The analysis and simulation of fracture behavior of fused quartz under dynamic loading

Abstract

Abstract Fused quartz is widely utilized across various industries due to its superior performance. However, its brittleness often leads to fracture occurrences under variable external loads during processing or usage, making the investigation of its dynamic mechanical properties and fracture mechanisms crucial. In this study, the fracture strength variations of fused quartz under different loading rates were obtained through strength experiments. It was observed that when the velocity is below 2 mm/min, the loading rate has little influence on fracture strength. And when the velocity exceeds 2 mm/min, fracture strength rises with the increase in velocity. According to the fitted fracture strength-strain rate curve, a modified peridynamic failure criterion was developed to simulate the fracture process under different loading speeds. The simulated fracture morphology closely matched experimental results and the error in fracture load values is less than 8%. It validates the accuracy of the simulation. Additionally, it was found that the displacement values at the moment of fracture under different loading rates were relatively similar. It indicated that higher speeds result in greater loading energy, thus leading to the generation of more cracks and fragments. This study provides theoretical support and reference for understanding the fracture behavior of fused quartz.