In a rail track structure, turnout is used as transition between straight and branching rails therefore withstands complex dynamic rolling impact loading. This paper reports comprehensive failure investigation of railway off-track made from Hadfield austenitic cast steel. The worn was examined using optical microscopy, scanning electron micro-hardness, quantitative X-ray diffraction analyses. A...

In this study, the problem of finding the complete trajectory of propagation in plates with internal straight cracks is extended to the non-linear field. In particular, results concerning concrete plates in bi-axial tensile loading are shown. The concrete constitutive law adopted for this purpose is monotonically non-decreasing, as following according to previous studies of the Authors on monot...

Paris law constants are commonly obtained with a well established procedure based on standard specimens, notched and pre-cracked. Pre-cracking produces through cracks with stable shapes, nearly straight, similar during all propagation. However, in several situations specimens with corner and surface cracks are recommended. In these cases cracks having significant propagation will continuously m...