Published in SN Applied Sciences
Floor failure is the leading cause of mine water inrush after coal mining above the confined aquifer. Therefore, the prediction of floor failure depth is an important content of mine water prevention. The mining-induced failure depth and goaf floor characteristics are researched to grasp the goaf failure condition after the inclined coal seam minin...
Published in Mechanics of Soft Materials
Hydrogels are highly hydrated polymer networks. The synergistic association of a fluid and an elastic phase is the key of numerous applications of hydrogels as food or cosmetic products, drug delivery vectors, wound dressings, scaffolds for tissue regeneration... Since the natural environment for many of these applications is a wet or liquid one, e...
Published in Journal of Mountain Science
The primary cracks in the rock block undergo series of steps and finally disintegrate, during this procession, the radius affects the impact force of rock block in clastic flow. Therefore, it is essential to figure out the evolution mechanism of crack propagation for the design of engineering protection. In this study, based on fracture mechanics a...
Brittle fracture in ferritic steels is a field in which a lot of research has been performed over the years. Most of this research has been done on uniaxially loaded specimens, such as single edge notched bend specimens. From these experiments, the maximum principal stress criterion is used in the Weibull distribution method as proposed by Beremin,...
Dans ce manuscrit, une nouvelle méthode pour prendre en compte l’effet du gradient et prédire la durée de vie en fretting-fatigue est proposée.Cette approche consiste à représenter le mouvement au voisinage du front de contact en utilisant un ensemble de degrés de liberté et de champs spatiaux de référence.Les facteurs d'intensité de ces champs spa...
International audience
Published in Tribology Letters
A number of authors have experimentally assessed the influence of friction on adhesive contacts, and generally the contact area has been found to decrease due to tangential shear stresses at the interface. The decrease is however generally much smaller than that predicted already by the Savkoor and Briggs 1977 classical theory using “brittle” fract...
Crack growth is an important failure mechanism in many engineering materials. Numerical models for crack growth have been developed within the framework of damage mechanics. All these models aim for the same goal, obtaining accurate results for crack growth under various loading conditions. Many damage models are based upon the cohesive crack appro...
Published in Journal of the Brazilian Society of Mechanical Sciences and Engineering
The Generalized/eXtended Finite Element Method (G/XFEM) is applied as a very useful tool in the resolution of complex structural models using an effective approach to represent the existence of cracks and other micro-defects. This is an unconventional formulation of the Finite Element Method (FEM), in that there is an expansion of the approximate s...
Orthotropic steel decks (OSDs) are susceptible to fatigue failure due to cyclic loading by heavy traffic passing the deck. These cyclic loads can cause fatigue cracks in the rib-to-deck joint. In and around the joint residual stresses are present due to the welding process. In this thesis, the effects of residual stresses on the fatigue crack propa...
