incipient crack meaning in English

初裂
初期裂缝
初期裂纹
初生裂隙
初始裂缝
起始裂裂

In the cohesive theory , fracture is regarded as a gradual process in which the separation of the incipient crack flanks is resisted by cohesive tractions . the relation between the cohesive tractions and the opening displacements is governed by a cohesive law
内聚模型理论中，断裂认为是一个渐变过程? ?初始裂纹两侧的分离受到内聚力的阻挠，内聚力与张开量是由内聚关系确定的。