Estimation of road coating reliability under limited loads calculated by means of fracture mechanics method

The article considers a method evaluating reliability of the logging road coverings in consequence of the extreme size cracks’ occurrences under single load application. The well-known methods of fracture mechanics are used. The authors of the article used this method earlier to assess reliability of steel structures. In contrast to the classical approach, the calculation of a particular component of the tensor directions is not considered, instead the intensity of the existing stresses as a whole is calculated. The probability of a non-failure work is defined by the analytical method for any given distribution law. Some special cases for the Gauss law of normal distribution and two-parametrical Weibull distribution are considered. The results presented in the article were obtained for static loading. The probability approach proposed in the article can be fully applied to the case of dynamic loading. Though it should be noted that instead of the critical stress intensity factor in the obtained dependencies the critical stress intensity factor under dynamic loading should be used.