Research And Visualization Of Female Elastic Underwear Structure Based On Body Shape

In order to improve the fit and comfort of women’s knitted underwear at the age of 25 to40,the body shape characteristics of women’s upper body were analyzed by measuring their body shape data,and the prototype version of women’s knitted underwear was designed by using UVW expansion function.The Geomagic Studio reverse engineering software,CLO3 D virtual fitting and sample fitting were used to visualize the wearing effect of knitted underwear.Finally,a three-dimensional surface model of the relationship between garment pressure and chest and waist looseness was constructed using MATLAB software.The main contents are as follows:First,3D scanner was used to obtain the data of female upper body size between 25 and40 years old,including 28 measurement items of 140 samples.SPSS software was used to conduct paired sample test and singular value test was conducted.Six abnormal samples were removed.The correlation analysis of the data of upper body shape shows that chest circumference,waist circumference and abdominal circumference are highly correlated with their width and thickness respectively,and height has a great influence on each longitudinal variable.SPSS software was used for principal component factor analysis of the measurement items.Four principal component factors were extracted from 28 measurement items,namely,circumference factor,longitudinal factor,transverse factor and length factor.Combined with correlation analysis,height,chest circumference,waist circumference and abdominal circumference were extracted from 28 measurement items as the key parameters of body type classification by the method of principal component correlation index.The correlation indexes were 0.8,0.56,0.59 and 0.59,respectively.MATLAB software was used to calculate the sum of the squares of the errors in the cluster of the sample measurement items and draw the lithograph to get the best scheme of body type classification into four categories.In SPSS software,K-means clustering method was used to classify the upper body type of women aged 25 to 40 into four categories: A-chunky body type,B-high chunky body type,C-obese body type and D-thin body type.Its percentage is 26.1%,26.1%,25.4%,22.4%.The Geomagic Studio retrograde engineering software was used to repair the four types of body shapes,and then CLO3 D automatic virtual model conversion function was used to form a visual model and specific comparative analysis of body shapes was performed.Second,skin expansion was carried out on the visual model by using the expansion of UVW expansion function.The initial prototype with chest saving was obtained by calculating the proportional relationship between the actual back length and the back length of the skin expansion map.At this time,the chest saving of the four types of prototypes were 2.22 cm,2.11 cm,1.67 cm and 1.75 cm respectively.CLO3 D virtual fitting function is used to realize the visualization of the wearing effect of the initial prototype,and the initial prototype is optimized and adjusted according to the unreasonable part.After the chest save was transferred to armhole save,the armhole save was adjusted and increased,and the armhole save was 3.4cm,5.9cm,6.3cm and 3.9cm,respectively.Then the shoulder and waist were adjusted according to the problems existing in the initial prototype of different body types.The provincial experiment was carried out on the prototype version after the adjustment and integration,and the provincial scheme was finally determined to get the prototype version of knitted jacket without darts,and on this basis,the prototype version of knitted underwear was designed.Thirdly,6 kinds of knitted fabrics commonly used in the market are selected for elasticity test,and the low-elasticity fabric 5,the medium-elasticity fabric 6 and the high-elasticity fabric 4 are selected.CLO3 D virtual fabric test and calculation are carried out on these three kinds of fabrics,and the real fabric is converted into electronic fabric.After applying different fabrics to the knitted underwear prototype,the visualization of clothing pressure distribution is realized in CLO3 D and the pressure test points of the pressure test experiment are set accordingly.49 test points are selected from the chest and back,waist and abdomen,and arm of the human upper limb and the pressure test is carried out.According to the test results and the looseness value of the garment prototype,the looseness range of the pressure test experiment was determined.By arranging and combining the loose range of chest and waist,49 kinds of loose combination modes are obtained.The structure design of four types of knitted underwear is carried out according to 49 kinds of combination and the structure is imported into CLO3 D for virtual pressure experiment.The pressure of chest and waist when the human body wears knitted underwear under different loose conditions is measured.On this basis,MATLAB software is used to draw the 3D curved surface model of the relationship between chest and waist looseness and clothing pressure,and the comfortable looseness range under different fabric conditions is obtained.Select appropriate chest and waist size to generate a comfortable version under different fabrics,and carry out virtual fitting display and sample display.Based on the actual dressing needs,the research results provide data basis and reference for the design and development of women’s knitted underwear products at the age of 25 to 40,which can meet the needs of women’s knitted clothing customization and mass production.At the same time,it also helps to achieve the purpose of fitting and comfort for women at the age of 25 to 40,and improve the happiness of dressing.