Rock creep model establishment method considering viscoelastic-plastic strain separation

• Main Authors: JIN HAOPENG, HUANG JIANYU, HU XIUYUE, YANG CHUNCHUN, SHI WEI
• Format: Patent
• Language: Chinese; English
• Published: 02.12.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a rock creep model establishment method considering viscoelastic-plastic strain separation, which comprises the following steps: performing a uniaxial loading and unloading creep test on rock by adopting a graded loading and unloading mode, and drawing a rock full strain-time curve; the method comprises the following steps: processing test data, and drawing a graded loading and unloading creep-time curve; and establishing a rock creep model considering viscoelastic-plastic strain separation according to the relation curve of different types of strain and time and the constitutive equation of the rheological element. The rock creep model provided by the invention can accurately describe the graded loading and unloading creep process of the rock, and is of great significance to stability prediction of underground surrounding rock. 本发明公开了一种考虑黏弹塑性应变分离的岩石蠕变模型建立方法，包括采用分级加卸载方式对岩石进行单轴加卸载蠕变试验，绘制出岩石全应变-时间曲线；通过对试验数据进行处理，绘制出分级加卸载蠕变-时间曲线；根据不同类型应变与时间的关系曲线和流变元件的本构方程，建立考虑黏弹塑性应变分离的岩石蠕变模型。本发明提出的岩石蠕变模型能够