液压鼓胀试验技术和小冲孔试验技术对比研究

The small punch test (SPT) and the hydraulic bulge test(HBT)are systematically compared, the advantages and disadvantages of each test technique are contrasted by comparing the test device, the sample form, test principle, test procedure, strength caculation method and application field. The device of SPT is simple and easy to operate, but there are many influence factors in the process of SPT, the force analysis of material performance is complex, there are too many variables in the calculation result.HBT is based on the SPT and draw lessons from the principle of rupture disc, the equipment of it has high requirements, but the force is relatively simple and easy to establish the theoretical model. Different loading mechanisms lead to different sample rupture positions. Both of them can be correlated with conventional mechanical tests, but HBT has semi theoretical analytical solutions based on theoretical models and is more accurate.