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