MMAE Seminar - Fatigue Pressure Rating of Fluid Power Components

Armour College of Engineering's Mechanical, Materials & Aerospace Engineering Department will welcome Mr. John Berninger to campus on Thursday, March 26th to present Otto Maha Seminar, Fatigue Pressure Rating of Fluid Power Components.

Abstract

The Otto Maha seminar is a presentation in memory of the technical achievements in fluid power by Otto Maha during his lifetime. This seminar describes how fluid power components are rated for their fatigue pressure capability. When a designer proposes a rating for hydraulic cylinders on an aircraft, for example, the probability of failure from fatigue is analyzed by statistics. Then a fatigue test is conducted to verify the probability of success. This seminar will briefly describe the variability of both static and fatigue stresses; and how statistics are used to develop a test that a designer can use to verify the probability of success. A description of the fatigue properties of metals found from research testing is also described, to demonstrate how it is applied to the pressure rating method.

Biography

John Berninger is an IIT alumnus, BSME 1958; MSME 1966 and a registered professional engineer in Illinois and Michigan. He retired from Parker Hannifin in 2002 after 36 years with the company. His last position was the global engineering manager for pneumatic products. During his career, he was involved with standards development as an extra activity with his work. He served as chair of the Technical board in the National Fluid Power Association, served on the Board of standards review in the American National Standards Institute, and is currently chair of technical committee 131 for fluid power in the International Organization for Standardization – ISO. John has written many NFPA, ANSI, and ISO standards over the years; including the one for today’s discussion.