Affiliations: National Institute for Occupational Safety and Health, Morgantown, WV, USA | Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA | Atlas Copco Tools, Tooltec Division, Stockholm, Sweden
Note: [] Address for correspondence: John Z. Wu, PhD, 1095 Willowdale Road, MS L-2027, Morgantown, WV 26505, USA. Tel.: +1 304 285 5832; Fax: +1 304 285 6265; E-mail: jwu@cdc.gov.
Abstract: Gloves with anti-vibration features are increasingly used to reduce impact vibrations or shocks transmitted to the hands of power tool operators. Selection and evaluation of the glove materials are important steps in the designs of such gloves. In the current study, we proposed an approach to objectively evaluate the effectiveness of the glove materials using a rat-tail impact model. As a critical part of a systematic investigation, we examined the vibration reduction characteristics of typical resilient glove materials (air bladders and viscoelastic gels) and the impact vibrations transmitted to the rat tail. A special test platform that mimics impact tool vibrations was constructed and used in the experiment. A scanning laser vibrometer was used to measure the vibration at points across the platform surface under several different test conditions. The peak acceleration was found to be greatly attenuated by the glove materials, especially by using strips from a gel-filled glove. The rat tail was found to effectively absorb the high-frequency vibration. However, the glove materials and the rat tail did not reduce the frequency-weighted acceleration. The implications of the experimental results are discussed.
