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中文摘要：
在讨论摩擦类材料的屈服及强度特性的基础上提出了一种将子午面内二维屈服迹线扩展到三维主应力空间的方法，将此扩展方法应用于Mohr-Coulomb准则，获得了一种新型的广义屈服面．对这种广义屈服面的特性进行了广泛的分析和讨论，还将此屈服面分别应用于各向同性和横观各向同性摩擦材料，并与现有试验数据进行拟合对比，结果表明这种新型的屈服面可以很好地模拟摩擦类材料的屈服特性，可以涵盖部分经典屈服面，适用性更强．
英文摘要：
This paper discusses the yielding and strength characteristic of friction materials. A new method is proposed to expand 2-D yield curve in p-q plane into 3-D yield surface. When applying this method to Mohr-Coulomb yield surface, a generalized yield surface is obtained. Characteristic of this generalized surface is depicted. The yield surface is applied to isotropic and anisotropic friction materials, and the result shows its capability of fitting the yielding characteristic of such materials reasonably. Finally, this yield surface is compared with four classical yield surfaces and some other researchers＇ study results. Comparison shows the proposed yield surface, which covers the scope of these classical yield surfaces, is more applicable.
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