Study of contact characteristics between a respirator and a headform

Details

• Personal Author:
  Cai M ; Lei Z ; Li H ; Ma Y ; Shen S ; Zhang X
• Description:
  This article presents a computational study on contact characteristics of contact pressure and resultant deformation between an N95 filtering facepiece respirator and a newly developed digital headform. The geometry of the headform model is obtained based on computed tomography scanning of a volunteer. The segmentation and reconstruction of the headform model is performed by Mimics v16.0 (Materialise, Leuven, Belgium), which is a medical image processing software. The respirator model is obtained by scanning the surface of a 3M 8210 N95 respirator using a 3D digitizer and then the model is transformed by Geomagic Studio v12.0 (3D system, Rock Hill, SC), a reverse engineering software. The headform model contains a soft tissue layer, a skull layer, and a separate nose. The respirator model contains two layers (an inner face sealing layer and an outer layer) and a nose clip. Both the headform and respirator are modeled as solid elements and are deformable. The commercial software, LS-DYNA (LSTC, Livermore, CA), is used to simulate the contact between the respirator and headform. Contact pressures and resultant deformation of the headform are investigated. Effects of respirator stiffness on contact characteristics are also studied. A Matlab (MathWorks, Natick, MA) program is developed to calculate local gaps between the headform and respirator in the stable wearing state. [Description provided by NIOSH]
• Subjects:
  Occupational Health Personal Protective Equipment Respiratory Protective Devices Safety
• Keywords:
  Author Keywords: Digital Headform CT Scanning Face-shields Filters Finite Element Method Fit And Comfort Models Respirator Respirators Respiratory-protection Respiratory-protective-equipment

  More +
• ISSN:
  1545-9624
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  NPPTL - National Personal Protective Technology Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  33
• Issue:
  3
• NIOSHTIC Number:
  nn:20047015
• Citation:
  J Occup Environ Hyg 2016 Mar; 13(3):D50-D60
• Contact Point Address:
  Shengnan Shen, School of Power and Mechanical Engineering, Wuhan University, Wuhan, China 430072
• Email:
  00030684@whu.edu.cn
• Federal Fiscal Year:
  2016
• NORA Priority Area:
  Healthcare and Social Assistance
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5b5f2e2fbd0d3a7f8ffa8268f5ec509f62503c3e27dda6cd8bee832187101ac7bf11bde908fda333df8e0d8e1f5bed6850f85a64600614f9a0fa999d9dec3776
• Download URL:
  https://stacks.cdc.gov/view/cdc/202251/cdc_202251_DS1.pdf
• File Type:
  [PDF - 1.49 MB ]