ABSTRACT Traditionally, for hard materials, two types of straight disclinations are identified although some Somigliana disclinations with different aspects have been treated theoretically. Here, we consider four physically distinct types of curved generalised disclinations, one of which reduces to two straight types, giving a total of five. We indicate typical applications for the different types.

中文翻译：

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直线和曲线向错和位错等价物

摘要 传统上，对于硬质材料，虽然理论上已经处理了一些具有不同方面的 Somigliana 向错，但仍确定了两种类型的直线向错。在这里，我们考虑四种物理上不同的弯曲广义向错类型，其中一种减少为两种直线类型，总共有五种。我们指出了不同类型的典型应用。