但由于孔隙的存在，岩石内部的应力分布出现非对称性，导致劈裂裂纹偏离纵向对称轴；
The stress distribution of rock is asymmetric due to the presence of pores existing. The failure cracks deviate from vertical axis of symmetry.
破断面观察结果显示，在室温中，氢气会导致平滑试片在表面形成裂纹，而在凹槽试片中产生劈裂破坏形态。
Fractographic observations showed that hydrogen could induce surface cracks for smooth specimens and a cleavage fracture pattern for notch specimens at RT.
最终形成劈裂裂纹穿越孔隙，出现较宽的破坏裂纹。
The split cracks penetrate pores, and finally wider failure cracks appear.
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