Prediction method for clothing pressure distribution by the numerical approach: attention to deformation by the extension of knitted fabric

Abstract

In general, clothing pressure is measured using a sensor set on the surface of a human body or dummy, and it is not possible to measure clothing pressure without the sewing process. We have developed a numerical-analysis-based technique to simulate clothing pressure without having to sew the cloth into clothes. We presupposed that clothing made of knitted fabric was applied to a mannequin in close contact with its surface. Based on this simulation, this paper proposes a model for fabric deformation, by extension applicable to large deformation, with anisotropy and non-linearity taken into account. In this model, the fabric is separated into isotropic and anisotropic elements, and non-linearity is assigned to both the isotropic and anisotropic elements. Furthermore, to use this model, we propose a method for fitting the knitted fabric tightly to a human body model while sewing the knitted fabric model reflecting the paper pattern. To prevent excessive extension of the knitted fabric model reflecting the paper pattern during the process of fitting, we adopted the two-step fitting method involving application of the fabric to a temporary human body model (intermediary) followed by its application to a formal human body model. The clothing pressure values calculated with this method were very close to the actually measured values using a rigid mannequin.

Analysis of Clothing Pressure on the Human Body in Motion

“…where C 10 is the material parameter and i  ( 1,2,3) i  represents principal stretch ratios. The first…”

Basınç Konfor Performasını Etkileyen Parametreler ve Basınç Konforunun Ölçümü

“…Analiz sonuçları ve objektif ölçümlerin birbirleriyle tutarlılık gösterdiğini doğrulayan bir çok çalışma yapılmıştır [66,67,68,69]. Sonlu elemanlar metodu (FEM) ile elde edilen modellerin, sadece giysi basıncı tahminlemesi için değil ayrıca giysi deformasyonun tahminlemesi için de kullanışlı ve genel olarak doğru modeller olduğunu belirtilmiştir [70].…”

Relationship between Jacket Comfort and Stiffness of Adhesive Interlining

“…Changes to bending rigidity and shear stiffness could affect jacket comfort. There are many studies on the relationship between pressure and garment comfort of tight fit garment giving high pressure such as underwear, socks and stockings [7][8][9]. However, researches on the effect of compression on the outer garment such as a jacket are less.…”