We study the near-tip singular fields for an interface anticrack between dissimilar anisotropic elastic materials using the sextic Stroh formalism. The stress and strain fields exhibit an oscillatory singularity and a square root singularity at the anticrack tip. A complex and a real strain/rotation intensity factors are introduced to scale, respectively, the two singularities. An explicit expression for the negative anticrack contraction force is obtained in terms of the proposed intensity factors. We illustrate our results using an example in which the bimaterial is orthotropic. In this typical case, a complex stress intensity factor can also be defined to replace the complex strain/rotation intensity factor.

我们使用性Stroh形式主义研究了异种各向异性弹性材料之间界面抗裂的近尖端奇异场。应力场和应变场在抗裂尖端处表现出振荡奇异性和平方根奇异性。复杂度和实际应变/旋转强度因子分别按比例引入两个奇点。根据建议的强度因子，获得了抗龟裂收缩力的明确表达式。我们使用双材料为正交各向异性的示例来说明我们的结果。在这种典型情况下，还可以定义复应力强度因子来代替复应变/旋转强度因子。