Soil Behavior Modeling by MPS-Cae Simulation

Abstract

Many numerical simulation methods have been developed in the current research field. The authenticity of the simulation-based research depends on the accuracy of the model prepared. The modeling of the soil becomes challenging when there is the presence of water and the soil starts behaving like a fluid. This study focuses on the application of the MPS (moving particle semi-implicit) -CAE (computer-aided engineering) method to design the setup for the unconfined compression test to determine the correct parameters of the soil model. The soil material is assumed to be Bingham fluid and will be employed as a biviscosity model, where the soil particle exists at both rigid and fluid states depending upon the condition. The best-fitting soil model was designed for the primary parameters and is compared with the benchmark soil data to justify the claim. Furthermore, the authors endeavored to find the secondary governing factors that will affect the accuracy of the soil modeling. The results show that the values of the primary parameters are influenced by the values of the secondary parameters, resulting in a different model. The influence of the secondary parameters was studied, and the best-fitting soil model was designed by incorporating both primary and secondary parameters. The resultant soil model is expected to provide more accurate results if used as a reference in various construction simulations.

Applicability of Numerical Simulation by Particle Method to Unconfined Compression Tests on Geomaterials

“…Next, to deduce the relationship between plastic viscosity and the yield value, it is important to notice the relation between plastic viscosity and the unconfined compressive strength. Since an increase in plastic viscosity results in an increase in unconfined compressive strength [26], and the fact that the yield value is generally taken as half the unconfined compressive strength [27], it can be concluded that the yield value is influenced in a direct proportional relationship by the plastic viscosity, which is in agreement with the concept suggested by Equation 6. However, when the particle sizes are changed, the same output unconfined compressive strength value is obtained for the much lower value of plastic viscosity [14].…”

“…For soil containing a low water content, the repulsive electrostatic force is high [35]. Considering the low water content and higher particle distance in the samples used in this simulation, it was assumed that the influence of surface tension would be for the unconfined compression tests of the soil samples, as they would remain in the rigid state of the bi-viscosity model [26]. Thus, the calculation of surface tension is omitted in this study by assigning the calculation method as none.…”

“…Therefore, it becomes essential to establish the influence of the dependency of the plastic viscosity value on other parameters in order to determine the exact value. In a previous study, Shakya & Inazumi [26] concluded that plastic viscosity has a directly proportional relationship with the unconfined compressive strength if the yield value and yield parameter are kept constant. It can be inferred that the plastic viscosity value, when changed by adjusting the critical shear strain, significantly influences the output results.…”

“…However, a simulation was conducted to verify whether or not this would be true for the simulation parameters in this study. A study for the yield parameter has already been done [26]; thus, the present study will not conduct a separate study for the sensitivity analysis of the yield parameter. As for the remaining parameters, a sensitivity analysis for both Samples 1 and 2 was performed.…”

A Comprehensive Review of Sustainable Assessment and Innovation in Jet Grouting Technologies

“…The adoption of the Moving Particle Simulation (MPS) method with Computer Aided Engineering (CAE), that is MPS-CAE simulation in geotechnical engineering represents a significant step towards more sustainable construction practices [76][77][78][79][80][81][82][83][84][85][86]. In particular, Inazumi et al [14] innovatively applied MPS-CAE simulation to analyze and elucidate the intricate construction mechanisms underlying jet grouting technology.…”