【摘要】 本文从系统稳定理论的观点出发，推导出了Ｈｕｄｓｏｎ提出的试验发生条件（Ｋ＿ｍ＞Ｋ＿ｓ）；推广传统的塑性公设，提出了临界加载率准则，并将推广的塑性公设，应用到低周循环加载试验中，建立了循环加载试验破坏准则；从能量的观点出发，推导出了岩石发生稳定破坏后区仍有局部失稳破坏发生的条件；文中提出的一些观点得到试验的论证。更多还原

【Abstract】 The Hudson testing condition is deduced by system stability theory.The critical loading rate criteriOn is proposedand the failure criteria of cyckloading test are estaMishe bythe application of generialized plastic postulate to the low frequency cycling loading test.The local unstability failure condition after stability failure is deduced by energy principle.Some theories in this paper have been certificated by tests.更多还原