This article reviews recent works concerning the damage area size ahead of a crack front in oxide glasses. Literature exemplifies the importance of understanding the crack propagation dynamics in oxide glasses with a number of papers concerning dynamic and stress corrosion cracking in complex (and simplified) oxide glasses. In general, the linear elastic fracture mechanic equation breaks down near the crack front, in a zone frequently called the process zone. The question is how large is this zone near the crack tip? This paper reviews four different techniques to capture the process zone size in pure silica: Atomic force microscopy imaging, neutron diffraction, photon capture, and molecular dynamics simulations. Velocities of the crack front range between stress corrosion cracking dynamics and dynamic fracture, thus providing a better understanding of how the process zone depends on the velocity of the crack front.

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二氧化硅及其加工区

本文回顾了有关氧化物玻璃裂纹前的损伤区域尺寸的最新工作。文献用大量有关复杂（和简化）氧化物玻璃中的动态和应力腐蚀开裂的论文来举例说明理解氧化物玻璃中裂纹扩展动力学的重要性。通常，线性弹性断裂力学方程式在裂缝前沿附近被分解，通常被称为加工区。问题是裂纹尖端附近的区域有多大？本文概述了四种在纯二氧化硅中捕获过程区大小的技术：原子力显微镜成像，中子衍射，光子捕获和分子动力学模拟。裂纹前沿的速度介于应力腐蚀裂纹动力学和动态断裂之间，