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

从1980年到1985年进行的破坏性测试的破碎镜子被保存下来；这个收藏的独特之处在于它源于窗户、玻璃板和镜子表面上自然出现的缺陷。选定的试件将用扫描电子显微镜进行分析，以确定除其他观察外：自然产生的临界流动的一般形状；新的和风化的玻璃板表面出现的缺陷的形状和大小的差异；当在均匀载荷下进行全尺寸试验时，以及使用同心圆试验时，两种类型的试件的临界流动之间的差异；在不同的流动方向/应力方向关系下，断裂应力与缺陷尺寸之间的关系。

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.