Reasons for changes in the value of unit pressure of compression products supporting external treatment

48th Conference of the International Federation of Knitting Technologists (IFKT)

材料科学;轻工业

Kowalski, K.^1 ; Ilska, A.^1 ; Klonowska, M.^1

Lodz University of Technology, Zeromskiego Street 116, Lodz, Poland^1

关键词: Confidence interval;    Cylindrical models;    Experimental research;    Human silhouette;    Quantitative and qualitative assessments;    Quantitative changes;    Radius of curvature;    Variable radius;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/141/1/012002/pdf
DOI  :  10.1088/1757-899X/141/1/012002

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The paper presents the basics of modelling compression products with intended values of unit pressure for body circumferences with fixed and variable radius of curvature. The derived relationships referring to the dimensions of the fabric's circumferences in a relaxed state of the product were based on Laplace law, local values of the radius of curvature, and the characteristics of stretching and relaxing (deformation) of the knitted fabric, described by experimental relation for the stress and relaxation phase for the 6th hysteresis loop, taking into account confidence intervals. The article indicates the possibilities of using 3D scanning techniques of the human body to identify the radius of curvature of various circumference of the human silhouette, for which the intended value of the unit pressure is designed, and quantitative changes in the body deformation due to compression. Classic method of modelling and design of compression products, based on a cylindrical model of the human body does not provide in each case the intended value of unit pressure, according to specific normative requirements, because it neglects the effect of different values of the radius of curvature of the body circumference and the properties of the viscoelastic knitted fabrics. The model and experimental research allowed for a quantitative and qualitative assessment of the reasons for the changes in the value of unit pressure of compression products supporting the process of external treatment.