Improved Unsteady Maxwell Rock Creep Model and Parameter Identificatio
In order to address the issue of traditional creep models failing to accurately reflect the characteristics of rock accelerated creep stage,this paper proposes an enhanced unsteady Maxwell creep model based on the conventional Maxwell model.It takes into consideration the unsteady creep parameters of original clay pot elements in series with a nonlinear viscoplastic body(NVPB),and deduces the corre-sponding creep constitutive equation.The improved model comprehensively simulates the nonlinear creep behavior throughout all stages of rock creep,thereby enhancing accurate description.Additionally,origin software is utilized for fitting different rock samples.The research findings demonstrate that this new creep constitutive model better fits the experimental data and identifies parameters,effectively simulating rock´s deformation under various stress levels while accurately describing the nonlinear creep characteristics of its three stages of creep.This indicates high accuracy and strong applicability of the newly established model.It provides a new creep constitutive model for future geotech-nical engineering.
rock mechanicsMaxwell modelnonlinearityaccelerated creepparameter inversion
万方数据
维普
