Fatigue Mechanisms in High‐Strength Silica‐Glass Fibers
Tóm tắt
We use experimentally determined crack growth data for silica glass and a fracture mechanics model for delayed failure to predict the fatigue behavior for high‐strength silica‐glass fibers. The results of this model indicate that fracture mechanics methods can be used to adequately describe the fatigue behavior observed for high‐strength silica‐glass fibers at room temperature in humid conditions. The key feature to properly interpreting the fatigue of high‐strength fibers is the use of a fracture‐rate law in which the crack extension rate increases exponentially with applied stress. We show that a fracture mechanics approach to highstrength fiber fatigue can provide the basis for identifying additional fatigue mechanisms that may control failure in more aggressive fatigue environments.
Từ khóa
Tài liệu tham khảo
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