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The inward displacement perpendicular to the body surface produced by external pressure is an important index to evaluate the pressure comfort and optimal design of apparel products. In this paper, we studied on the functional relationship of pressure, displacement and angle when the body was in dynamic state after dressing. The dynamic pressure was divided into two parts: pressure with time (instantaneous, 1, 2, 4, 8 and 12 h) and pressure with movement (walking which described as upright position, leg lift 10°, leg lift 30° and foot backward off the ground). The displacement of each point on the lower leg cross section in four stages of walking process and six periods of time were simulated by ANSYS finite element software. After fitting, the functional curves between pressure/displacement ratio and the angle were obtained. By comparing, we found out that all the curves were presented nearly complete uniform curving form no matter what state of the human body was in. That is, when the human body was under clothing pressure, the corresponding displacement value on the body surface can be calculated on the premise of the known pressure value at any point of lower leg cross section during the wearing process by functional equation. All these solutions supplied a theoretical reference for optimal design of the top part of men's socks. [ABSTRACT FROM AUTHOR]

Socks are one of the most important clothes in people's daily life. This study aimed at the problems existing in the wearing of socks, took the top part of men's socks as research object, and the contact between human body and socks as elastic contact. The position and shape of skin, soft tissue, and bones in lower leg cross section were acquired through non-contact three-dimensional human scanning and CT scan. Based on these, finite element model of the lower leg cross-section and top part of socks were established for the first time, respectively. Because wearing socks is a continuous process, consequently, we defined the maximum time putting on the sample socks as 12 h in this research work, and then divided the periods of dressing time into six stages, which were instantaneous, 1 h, 2 h, 4 h, 8 h, and 12 h, respectively. After simulating the distribution of pressure and displacement of the top part of socks in dressing using ANSYS software, we divided the lower leg cross section into 12 equal regions according to angle considering the displacement distribution, and then obtained the area shrinkage of each region in six periods of times by calculation. According to the tendency of area shrinkage distribution, the top part of men's sock could be designed with a different degree of elasticity in diverse regions combined with subjective pressure comfort during the course of sock design. All these solutions are of great significance to the optimization design of socks and can provide theoretical basis for the structural improvement of functional socks and the prediction of clothing pressure. [ABSTRACT FROM AUTHOR]

This paper reports a study of pressure, displacement, and area shrinkage mass distribution with time between the human body and compression garment using finite element method according to ergonomics. After creating the function between pressure/displacement ratios and angle, it indicated that multiple relationship between pressure and displacement almost unaffected by wearing time. The corresponding displacement value can be calculated on the premise of the known pressure value at any point and any time during the wearing process by functional equation. Considering displacement distribution, we divided the lower leg into 12 equal regions according to angle, and then calculated area shrinkage mass of each region. According to area shrinkage mass distribution, the top part of men’s sock could be designed with different degree of tightness combined with subjective pressure comfort. All these solutions supplied a theoretical reference for optimal design of the top part of men’s sock. [ABSTRACT FROM PUBLISHER]