Finite Element Study On The Pressure Of Short Sock Top In Women’s Based On 3D Human Modeling

In daily life,consumers are unable to try on the socks,so it is easy for the structure and elasticity of the socks to fail to meet the needs and comfort of the buyers.In order to make the socks conform to the human foot morphology,physiological characteristics and movement function to the maximum extent possible while satisfying the dressing comfort,the structure optimization design of socks is the key factor of socks design.If the sock top is too loose,the sock will easily slip off from the leg;if the sock top is too tight,it will easily cause pressure on the human foot and ankle,resulting in impaired blood circulation and discomfort,which may even lead to health problems.This study takes the daily worn socks as the research object,and explores the mechanical contact relationship between the sock top and the ankle through 3D human modeling and finite element simulation,in order to optimize the design and improve the structure of the sock top through the change trend of pressure,displacement and human volume shrinkage,so as to ensure the comfort and movement function of the human body while meeting the basic dressing requirements of the socks.The main research content of this topic is as follows:(1)Establishment of three-dimensional model of human foot and ankle socks top partsUsing the CT images of human foot and ankle as the base data,MIMICS was used for image segmentation,material assignment and 3D human modeling,and 3-matic was used for meshing and materialization of the model.Six commercially available experimental compression socks were selected for pressure measurement at the sock top,and the validity of the finite element model was examined by comparing the finite element simulation with the actual pressure measurement data.(2)The finite element simulation of the stress state of the sock top and the force analysis of the ankle at the sock top after wearingAfter verifying the validity of the finite element model of the human foot and ankle,the measured pressure data of the sock top were averaged and applied to the finite element model in the form of load to analyze the changes of pressure distribution and soft tissue deformation in the sock top.Using the human foot and ankle as the object of study,a three-dimensional model of the foot and ankle was established by applying MIMICS,and ABAQUS finite element simulation was applied to simulate the pressure distribution at the leg top and the changes of force in each region after the human body wore the compression socks.(3)Three-dimensional deformation analysis of human ankle at sock topThe pressure distribution trend and displacement magnitude at the sock top after dressing were obtained by finite element simulation.In order to study the compression state of the leg by the sock top after wearing the compression short socks,the human leg cross-section at the sock top was divided into 8 regions equally by angle,and each 45°was a region.Among them,region I was divided into 45° in clockwise direction starting from the front of the leg,and then the rest of the regions were divided into 45° as an interval in clockwise direction in turn.The function relationship between pressure and displacement in each region was obtained by curve fitting,and then the volume shrinkage distribution relationship of each of the 8 regions after leg compression was calculated.The results showed that the volume shrinkage of soft tissue was the largest in the right posterior region Ⅳ of the leg at the sock top,followed by the volume shrinkage in regionⅤ(left posterior part of the calf)and region Ⅲ(right posterior part of the calf),the smallest volume shrinkage in region Ⅰ(right anterior part of the calf),the volume shrinkage in region Ⅱ(medial anterior part of the calf),region Ⅵ(right posterior part of the calf)and region Ⅷ(left anterior part of the calf)was about twice that of region Ⅰ,and the volume shrinkage in region Ⅶ(left front part of calf)volume shrinkage is 3times that of area Ⅰ,area Ⅲ volume shrinkage is about 4 times that of area Ⅰ,area Ⅳ(right back part of calf)and area Ⅴ volume shrinkage is 5 times that of area Ⅰ.The conclusion visually reflects the compression state of the leg at the sock top after the human body wears short socks,which can provide a theoretical basis for the optimization and improvement of the sock top structure to meet the comfort demand,and provide data reference for the design of the sock clothing structure in accordance with the human physiological characteristics and sports functions.