Fatigue fracture started from inner parts of materials

Crackling noise in fatigue fracture of heterogeneous materials

We present a theoretical study of the fatigue fracture of heterogeneous materials. A generic fiber bundle model is proposed, which provides a direct connection between the microscopic fracture mechanisms and the macroscopic time evolution of fatigue. In the model, material elements fail either due to immediate breaking or undergo a damage accumulating ageing process. On the macro-level the mode...

Fatigue fracture of hydrogels

Rapid advances are taking place to develop hydrogels of high stretchability and toughness, but fatigue fracture has not been studied for any hydrogels. This negligence hinders the development of hydrogels and their applications. Herewe initiate a study of fatigue fracture of hydrogels.We choose polyacrylamide hydrogel as a model material. To place fatigue fracture in context, we apply monotonic...

Stress Concentrations , Fatigue , Fracture

The fundamental topic in this document is the development of cracks in steel. For structures subjected to cyclic loads, such cracks can develop over time and ultimately reach the size at which some dramatic failure occur. While this problem is rare in structures made of “mild steel,” the use of “high tensile” steel changes that situation. It is straightforward to double the strength of mild ste...

Fatigue Fracture of the Fibula

Fatigue, or stress, fractures have been described as occurring in many situations and at widely differing ages from 15 months to 64 years. Most have occurred in young adults, particularly soldiers in training and athletes. Although fatigue fractures usually occur in weight-bearing bones, in particular the metatarsals and tibia, they also occur in the fibula, and have even been described in the ...

Fracture of Dental Materials