Causes of fracture of energy storage electrical equipment

What is the fatigue fracture mechanism of a sample?

Fatigue fracture mechanism of sample was explained using the cohesive zone model. The early warning effects of three different fatigue failure signals were discussed. With the exploitation of deep-earth energy, the challenges posed by fatigue disturbance and high temperatures are becoming increasingly severe.

What causes fatigue fracture behavior?

Wang et al. (2021) proposed that thermal cracking caused by high temperatures and weakening of mineral grain boundary strength are the main reasons for the different fatigue fracture behaviors.

How does tensile stress affect a fracture?

In the area above the FPZ tip, the tensile stress increases linearly with the COD, which is considered to be the elastic zone. At this time, fracture energy accumulates inside the rock, inducing fracture. In the area below the FPZ tip, the tensile stress decreases as the COD increases.

What is fatigue fracturing technology?

Fatigue fracturing technology uses pulsating pressure to fracture hot dry rocks, allowing stress relaxation at the crack tip. Compared with conventional fracturing, it has great potential in reducing the risk of induced earthquakes (Li et al., 2022).

What are the most common circuit breaker failures?

As it can be seen from Table 4, the most common failures occur when circuit breakers open when they should not (false tripping). The next most common failures are due to spontaneous internal faults. A circuit breaker opening when it should not is referred to as false tripping.

Does fatigue crack growth occur in thermal storage rocks?

Although some existing studies have begun to focus on the fatigue failure process of rocks, the fatigue crack growth mechanism in thermal storage rocks is still unclear, there are few studies on fracture models, and the research on fatigue failure signals is also mostly limited to a single indicator.