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Peer-reviewedCC BYJournal of the mechanical behavior of biomedical materials

Multiscale nanoindentation modelling of newborn piglet cortical bone

  • M. Yetna N'Jock
  • D. Chicot
  • B. Guelorget
  • M. Barati
  • F. Velard
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Abstract

This study presents an integrated experimental-numerical framework for the multiscale mechanical characterization of dehydrated newborn piglet cortical bone. A self-calibrated nanoindentation methodology, coupled with inverse finite element identification based on the Johnson-Cook constitutive model, is introduced to quantify both surface and bulk mechanical properties. Particular attention is given to indentation size effects and preliminary sex-related trends in mechanical response. The proposed framework enables robust estimation of elastoplastic parameters and highlights the presence of a mechanically modified surface layer whose properties differ from those of the bone core, potentially due to local preparation effects, dehydration, or microstructural heterogeneity. The proposed methodology provides new insight into the structure-property relationships governing neonatal cortical bone mechanics and may support future predictive models for fracture assessment and biomaterial design.

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Cite

BibTeXRIS
BibTeX
@article{njock2026multiscale,
  title = {{Multiscale nanoindentation modelling of newborn piglet cortical bone}},
  author = {M. Yetna N'Jock and D. Chicot and B. Guelorget and M. Barati and F. Velard},
  journal = {Journal of the mechanical behavior of biomedical materials},
  year = {2026},
  month = sep,
  doi = {10.1016/j.jmbbm.2026.107560},
  url = {https://hal.science/hal-05761140v1},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Multiscale nanoindentation modelling of newborn piglet cortical bone
AU  - M. Yetna N'Jock
AU  - D. Chicot
AU  - B. Guelorget
AU  - M. Barati
AU  - F. Velard
PY  - 2026
DA  - 2026/09/23
JO  - Journal of the mechanical behavior of biomedical materials
DO  - 10.1016/j.jmbbm.2026.107560
UR  - https://hal.science/hal-05761140v1
AB  - This study presents an integrated experimental-numerical framework for the multiscale mechanical characterization of dehydrated newborn piglet cortical bone. A self-calibrated nanoindentation methodology, coupled with inverse finite element identification based on the Johnson-Cook constitutive model, is introduced to quantify both surface and bulk mechanical properties. Particular attention is given to indentation size effects and preliminary sex-related trends in mechanical response. The proposed framework enables robust estimation of elastoplastic parameters and highlights the presence of a mechanically modified surface layer whose properties differ from those of the bone core, potentially due to local preparation effects, dehydration, or microstructural heterogeneity. The proposed methodology provides new insight into the structure-property relationships governing neonatal cortical bone mechanics and may support future predictive models for fracture assessment and biomaterial design.
SN  - 1751-6161
SN  - 1878-0180
ER  -