The Bell test method has been modified through designing automatic notching device and bending device.By doing so the quality of the notch has been improved significantly and the variation of the testing results has been reduced.The modified test method has been applied to investigate the ESC behavior of high density polyethylene.The results show that the failure time is affected by the solvent concentration,notch offset distance,notch inclination angle and blade thickness.Furthermore,it is observed that the crack initiation occurs neither in the middle position nor at the edge of the notch,but at a position about 6.38 mm from the edge of the notch.
关键词
Bell实验法/环境应力开裂/测试装置
Key words
Bell test method/environmental stress cracking(ESC)/testing device
维普
万方数据