Improper rework practices can result in unscheduled maintenance or surface damage that causes crack initiation.

翻修不当可能会造成非计划性维修和表面损伤从而造成裂纹。

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Removing visible surface corrosion before pitting begins (such as during a C-check) helps prevent conditions that can lead to crack initiation.

在出现斑点之前去除可见的表面腐蚀(诸如c -检)有助于预防发生裂纹。

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Introducing the initial damage parameters of coal surface obtained by digital image processing in model, got the failure process corresponding stress state under the crack initiation and expansion.

将数字图像处理煤体表面得到的初始损伤参数引入所建立的模型中，得到了相应受力状态下的裂纹起裂、扩展破坏过程。

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