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Path Dependent Maximum Range

Nov 22, 2016, 13:22 PM
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Grinding metal.
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Battelle Path-Dependent Maximum Range (PDMR)

Advanced multi-axial cycle-counting and fatigue-life assessment.

Some years ago, Battelle scientists recognized the need for a robust, efficient and physically sound multi-axial cycle-counting and fatigue-life assessment method for both welded and non-welded structures.

The solution: an innovative Battelle-developed, validated and patented methodology known as PDMR – a methodology that permits fatigue-life assessments of structures under general, variable amplitude, and multi-axial fatigue-loading histories.

Validated by pioneering experts across a broad array of industries, and adopted by Bureau Veritas as a new guide for fatigue design of off-shore structures, Battelle PDMR allows engineers to:

  • Assess fatigue lives for welded joints and structures under general, variable amplitude, and multi-axial fatigue loading history
  • Perform fatigue analysis of welded joints with complex loading histories
  • Optimize designs for applications from heavy machinery to offshore and marine use

 

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PDMR’s Key Features

Battelle PDMR is based on fracture mechanics and the critical-plane approach. This technology:

  • Allows the application of nominal, structural and local stress
  • Permits application of both nominal and local strain
  • Takes into account the effect of loading path on fatigue damage
  • Studies the duration of history without limit
  • Considers stress/strain components and implements advanced convex-hull speed-up algorithm in PDMR-2D

 

The Benefits of PDMR

Like all of Battelle’s fatigue and welding technologies, Battelle PDMR provides the capabilities required for the most challenging industrial applications. The result: improved products that can be sent to market more quickly than ever before, thanks to:

  • Accurate and consistent fatigue-life and remaining-life assessment
  • Increased understanding of product life and performance
  • Easy implementation and automation
  • Maximized fatigue performance