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Procedure for determining fabric suitability for a particular compression clas Table 1. Parameters and dimensions of the compression band. Parameters calculated: cylinder circumference G, = 34,7 cm, seam width Ls = 0,4 cm.

Table 1 Procedure for determining fabric suitability for a particular compression clas Table 1. Parameters and dimensions of the compression band. Parameters calculated: cylinder circumference G, = 34,7 cm, seam width Ls = 0,4 cm.

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Improving the accuracy of determining circumferences G, can be achieved by eliminating manual dimensioning of the human body and replacing it with the 3D scanning technique [7-13]. As the same knitted fabric is often used for different lengths of circumferences Figure 1. Cylindrical model of a body part covered with a compression band.
Improving the accuracy of determining circumferences G, can be achieved by eliminating manual dimensioning of the human body and replacing it with the 3D scanning technique [7-13]. As the same knitted fabric is often used for different lengths of circumferences Figure 1. Cylindrical model of a body part covered with a compression band.
Figure 4. Hysteresis loops for the subsequent stretching ranges of a weft-knitted fabric plated with elastomeric yarn (variant 1). Figure 2. a) View of the face of a weft-knitted fabric plated with elastomeric yarns, b) Schematic record of the stitch of a weft-knitted fabric plated with elastomeric yarns. Fabric properties: wale density Pk =190/10 cm, course density Pr = 340/10 cm, surface density M = 260 g/m’.
Figure 4. Hysteresis loops for the subsequent stretching ranges of a weft-knitted fabric plated with elastomeric yarn (variant 1). Figure 2. a) View of the face of a weft-knitted fabric plated with elastomeric yarns, b) Schematic record of the stitch of a weft-knitted fabric plated with elastomeric yarns. Fabric properties: wale density Pk =190/10 cm, course density Pr = 340/10 cm, surface density M = 260 g/m’.
Figure 5. Hysteresis loops for subsequent stretching ranges of a warp-knitted fabric with elastomeric yarn as the weft (variant 2). Figure 3. a) View of the face of a warp-knitted fabric with elastomeric yarns as the weft, b) Schematic record of the stitch of a warp-knitted fabric with elastomeric yarns as the weft. Fabric properties: wale density Pk = 120/10 cm, course density Pr = 740/10 cm, surface density M = 234 g/m’.
Figure 5. Hysteresis loops for subsequent stretching ranges of a warp-knitted fabric with elastomeric yarn as the weft (variant 2). Figure 3. a) View of the face of a warp-knitted fabric with elastomeric yarns as the weft, b) Schematic record of the stitch of a warp-knitted fabric with elastomeric yarns as the weft. Fabric properties: wale density Pk = 120/10 cm, course density Pr = 740/10 cm, surface density M = 234 g/m’.
Figure 6. Three-element Zener model.
Figure 6. Three-element Zener model.
Figure 9. Force values as a function of relative elongation in the 6th hysteresis loop for different fabric stretching ranges (variant 1). Figure 7. Hysteresis diagram according to standard three-element Zener Model.
Figure 9. Force values as a function of relative elongation in the 6th hysteresis loop for different fabric stretching ranges (variant 1). Figure 7. Hysteresis diagram according to standard three-element Zener Model.
Figure 10. Force values as a function of relative elongation in the 6th hysteresis loop for different fabric stretching ranges (variant 2). Figure 8. Experimental diagram of hysteresis for a warp-knitted fabric with elastomeric threads as the weft
Figure 10. Force values as a function of relative elongation in the 6th hysteresis loop for different fabric stretching ranges (variant 2). Figure 8. Experimental diagram of hysteresis for a warp-knitted fabric with elastomeric threads as the weft
Figure 15. Extreme values of body circumferences G,,,_,,for particular compression classes. Series I — for the lower limit "of compression class, series 2 — for the upper limit of compression class Figure 13. Stretching of a weft-knitted fabric plated with elastomeric yarn — series 1, and its first derivative — series 2. However, this method of determining useful elongation is burdened with error, resulting from the subjective choice of the segment with the greatest curvature. Therefore in our tests useful elongation was determined on the basis of the firsi derivative of the function of the force and relative elongation dF/de, which describes the values of longitudina Figure 14. Graphic illustration of determining maximum body circumferences for the lower and upper limits of Ist compression class. Series 1 — for the lower limit of Ist compression class, series 2 — for the upper limit of Ist compression class, series 3 — force value for Eng. = 0,85 €,. “max
Figure 15. Extreme values of body circumferences G,,,_,,for particular compression classes. Series I — for the lower limit "of compression class, series 2 — for the upper limit of compression class Figure 13. Stretching of a weft-knitted fabric plated with elastomeric yarn — series 1, and its first derivative — series 2. However, this method of determining useful elongation is burdened with error, resulting from the subjective choice of the segment with the greatest curvature. Therefore in our tests useful elongation was determined on the basis of the firsi derivative of the function of the force and relative elongation dF/de, which describes the values of longitudina Figure 14. Graphic illustration of determining maximum body circumferences for the lower and upper limits of Ist compression class. Series 1 — for the lower limit of Ist compression class, series 2 — for the upper limit of Ist compression class, series 3 — force value for Eng. = 0,85 €,. “max
Figure 12. Stages of the procedure for de- termining fabric suitability for a particular compression class. Figure 11. Test results of unit pressure exerted by compression bands on a cylindrical model with circumference G, = 34,7 cm. Series I — pressure for variant W,, series 2 — pressure for variant W,, series 3 — intended pressure values.
Figure 12. Stages of the procedure for de- termining fabric suitability for a particular compression class. Figure 11. Test results of unit pressure exerted by compression bands on a cylindrical model with circumference G, = 34,7 cm. Series I — pressure for variant W,, series 2 — pressure for variant W,, series 3 — intended pressure values.
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