叉车货叉失效方式主要表现为塑性变形超差，脆性断裂和早期疲劳断裂。

Fork failure of a forklift truck mainly takes a form of plastic deformation exceeding allowable limit, fragile breakage and early stage fatigue breakage.

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小学学周先以早期疲劳为主，后期处于显著疲劳状态，属不良神经活动类型。

For primary pupils, early stage fatigue at the beginning of the week, notable fatigue at the end of the week can be detected, which is an unhealthy phenomena of nerve activity.

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因此，在齿面非正常接触导致齿顶接触应力过大的情况下，该齿轮发生了早期疲劳剥落。

Due to the above mentioned defects, early fatigue peeling occurs under the condition of overly contact stress at the top of the tooth caused by abnormal contact at the tooth surface.

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