玻璃结合剂磨料用于高速应用中，必须确保其机械可靠性。现有安全规范中概述的超速防护试验程序考虑了这些材料强度的可变性和时间依赖性。断裂力学原理准确地描述了这种行为，并可确定超速试验，以确保防止过早失效。在较高的运行速度下，由于疲劳而导致的失效概率和强度退化急剧增加。 结果是，随着运行速度的提高，对验证测试的需求增加。现有的断裂力学理论适用于这种高速。

VITREOUS-BONDED ABRASIVES ARE BEING USED IN HIGH SPEED APPLICATIONS WHERE THEIR MECHANICAL RELIABILITY MUST BE ASSURED. THE OVERSPEED PROOF TEST PROCEDURE AS OUTLINED IN EXISTING SAFETY CODES TAKES INTO ACCOUNT THE VARIABILITY AND TIME-DEPENDENCY IN STRENGTH EXHIBITED BY THESE MATERIALS. FRACTURE MECHANICS PRINCIPLES ACCURATELY DESCRIBE THIS BEHAVIOR AND CAN DETERMINE AN OVERSPEED PROOF TEST TO ASSURE AGAINST PREMATURE FAILURE. AT HIGHER OPERATING SPEEDS, THE PROBABILITY OF FAILURE AND THE STRENGTH DEGRADATION DUE TO FATIGUE INCREASE DRASTICALLY. THE RESULT IS THE INCREASED NEED FOR PROOF TESTING AS OPERATING SPEEDS ARE INCREASED. EXISTING FRACTURE MECHANICS THEORY IS APPLICABLE AT THESE HIGH SPEEDS.