An Approach to Characterize the Thermal Deformation of Flame-resistant Fabric Exposed to Flash Fire

摘要

The flame-resistant fabric is prone to shrink under the flash fire, resulting in the surface changes of the fabric. In this research, the surface morphology of flame-resistant fabric after combustion was analyzed. Based on a handy laser scanner, the 3D point cloud data of the fabric surface was acquired. Through analyzing the height variation of fabric surface and calculating the slope of the wrinkle, the morphology change of the fabric surface was obtained. According to this method, the surface deformation of three aramid fabrics after 4 s exposure to the flash fire was compared. The results show that this method is effective to evaluate the bulging height, wrinkle and shrink deformation of flame-resistant fabric after exposure.