Analysis of Critical Flaws on the Surfaces of Window Glass Using a Scanning Electron Microscope

1980年至1985年进行的破坏性试验中的破碎反射镜 被保存;这个集合是独一无二的，因为它起源于 窗户玻璃板和镜面上自然产生的瑕疵。 选定的标本将使用扫描电子显微镜进行分析。 显微镜来确定，除其他观察外：一般形状 自然发生的临界流;形状和 新窗和风化窗表面缺陷的大小 玻璃板;两种类型的临界流量之间的差异 在均匀载荷下进行全尺寸试验时， 使用同心环测试;以及 不同流动方向/应力方向的失效和缺陷尺寸 关系。

Fractured mirrors from destructive tests performed from 1980 to 1985 were saved; this collection is unique in that it originated from naturally occurring flaws on window glass plate and mirror surfaces. Selected specimens will be analyzed using a scanning electron microscope to determine, among other observations: the general shapes of naturally occuring critical flows; differences between shapes and sizes of flaws occurring on the surfaces of new and weathered window glass plates; the differences between the critical flows for both types of specimens when tested in full scale under uniform loading, and when using the concentric rings tests; and the correlation between stress at failure and flaw size at various flow direction/stress direction relationships.