Bending and impact fatigue testing machine for thin plates using fluid element

摘要

PURPOSE:To conduct a shock fatigue test on the test bodies of variety of shape and size by breaking a low-pressure vortex area with a control jet flow from a control duct. CONSTITUTION:When compressed air is spouted as a main jet 25 out of a main nozzle 3 into the space surrounded with a side wall 23, the low-pressure vortex area 22 is formed between the jet 25 and side wall 23 by a convolution phenomenon that the jet itself has and the jet is bent to flow sticking on one side wall like a sticking jet 24. Then this area 22 is broken with the control jet flow from a control duct 8 to move the jet to the opposite-side wall 23. This switching is performed not by switching calculation of the control jet from the duct 8, but by providing only a load capacity part 5 to both ducts 4. Thus, the shock fatigue test of the test-piece in variety of shape and size is conducted.