Influence of Averaging Time-Interval on Shoe-Floor-Contaminant Available Coefficient of Friction Measurements

Details

• Personal Author:
  Beschorner KE ; Cham R ; Iraqi A ; Moyer BE ; Redfern MS
• Description:
  Available coefficient of friction (ACOF) is a common metric of footwear traction performance. ACOF is the ratio of friction to normal force, often averaged over a time-interval. The time-interval needed to achieve repeatable and valid ACOF is unknown. A post-hoc analysis was performed on nine shoe-floor-contaminant combinations to assess the repeatability and bias of data averaged across 4 time-intervals (2 ms, 50 ms, 100 ms, 200 ms) after the target normal force was reached. The ability to predict human slips was assessed for ACOF across these intervals. Differences in repeatability and validity across the four intervals were small. However, statistically significant differences were observed for the shortest compared with the longest interval (lower repeatability yet modestly improved predictive ability). Given the limited impact of time-interval on the results, a shorter interval of 50 ms is recommended to enable testing of smaller floor samples. [Description provided by NIOSH]
• Subjects:
  Accidental Falls Accidents Biomechanical Phenomena Occupational Health Safety
• Keywords:
  Author Keywords: Slips, Trips, And Falls Biomechanics Floors Footwear Shoe Traction Slips, Trips, And Falls STF Tribometers Walking Surfaces
• ISSN:
  0003-6870
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  82
• NIOSHTIC Number:
  nn:20058185
• Citation:
  Appl Ergon 2020 Jan; 82:102959
• Contact Point Address:
  Kurt E. Beschorner, 306 Schenley Place, 4420 Bayard Street, Pittsburgh, PA, 15213, United States
• Email:
  beschorn@pitt.edu
• Federal Fiscal Year:
  2020
• Performing Organization:
  University of Pittsburgh
• Peer Reviewed:
  True
• Start Date:
  20020801
• Source Full Name:
  Applied Ergonomics
• End Date:
  20110831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9f34b3dbab1dbd17770174c5c397dbc7606fc1c81d6b3ac69b626029d546762d6276f27a6b40f19e3d56ed9ba654a53c7bcc87b0424e0ec2f5ea4e674dedd288
• Download URL:
  https://stacks.cdc.gov/view/cdc/221321/cdc_221321_DS1.pdf
• File Type:
  [PDF - 969.38 KB ]