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Fatigue Prediction Tool Adopted By ASME
September 19, 2007

When 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 and 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 ASME Boiler and Pressure Vessel Code establish construction rules for new boilers and pressure vessels, and nuclear power plant components. This code is required for use by most regulatory bodies in North America but is also broadly used internationally.

Any breakthrough of this magnitude is sure to raise eyebrows and the path to adopt Dong’s method into the codes was not easy. Since there had been little advancement in fatigue prediction and his methodology produced results that were previously thought to be impossible, many industry veterans questioned that such a solution could exist. Years of validating data and presentations to ASME’s constituency were required to turn skeptics into believers. It was this battle and the support Dong received not only from Battelle, but also members of the ASME that makes this achievement so special.

Additionally, Pingsha noted that the mesh-insensitive structural stress method is directly applicable for fatigue design and life prediction of steel bridge structures, as well as remaining life assessment for aging bridges. “Recently published full scale fatigue data for steel bridges and signal masts, funded by the DOT and various States DOTs, has been predicted by our method as stipulated in the 2007 ASME Code”.

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