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Finite Element Analysis for the Interface of a Respirator and the Human Face -A Pilot Study
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 09, 2009 by SAE International in United States
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Comfort assessment of respirator fit plays an important role in the respirator design process and standard development. To reduce the cost and design time of respirators, the design, fit, and evaluation process can be performed in a virtual environment. Literature shows that respirator-induced discomfort relates to stress, area, and region of the face covered. In this work, we investigate the relationship between the strap tensions and the stress and deformation distribution on the interface between the respirator and the headform. This is the first step towards a comprehensive understanding of the contribution of contact stress to the mathematical comfort fit model. The 3D digital models for respirators and headforms have been developed based on 3D scanning point-cloud using a Cyberware® 3D digitizer. Five digital headform models have been generated: small, medium, large, long and short. We have demonstrated the contact problem between the respirator and the headform by using a large size headform and a respirator model in the ANSYS® environment. During finite element analysis, the respirator is “put on” the large size headform model and different strap tensions are applied. In this study, we consider the headform as a rigid body and the respirator to be deformable. The preliminary results show that the strap tensions play a key role in deforming the respirator and the contact stress distribution.
CitationDai, J., Yang, J., and Zhuang, Z., "Finite Element Analysis for the Interface of a Respirator and the Human Face -A Pilot Study," SAE Technical Paper 2009-01-2271, 2009, https://doi.org/10.4271/2009-01-2271.
- BittermanB.H.,: Application of Finite Element Modeling and Analysis to the Design of Positive Pressure Oxygen Masks, Master Thesis, Air Force Institute of Technology, Wright-Patterson Air Force Base, OH (1991)
- DamasceneJ., AbeysekeraA., and HoushangS.,: Ergonomics aspects of personal protective equipment: its use in industrially developing countries. Journal of human Ergology. 17, 67-79 (1988).
- HanD.H., WillekeK., and ColtonC.E.,: Quantitative fit testing techniques and regulations for tight-fitting respirators: Current methods measuring aerosol or air leakage, and new developments. American Industrial Hygiene Association Journal. 58:219-228(1997).
- MullinsH.E., DanischS.G., and JohnstonA.R.,: Development of a new qualitative test for fit testing respirators. American Industrial Hygiene Association Journal. 56:1068-1073 (1995).
- National Institute for Occupational Safety and Health (NIOSH): “Approval of Respiratory Protection Devices,” Code of Federal Regulations Title 42, Part 84. 2003.
- PiccioneD., and MoyerE.T.Jr,: Modeling the Interface between a Respirator and the Human Face. Army Research Laboratory, Human Engineering and Research Directorate, Aberdeen Proving Ground, Maryland (1997).
- ZhuangZ., and BradtmillerB.: Head and face anthropometric survey of U.S. respirator users. J Occup. Environ. Hyg. 2:567-576 (2005).
- ZhuangZ, BradtmillerB, and ShafferR: New Respirator Fit Test panels Representing the Current U.S. Civilian Work Force. J. Occup. Environ. Hyg. 4: 647-659 (2007).
- ZhuangZ., and ViscusiD., A new approach to developing digital 3-D headforms, SAE Digital Human Modeling for Engineering and Design, June 14-17, 2008, Pittsburgh, PA.