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Using a Virtual Laboratory to plan, execute and analyse Neutron Strain Scanning experiments.

Using a Virtual Laboratory to plan, execute and analyse Neutron Strain Scanning experiments. John A James 1 , Javier R Santisteban 1 , Mark R Daymond 2 and Lyndon Edwards 1. 1. Dept of Materials Engineering, Open University, Milton Keynes, UK

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Using a Virtual Laboratory to plan, execute and analyse Neutron Strain Scanning experiments.

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  1. Using a Virtual Laboratory to plan, execute and analyse Neutron Strain Scanning experiments. John A James1, Javier R Santisteban1, Mark R Daymond2 and Lyndon Edwards1 1. Dept of Materials Engineering, Open University, Milton Keynes, UK 2. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxon, UK

  2. Neutron Strain Scanning The Gauge volume

  3. Typical samples and measurments Complete components. • Samples of Welds and fastenings. • New technologies and new materials. • Deep measurements. • Area scanning. • Dynamic stress fields; variable stress or variable temperature loading. Often measurements required deep in a sample of large size or complex geometry positioned with high accuracy

  4. Previous samples and components

  5. Cold Expanded Holes • The primary source of aircraft fatigue is at joints. • Cold expansion increases joint durability. • Quantification of the benefits of cold expansion requires accurate reliable residual stress estimation.

  6. Areas Requiring improvement for new generation of machines; • Designing Measurement plan (no support). • Executing measurement plan (command line interface). • Analysing data (only after completed run).

  7. Aims and intentions. Software to guide the experiment from planning to analysis and maximise the; “Information output per unit of beam Time”

  8. Integrated Software support. • Computer aided measurement plans. • Automated execution. • Fast data analysis to permit real time modification of measurement plan. • Powerful visualisation options. • Accessible to non-neutron specialists.

  9. Strain Scanning Simulation SoftwareSScannSS 1.) IDL (V5.6) GUI and Visualisation. 2.) Open Genie (ISIS) and GSAS; Data retrieval and (some) analysis.

  10. Progress Report. • Last Year; Basic planning/execution modules written, no experimental verification. • Current; Improvements to planning/execution modules, data analysis module written. Regular use with ENGINX. • Future; Trials with new users. Expand data visualisation module. Add other virtual Labs; Australia facility (Nov.) and ILL (2004).

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