本文通过四荷载V氏压痕玻璃方板,在空气中利用四种加载速率的同轴双环弯曲动疲劳试验,发现玻璃强度与加载速率成正比例关系,并得出结论:高强度区的破坏是由尖裂纹萌生造成的;低强度区的破坏是由亚临界裂纹扩展所致。根据试验结果,利用自编的多项式曲线拟合程序,求得破坏荷载及破坏时间的Weibull分布模数m。利用动疲劳强度与加载速率的关系,求得裂纹扩展参数n,并评价了玻璃使用的可靠性问题。 In this paper, four kinds of V-indentation glass square panels were used in the air. Four kinds of coaxial double-ring bending dynamic fatigue tests were carried out in the air. It was found that the glass strength was directly proportional to the loading rate. The conclusion was drawn that: Caused by the spike crack initiation; the destruction of the low-intensity zone is caused by the expansion of the subcritical crack. According to the test results, the Weibull distribution modulus m of failure load and failure time is obtained by self-programmed polynomial curve fitting program. Using the relationship between dynamic fatigue strength and loading rate, the crack propagation parameter n was obtained and the reliability of glass used was evaluated.