本文应用损伤理论研究裂纹尖端区域，得到了裂纹尖端的损伤场。

The damage theory is used to study the region of the crack tip and the crack tip damage field is obtained.

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地下洞室施工时围岩损伤场的动态监测对裂隙岩体的安全施工相当重要。

Dynamic damage monitoring of cracked rock mass during construction is very important for the safety.

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该曲线族可以转换成相同损伤量下交变应力与循环数关系的等效损伤线族，显示了损伤场全貌。

These curves are then transformed into equivalent damage curve family. Thus the full fatigue damage field is shown .

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