Simulated effects of head movement on contact pressures between headforms and N95 filtering facepiece respirators - part 1: headform model and validation

Details

• Personal Author:
  Ji X ; Lei Z ; Li N ; Rottach D ; Yang J ; Zhuang Z
• Description:
  In a respirator fit test, a subject is required to perform a series of exercises that include moving the head up and down and rotating the head left and right. These head movements could affect respirator sealing properties during the fit test and consequently affect fit factors. In a model-based system, it is desirable to have similar capability to predict newly designed respirators. In our previous work, finite element modeling (FEM)-based contact simulation between a headform and a filtering facepiece respirator was carried out. However, the headform was assumed to be static or fixed. This paper presents the first part of a series study on the effect of headform movement on contact pressures - a new headform with the capability to move down (flexion), up (extension), and rotate left and right-and validation. The newly developed headforms were validated for movement by comparing the simulated cervical vertebrae rotation angles with experimental results from the literature. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Manufacturing And Industrial Facilities Occupational Health Personal Protective Equipment Protective Clothing Respiratory Protective Devices Respiratory System Safety
• Keywords:
  Air-purifying-respirators Analytical-models Anthropometry Author Keywords: Contact Pressure Biomechanical-modeling Biomechanics Equipment-design Equipment-reliability Face-masks Filtering Facepiece Respirator Finite Element Method Headform Headgear Head Movement Materials-testing Motion-studies Performance-capability Personal-protective-equipment Physical-exercise Pressure-testing Respirators Respiratory-equipment Simulation-methods Testing-equipment

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• ISSN:
  0003-4878
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; OSHA Region 6 ; Pennsylvania ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  NPPTL - National Personal Protective Technology Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  58
• Issue:
  9
• NIOSHTIC Number:
  nn:20045010
• Citation:
  Ann Occup Hyg 2014 Nov; 58(9):1175-1185
• Contact Point Address:
  James Yang, Department of Mechanical Engineering, Human-Centric Design Research Laboratory, Texas Tech University, Lubbock, TX 79409, USA
• Email:
  james.yang@ttu.edu
• Federal Fiscal Year:
  2015
• NORA Priority Area:
  Healthcare and Social Assistance
• Peer Reviewed:
  True
• Source Full Name:
  Annals of Occupational Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:85ff45c7acc9e51baa3a2dbce880eaa426b67ea1db4a3716ec13df7dd62146884809db7e1a57f45b34ea65c4499258293b098f5c9b47b461e51fb16d1a854fe7
• Download URL:
  https://stacks.cdc.gov/view/cdc/200566/cdc_200566_DS1.pdf
• File Type:
  [PDF - 2.95 MB ]