Cutting Experiment And Simulation Of Muscle Tissue

With the continuous development of modern medicine and computer technology,virtual surgery combines three-dimensional soft tissue simulation modeling and virtual reality technology to achieve the simulation of surgical procedures,allowing surgeons to obtain a large number of simulated surgical tests,where improving the success rate of surgery,training of interns,etc.provides the technical support.However,in the process of three-dimensional soft tissue simulation modeling,it is difficult to establish an accurate simulation model because the soft tissue is complex and has a special structure.This paper establishes a precise soft tissue simulation model,combines theoretical analysis and experimental research,and performs the cutting simulation study of muscle tissue,and optimizes its cutting parameters,so as to visualize the muscle tissue simulation cutting process and predict the cutting results.First,a viscoelastic constitutive equation modeling method for muscle tissue is proposed.This method is based on the Kelvin-Voigt model and combines hyperelastic properties with viscoelastic properties.The data constants are used to fit and extract the material constants of the hyperelastic properties and the viscoelastic properties,and the viscoelastic constitutive equations of the muscle tissue are established.Second,design and build a tension and pressure experimental platform for muscle tissue,and carry out the experimental and simulation verification of the proposed viscoelastic constitutive equation.Through the muscle tissue tensile compression experiments,the material constants of the hyperelastic and viscoelastic properties are fitted and extracted,and the muscle tissue compression simulation model is established.By comparing the compression experiment with the compression simulation,the proposed viscoelastic constitutive equation is applied to Muscle tissue,and showed significant viscoelastic properties.Then,the muscle tissue cutting experiment platform is designed and built to study the fiber-to-muscle cutting experiments under the surgical conditions.Through the establishment of a dedicated muscle tissue cutting experiment platform,cutting experiments at different cutting angles and cutting speeds are performed;cutting forces,local stiffness,fracture toughness,and tensile yield stress under different cutting parameters are compared,as well as the tissue deformation during the cutting process.With microscopic topography analysis,the cutting process of muscle tissue under surgical conditions is optimized to reduce muscle tissue damage.Finally,a simulation modeling method for muscle tissue cutting is proposed to simulate the muscle tissue cutting process and verify the experiment.Through the constitutive equation fitting and extraction results,the hyper-elastic stage and plastic stage of muscle tissue are divided,the muscle tissue fracture stage is determined through the cutting process experiment,and the muscle tissue material model is constructed and the cutting process simulation is performed;different cutting methods,cutting angles,cutting are performed.The simulation process under the conditions of depth and cutting speed,study the surface integrity,chip shape,deformation state,stress distribution and cutting force change during the cutting process,which ensures cutting simulation accuracy;Optimize the cutting process of muscle tissue under complex conditions,reduce muscle tissue damage,and provide simulation support fortissue-to-instrument contact for complex conditions,which are difficult to experimentally study.