The change of hydraulic rescue tool's performance depending on the temperature of the tested materials

Abstract

According to the hypothesis the rescue process can be accelerated by local cooling of the damaged steel elements. To investigate this, the author examined the behavior of steel profile materials cooled with carbon dioxide snow and liquefied nitrogen in a series of experiments. For these he used a hydraulic cutter, steel profiles of various sizes and materials, and a digital manometer combined with a flow meter. He recorded the pressures at which the cutter cut through room temperature and chilled steel. Based on the results he proposed new procedures that can bein case of some another experiments positive results are given in the industry and in vehicle extrication situations as well.