Experimental study of plastics hardness

The experimental studies on hardness of unfilled polycarbonates and also of filled polycarbonate and polyamide in lateral bending mode of the specified cyclic deformation were made. The influence of technological gap on fatigue properties error was found experimentally. There were investigated the dependence of stress on defomations when lateral bending and the possibility of describing it with linear and exponential laws. Hardness limits of plastics deformations and stresses were obtained.