考虑损伤门槛的统计损伤本构模型研究

Study on statistical damage constitutive model in consideration of damage threshold

摘要: 在统计损伤理论的基础上,从统计损伤本构模型的一般性公式出发,考虑到岩石的受力状态,提出统计损伤本构模型应考虑损伤门槛的影响,建立了考虑损伤门槛的统计损伤本构方程。以石膏角砾岩的常规三轴试验结果作为实例,进行了验证。理论计算结果与试验结果对比表明,考虑损伤门槛的统计损伤本构模型是更加合理的。

Abstract: Based on statistical damage theory,it is put forward that damage threshold should be considered in statistical damage constitutive model and a statistical damage constitutive equation is established in consideration of the impact of damage threshold.Conventional triaxial compression test results of gypsum breccias are taken as example to verify the model.Through the contrast between theoretical calculated results and conventional test results,it is showed that statistical damage constitutive model in consideration of damage threshold is rational.