2. Allowable Load Repetition of Asphalt and Concrete Pavement2.1 Asphalt Pavement

The fatigue cracking is related to the tensile strain of the Asphalt pavement. And the allowable load repetition of Asphalt pavement is defined as described in the following table:

NAllowable Load RepetitionDeveloper

1Asphalt Institute

2Shell

3Thompson, 1987

4Powell et al., 1984

5Verstraeten et al., 1982

Note: E* is a dynamic modulus

2.2 Concrete Pavement

The fatigue cracking is related to the ratio of stress and the modulus of rupture of concrete pavement. And the allowable load repetition of concrete pavement is defined as described in the following table:

NAllowable Load RepetitionDeveloper

1

PCA (Packard and Tayabji, 1985)

2

3

4

5