Estimation and interpretation of the intra-granular stress and strain evolution in a uniaxially loaded silica sample using scanning x-ray diffraction
(2022) In TFHF-5000 FHLM01 20221Solid Mechanics
Department of Construction Sciences
- Abstract
- The intra-granular stress and strain evolution of 12 quasi-spherical silica grains, subject to uniaxial loading, has been investigated by analysis of scanning x-ray diffraction data collected at the ID11 ESRF synchrotron beamline. By applying the methods described by Henningsson et al. [1], the intra-granular strains were reconstructed and converted into stresses using an anisotropic linear-elastic material model. Integration of the resulting stress field in planes perpendicular to the loading axis reveals force transfer to the cylinder that surrounds the sample, through frictional contacts. The reconstructed stress fields are compared to results from a simple finite-element
model, and an interpretation of the intra-granular principal... (More) - The intra-granular stress and strain evolution of 12 quasi-spherical silica grains, subject to uniaxial loading, has been investigated by analysis of scanning x-ray diffraction data collected at the ID11 ESRF synchrotron beamline. By applying the methods described by Henningsson et al. [1], the intra-granular strains were reconstructed and converted into stresses using an anisotropic linear-elastic material model. Integration of the resulting stress field in planes perpendicular to the loading axis reveals force transfer to the cylinder that surrounds the sample, through frictional contacts. The reconstructed stress fields are compared to results from a simple finite-element
model, and an interpretation of the intra-granular principal stress distribution is suggested. The role of the principal stresses and the strain energy density for predicting grain failure and force transfer is investigated. It is found that there exists regions inside the grains where the strain energy density is increased. It is suggested that these intra-granular regions of locally increased strain energy density are important for the formation of fractures. Furthermore, analysis of the principal stress distribution inside the loaded grains suggest that the largest principal stress aligns perpendicular to fracture surfaces at the onset of yielding. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9094871
- author
- Vestin, Philip LU
- supervisor
-
- Stephen Hall LU
- Axel Henningsson LU
- organization
- course
- FHLM01 20221
- year
- 2022
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- s3DXRD, quartz, intra-granular, strain energy, fracture
- publication/series
- TFHF-5000
- report number
- TFHF-5252
- language
- English
- id
- 9094871
- date added to LUP
- 2022-07-01 12:48:03
- date last changed
- 2022-07-26 09:19:36
@misc{9094871, abstract = {{The intra-granular stress and strain evolution of 12 quasi-spherical silica grains, subject to uniaxial loading, has been investigated by analysis of scanning x-ray diffraction data collected at the ID11 ESRF synchrotron beamline. By applying the methods described by Henningsson et al. [1], the intra-granular strains were reconstructed and converted into stresses using an anisotropic linear-elastic material model. Integration of the resulting stress field in planes perpendicular to the loading axis reveals force transfer to the cylinder that surrounds the sample, through frictional contacts. The reconstructed stress fields are compared to results from a simple finite-element model, and an interpretation of the intra-granular principal stress distribution is suggested. The role of the principal stresses and the strain energy density for predicting grain failure and force transfer is investigated. It is found that there exists regions inside the grains where the strain energy density is increased. It is suggested that these intra-granular regions of locally increased strain energy density are important for the formation of fractures. Furthermore, analysis of the principal stress distribution inside the loaded grains suggest that the largest principal stress aligns perpendicular to fracture surfaces at the onset of yielding.}}, author = {{Vestin, Philip}}, language = {{eng}}, note = {{Student Paper}}, series = {{TFHF-5000}}, title = {{Estimation and interpretation of the intra-granular stress and strain evolution in a uniaxially loaded silica sample using scanning x-ray diffraction}}, year = {{2022}}, }