Quantitative validation of 3D garment simulation software for determination of air gap thickness in lower body garments

E Mert,C Luible-Bär,A Psikuta,R M Rossi,M Arevalo,C Charbonnier,M A Bueno

doi:10.1088/1757-899x/254/16/162007

Abstract

The heat and mass transfer through the garment to maintain the heat balance between the human body and the environment is dependent on the air gap thickness underneath the garment, which in turn is affected to a great extent by the body movement. Therefore, in this study, 3D garment simulation software was quantitatively validated by comparing the air gap thickness results obtained for stationary postures simulated by 3D simulation software and measured with 3D scanning method. The aim was to assess the capability of 3D garment simulation software to accurately determine air gap thickness distribution. Moreover, the effect of differences between air gap thickness of real and virtual garments on the thermal resistance of the garments was evaluated for individual body regions. It was found that the agreement between the two methods was within the range of 10 mm for air gap thickness. This difference resulted in small differences in thermal resistance for tight (up to 0.025m2K/W) and loose fit (up to 0.013m2K/W).

Highlights

The clothing has a basic function to protect human body from external hazards and to keep it in a state of well-being [1]
The determination of air gap thickness was done on manikins which were in stationary postures using advanced 3D scanning methods [4,5,6,7]
For both air gap thickness results from real and virtual garments, the air gap thickness was smaller for convex body regions such as pelvis, anterior thigh and calf, whereas it was larger for concave body regions such as posterior thigh and shin

Summary

Introduction

The clothing has a basic function to protect human body from external hazards and to keep it in a state of well-being [1]. The determination of air gap thickness was done on manikins which were in stationary postures using advanced 3D scanning methods [4,5,6,7]. Developed 3D scanners enable to evaluate the distribution of the air gap thickness on garments during movement by capturing up to 15 frames per second. The derivation of the air gap thickness between the skin and the garment would be impossible due to the poor posture and movement control (nude and dressed bodies need to be of exactly same shape for imposition and calculation of the parameters).

Objectives

Methods

Discussion

Conclusion