CAD technology for clothing biomechanical engineering design

Pao Yue-kong Library Electronic Theses Database

CAD technology for clothing biomechanical engineering design

 

Author: Wang, Ruomei
Title: CAD technology for clothing biomechanical engineering design
Degree: Ph.D.
Year: 2007
Subject: Hong Kong Polytechnic University -- Dissertations.
Computer-aided design.
Textile fabrics -- Mechanical properties.
Textile fabrics -- Physiological aspects.
Clothing and dress -- Physiological aspects.
Human comfort.
Department: Institute of Textiles and Clothing
Pages: xx, 220 leaves : ill. ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2165719
URI: http://theses.lib.polyu.edu.hk/handle/200/3350
Abstract: The purpose of research is to establish a theoretical framework of integrated CAD system for clothing biomechanical engineering design by developing computer simulation and visualization platform. A mathematical model and visualization environment have been developed to simulate the dynamic mechanical interactions between clothing and human body during wear to reveal skin pressure distributions and distributions of stresses and strains in human body, as well as their impact to human psychological sensory perceptions. The CAD system is applied to establish scientific principles and framework for biomechanical engineering of biofunctional textile products to meet the requirements of biomedical and healthcare applications. Clothing engineering design is a complex process, which generates and uses large volume of dynamic data with rich data structure and different categories of variables, such as specifications, engineering design orders, technical data, problem reports, design models and analysis files. An engineering design database management system for clothing biomechanical engineering design must provide powerful data management functions to support the design process. A flexible and multi-layer engineering database has been developed to meet the needs of clothing biomechanical engineering design. Clothing biomechanical engineering design is a systematic and quantitative way of designing functional apparel products with 3D simulation of mechanical interactions of deformable human body and clothing, and prediction of clothing pressure sensory comfort performance. A hybrid simulation model has been developed by integrating mathematical models with computation algorithms to derive 3D garment data from a garment's 2D pattern and to specify human body-garment contacting conditions for computational simulations. Clothing biomechanical engineering design is a complex iterative-decision-making process. To increase efficiency in this complex process, an integration CAD system has been developed to provide an integrated environment from functional specification, data management, biomechanical computational simulation, design visualization and evaluation. To evaluate the pressure comfort performance of the design, a computational model has been developed to predict the mechanical sensory perception from skin pressure distributions, internal deformations, stresses and strains that are induced by the dynamic mechanical interactions between clothing and human body. To support designers and engineers to evaluate the biomechanical functional performances and sensory comfort of their design, visualization interfaces have been developed, which can not only present the quantitative data in scientific format, but also can transform the quantitative data to 3D color images to visually illustrate skin pressure distributions, deformations, stress and strain distributions in internal structure of the body, also create 3D color map to visualize the pressure sensory perceptions at different parts of the body. In summary, a theoretical framework for clothing biomechanical engineering design have been developed as an systematic CAD platform, which integrates engineering database, 3D geometric construction model, biomechanical simulation model, mechanical sensory perception simulation model, visualization interfaces of simulation results. This integrated CAD system provides a technology platform for design and engineering of textiles and apparel products on the basis of scientific data with effective visual illustrations.

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