Full strain tensor measurements with X-ray diffraction and strain field mapping: a simulation study.
J Synchrotron Radiat
; 27(Pt 3): 646-652, 2020 May 01.
Article
en En
| MEDLINE
| ID: mdl-32381764
ABSTRACT
Strain tensor measurements are important for understanding elastic and plastic deformation, but full bulk strain tensor measurement techniques are still lacking, in particular for dynamic loading. Here, such a methodology is reported, combining imaging-based strain field mapping and simultaneous X-ray diffraction for four typical loading modes one-dimensional strain/stress compression/tension. Strain field mapping resolves two in-plane principal strains, and X-ray diffraction analysis yields volumetric strain, and thus the out-of-plane principal strain. This methodology is validated against direct molecular dynamics simulations on nanocrystalline tantalum. This methodology can be implemented with simultaneous X-ray diffraction and digital image correlation in synchrotron radiation or free-electron laser experiments.
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MEDLINE
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En
Revista:
J Synchrotron Radiat
Asunto de la revista:
RADIOLOGIA
Año:
2020
Tipo del documento:
Article