Vorrichtung und Verfahren für das Untersuchen von rohrförmigen Teilen

• Main Authors: WISE, JOHN THOMAS, HARTSVILLE, SOUTH CAROLINA 29550, US, GERHARDT, TERRY DALE, MADISON, WISCONSIN 53717, US, ROWLANDS, ROBERT EDWARD, MADISON, WISCONSIN 53711, US, SALIKLIS, EDMOND PAUL, LEMONT, ILLINOIS 60439, US
• Format: Patent
• Language: German
• Published: 19.09.1996
• Edition: 6
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

Apparatus and method for experimentally determining the compressive material strength of tubular products includes a housing (11) having a cylindrical cavity (12) therein, top and bottom end caps (13,14) closing opposite ends of the cavity (12), tubular bladder means (20) mounted in the cavity (12) and defining a pressure chamber (21) larger than the tubular product (T) to be tested and a fluid receiving space (22) between the bladder means (20) and the wall of the cavity (12), a plurality of small balls (32) substantially filling the pressure chamber (21) around the tubular product (T) being tested, means (27) for pumping hydraulic fluid into the fluid receiving space (22) to cause the bladder means (20) to apply pressure uniformly to said small balls (32) and thence uniformly over the external curved surface of the tubular product (T). Means are included to continuously monitor and display the magnitude of the pressure applied to the tubular specimen, and to detect and signal tube failure. Tubular specimens can be instrumented to monitor additional testing characteristics. The tubes can be inserted into or removed from the apparatus, as can the balls, without disrupting the hydraulic seal. Tubes of varying dimensions, geometry and material can be tested in the same fixture.