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Extracting accurate strain measurements in bone mechanics: A critical review of current methods

Grassi, Lorenzo LU and Isaksson, Hanna LU (2015) In Journal of the Mechanical Behavior of Biomedical Materials 50. p.43-54
Abstract
Osteoporosis related fractures are a social burden that advocates for more accurate fracture prediction methods. Mechanistic methods, e.g. finite element models, have been proposed as a tool to better predict bone mechanical behaviour and strength. However, there is little consensus about the optimal constitutive law to describe bone as a material. Extracting reliable and relevant strain data from experimental tests is of fundamental importance to better understand bone mechanical properties, and to validate numerical models.



Several techniques have been used to measure strain in experimental mechanics, with substantial differences in terms of accuracy, precision, time- and length-scale. Each technique presents upsides... (More)
Osteoporosis related fractures are a social burden that advocates for more accurate fracture prediction methods. Mechanistic methods, e.g. finite element models, have been proposed as a tool to better predict bone mechanical behaviour and strength. However, there is little consensus about the optimal constitutive law to describe bone as a material. Extracting reliable and relevant strain data from experimental tests is of fundamental importance to better understand bone mechanical properties, and to validate numerical models.



Several techniques have been used to measure strain in experimental mechanics, with substantial differences in terms of accuracy, precision, time- and length-scale. Each technique presents upsides and downsides that must be carefully evaluated when designing the experiment. Moreover, additional complexities are often encountered when applying such strain measurement techniques to bone, due to its complex composite structure.



This review of literature examined the four most commonly adopted methods for strain measurements (strain gauges, fibre Bragg grating sensors, digital image correlation, and digital volume correlation), with a focus on studies with bone as a substrate material, at the organ and tissue level. For each of them the working principles, a summary of the main applications to bone mechanics at the organ- and tissue-level, and a list of pros and cons are provided. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Digital volume correlation, Digital image correlation, Fibre Bragg grating, Strain gages, Strain gauges, Validation, Femur, Bone mechanics, Strain
in
Journal of the Mechanical Behavior of Biomedical Materials
volume
50
pages
43 - 54
publisher
Elsevier
external identifiers
  • pmid:26099201
  • wos:000361775000005
  • scopus:84937604500
ISSN
1751-6161
DOI
10.1016/j.jmbbm.2015.06.006
language
English
LU publication?
yes
id
9327d559-f9e6-41cf-b07d-cac43d3a5d60 (old id 7357064)
date added to LUP
2015-06-16 12:14:08
date last changed
2017-10-01 03:04:58
@article{9327d559-f9e6-41cf-b07d-cac43d3a5d60,
  abstract     = {Osteoporosis related fractures are a social burden that advocates for more accurate fracture prediction methods. Mechanistic methods, e.g. finite element models, have been proposed as a tool to better predict bone mechanical behaviour and strength. However, there is little consensus about the optimal constitutive law to describe bone as a material. Extracting reliable and relevant strain data from experimental tests is of fundamental importance to better understand bone mechanical properties, and to validate numerical models.<br/><br>
<br/><br>
Several techniques have been used to measure strain in experimental mechanics, with substantial differences in terms of accuracy, precision, time- and length-scale. Each technique presents upsides and downsides that must be carefully evaluated when designing the experiment. Moreover, additional complexities are often encountered when applying such strain measurement techniques to bone, due to its complex composite structure.<br/><br>
<br/><br>
This review of literature examined the four most commonly adopted methods for strain measurements (strain gauges, fibre Bragg grating sensors, digital image correlation, and digital volume correlation), with a focus on studies with bone as a substrate material, at the organ and tissue level. For each of them the working principles, a summary of the main applications to bone mechanics at the organ- and tissue-level, and a list of pros and cons are provided.},
  author       = {Grassi, Lorenzo and Isaksson, Hanna},
  issn         = {1751-6161},
  keyword      = {Digital volume correlation,Digital image correlation,Fibre Bragg grating,Strain gages,Strain gauges,Validation,Femur,Bone mechanics,Strain},
  language     = {eng},
  pages        = {43--54},
  publisher    = {Elsevier},
  series       = {Journal of the Mechanical Behavior of Biomedical Materials},
  title        = {Extracting accurate strain measurements in bone mechanics: A critical review of current methods},
  url          = {http://dx.doi.org/10.1016/j.jmbbm.2015.06.006},
  volume       = {50},
  year         = {2015},
}