2026-06-27T23:16:39Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/361902024-07-09T15:38:13Zcom_20.500.14352_14col_20.500.14352_20
Docta Complutense
author
Carpio Rodríguez, Ana María
2023-06-19T16:05:00Z
2023-06-19T16:05:00Z
2013-06
https://hdl.handle.net/20.500.14352/36190
Indentation tests are used to explore incipient plasticity in crystals. The tip of scanning tunneling microscopes (STM) or atomic force microscopes (AFM) are used as indenters.
Different types of dislocation patterns are observed around the indentation marks. We develop a toy model of dislocation nucleation in two dimensional indentation tests which explains dislocation formation in terms of bifurcations. A similar phenomenon is observed in homogeneous nucleation tests. Dislocation motion after nucleation is related to depinning phenomena and formation of travelling waves. Three dimensional discrete elasticity models provide a framework to simulate dislocations nucleation and motion using adequate nonreflecting boundary conditions at artificial boundaries. Once large numbers of dislocations are created continuum models allow us to understand their interaction.
eng
Pattern formation in indentation tests
conference paper
URL
https://docta.ucm.es/bitstreams/ed4832fb-55c6-4bdf-988d-4a811cf0fa2d/download
File
MD5
2d58773ca649ebca2b34f9a718a51de6
60531
application/pdf
abstract SIAM12_eprints.pdf
URL
https://docta.ucm.es/bitstreams/6dbceabf-235b-4835-ab19-56eb97762aa7/download
File
MD5
686bc6d4121565079caf45172cc2070f
3043
text/plain
abstract SIAM12_eprints.pdf.txt