Hypoplastic particle finite element model for cutting tool-soil interaction simulations:Numerical analysis and experimental validation  

作　　者：Abdiel Ramon Leon Bal Ulrich Hoppe Thai Son Dang Klaus Hackl Günther Meschke 

机构地区：[1]Inustitute for Structural Mechanics,Ruhr-Uniuersitdit Bochun,Germany [2]Inustitute of Mechanics of Materials,Ruhr-Universitit Bochun,Germany

出　　处：《Underground Space》2018年第1期61-71,共11页地下空间（英文）

摘　　要：This study presents numerical and experimental models for the analysis of the excavation of soft soils by means of a cutting tool.The computational model is constructed using an Updated Lagrangean(UL)velocity-based Finite Element approach.A hypoplastic formu-lation is employed to describe the constitutive behavior of soft soils.Large displacements and deformations of the ground resulting from the cutting tool-soil interaction are handled by means of the Particle Finite Element method,characterized by a global re-meshing strat-egy and a boundary identification procedure called a-shape technique.The capabilities and performance of the proposed model are demonstrated through comparative analyses between experiments and simulations of cutting tool-soft soil interactions.The experiments are performed using an excavation device at Ruhr-Universita¨t Bochum(RUB),Germany.The main details concerning the setup and calibration and evolution of the measured draft forces are discussed.Selected computational results characterizing the cutting tool-soft soil interaction including the topology of the free surface,void ratio distribution ahead of the tool,spatio-temporal evolution of the reaction forces and abrasive wear behavior are evaluated.

关 键 词：Velocity-basedfinite elements formulation HYPOPLASTICITY Large deformations Particlefinite elements Cutting tool-soil interaction Excavation experiments 

分 类 号：TG1[金属学及工艺—金属学]