Industry Updates
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Industry Updates
Published online: 2 February 2008 ASM International 2008
Fatigue Prediction Tool Adopted by ASME Boiler and Pressure Vessel Code When the American Society of Mechanical Engineers (ASME) publishes the latest version of the ASME Boiler and Pressure Vessel Codes, it will signify a monumental breakthrough in how industry addresses weld fatigue. It also marks a crowning achievement for Battelle scientist Dr. Pingsha Dong. Section VIII, Division 2 of the Code will now include Battelle’s Mesh-Insensitive Structural Stress method as an alternative means for predicting fatigue and fatigue life. The method is also known as the master S-N curve method, signifying its ability to correlate a massive amount of actual fatigue test data in a single S-N curve. The Verity method is implemented in fe-Safe—a leading fatigue software package distributed by U.K.-based Safe Technology Ltd. Because Dong’s mesh-insensitive structural stress method provides a level of predictability never before seen and can be easily applied, it was originally viewed as too good to be true. After years of rigorous testing through a Joint Industry Project that has applied Verity in a series of complex scenarios, Verity was proven to be a more reliable method of predicting the point at which a weld would fail than any previous technology. ‘‘There are two aspects of Battelle’s method that make it such a monumental achievement for industry,’’ said David Osage, President and CEO of The Equity Engineering Group Inc. and lead consultant in the re-write of Section VIII, Division 2 Code. ‘‘First, we have never been able to achieve the consistent and accurate results that this method provides and secondly, and maybe equally important, is that it is very easy to apply and can be incorporated seamlessly into current codes and standards.’’
For more information: Battelle Memorial Institute, 505 King Avenue, Columbus, OH 43201; tel: 800-201-2011 or 614-424-5853; web: www.battelle.org.
GE Honda Aero Engines Begins Full Engine Testing of HF120 GE Honda Aero Engines has begun testing the first full HF120 demonstration engine (including maximum thrust levels) at Honda’s Aircraft Engine R&D Center in Japan. The GE Honda HF120 engine was formally launched in October 2006 when it was selected to power both the HondaJet advanced light jet and the Spectrum Aeronautical ‘‘Freedom’’ business jet. HF120 certification is targeted for 2009, with entry into service on both aircraft scheduled to begin in 2010.
The GE Honda HF120 full demonstrator engine with funnel
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J Fail. Anal. and Preven. (2008) 8:151–155
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A wide chord, compound-swept front fan and two-stage booster that are GE Honda blisk designs with the latest 3D aerodynamic design—the same technology used to design GE’s GEnx engines and Honda’s Formula One experience for lower weight and efficiency. The outlet guide vanes are composite for weight reduction. The compressor features a high-temperature, titanium impeller developed by Honda over the past 20
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