Dynamic Ease Allowance in Arm Raising of Functional Garment

Abstract

: The functional garments are important protective device for the disciplinary forces, such as police, fireman and soldier. Typical protective garments are made of special non-stretchable fabric and hence can restrict the movement of the wearer if the garment is not designed properly. A protective garment that can ensure maximal range-of-motion can be a difference of life and death when the disciplinary force is on duty. There are many aspects of range-of-motion. In the current study, we address the question of the appropriate amount of dynamic ease allowance (movement ease) required for any given height that the arm is supposed to reach. The relationship among the dynamic ease allowance, under arm sleeve length, and side seam length was derived, by using the rod joint model of the human being and assuming the motion is a cross-sectional one along the frontal plane. Sixty subjects wore the special net garment to record the reference of zero dynamic ease allowance, and then the adjustable garments of different scye depth, which is related to the dynamic ease allowance. The subjects were asked to move their arm along a vertical plane, from rest position to the maximum height that they can reach. Such motions were recorded by a motion capturing system. The experimental data was compared to the theoretical prediction. Since the analysis was conducted using the 3-D data and the garment measurements must be converted from the 3-D environment (when the garment is worn) to the 2-D environment (when the garment is not worn). The conversion approximation is also presented. Consequently, when the required posture is known, the required scye depth and the required dynamic seam allowance can be found. The armhole can be designed accordingly.

Study Regarding the Kinematic 3D Human-Body Model Intended for Simulation of Personalized Clothes for a Sitting Posture

“…First, the wearing ease allowance, which refers to the amount of added fabric allowed over and above the body dimensions to ensure the comfort, mobility and drape of clothing, and secondly, design ease allowance, which refers to the amount of added fabric to achieve a particular design and shape. Ng R. et al [ 62 ] classified ease allowances according to three different functions: (a) basic movement, breathing and sitting, which require static ease allowances and also known as standard ease; (b) nonstandard body shapes (fat, thin, big hip, strong leg,…) and their movements (walking, jumping, running, etc. ), which require dynamic ease allowances; and (c) styling ease, which is the extra spacing required to conform the desired shape.…”

The Use of New Technologies for the Development of Protective Clothing: Comparative Analysis of Body Dimensions of Static and Dynamic Postures and its Application

“…To provide the wearer with ergonomic comfort of a clothing made from a fabric, in the first place, the clothing pattern designs and appropriate ease allowances must be considered. Classifications of the ease allowances are many: static, dynamic, styling, fabric ease allowances, and so on [10][11][12]. Nevertheless, the wearing ease allowance, also the so-called dynamic ease allowance, can obstruct body movements and impede the functional use of clothing.…”

Compressed loop method for the bending behaviour of coated and laminated fabrics analysis

“…It means that clothing construction must be optimal and the deformation ability of fabrics should be taken into account. As a rule, the materials of two or more layers used for protective clothes are more rigid [1,4]. Fabrics lamination with polymer film may increase their bending stiffness about 13-20 times [5], coating up to 3 times [3,6].…”

“…Coated and laminated fabrics are made in a wide range of constructions to meet extensive range of applications. They are used for protective clothing, automotive and marine application, for household goods and in many other areas [1]. These fabrics are usually subjected to a wide range of deformation such as bending, folding, creasing, wrinkling and stretching in different directions and of different forces which are often acting at the same time.…”