Abstract The prediction of wheel/rail rolling contact fatigue (RCF) crack initiation during railway operations is an important task. Since RCF evolution influenced by many factors, its process complex. This paper reviews the existing approaches to predict initiation. region predicted shakedown map. By combining map with various criteria and critical plane method, life calculated. classification...

The cone bit is the most principal rock breaking tool in drilling engineering. statistical analysis of field data shows that early damage and failure sliding bearing one main reasons affect service life performance real process. Aiming at complex working environment with heavy load, high temperature mixed lubrication, paper establishes a multilevel line contact model rough surface carries out f...

Abstract We investigate rate-independent strain paths in a granular material generated by periodically oscillating stress cycles using particular constitutive model within the hypoplasticity theory of Kolymbas type. It is assumed that irreversible hypoplastic effects decay to zero when void ratio reaches its theoretical minimum, while turn related evolution volumetric through mass conservation ...

Renewable hydrogen may be produced in the near term at a cost that is competitive with natural gas reforming by integrating hydrogen production with existing industrial utilization of agricultural residues. A team of government, industrial, and academic organizations is developing a steam reforming process to be demonstrated on the gaseous byproducts from a process for making activated carbon f...