本文是借助一个简单的原子模型去讨论解理裂纹的位错本质,并引入解理位错的慨念去解释解理断裂过程所观察到的一些现象。 因为解理裂纹扩展的结晶学性质及其变化很容易用上述模型来阐明,故同裂纹的连续位错模型比较,它也是一种值得研究的模型。 In this paper, we use a simple atomic model to discuss the dislocation essence of cleavage cracks and introduce the concept of dislocation dislocation to explain some phenomena observed in the cleavage fracture process. Because the crystallographic properties of cleavage crack propagation and their changes can easily be elucidated by the above model, it is also a model worth studying for comparison with the continuous dislocation model for cracks.