Accuracy of finite element predictions in sideways load configurations for the proximal human femur
Grassi, Lorenzo LU
; Schileo, Enrico
; Taddei, Fulvia
; Zani, Lorenzo
; Juszczyk, Mateusz
; Cristofolini, Luca
and Viceconti, Marco
(2012)
In Journal of Biomechanics
45(2).
p.394-399
- Abstract
- Abstract in Undetermined
Subject-specific finite element models have been used to predict stress-state and fracture risk in individual patients. While many studies analysed quasi-axial loading configurations, only few works simulated sideways load configurations, such as those arising in a fall. The majority among these latter directly predicted bone strength, without assessing elastic strain prediction accuracy. The aim of the present work was to evaluate if a subject-specific finite element modelling technique from CT data that accurately predicted strains in quasi-axial loading configurations is suitable to accurately predict strains also when applying low magnitude loads in sideways configurations. To this aim, a combined... (More) - Abstract in Undetermined
Subject-specific finite element models have been used to predict stress-state and fracture risk in individual patients. While many studies analysed quasi-axial loading configurations, only few works simulated sideways load configurations, such as those arising in a fall. The majority among these latter directly predicted bone strength, without assessing elastic strain prediction accuracy. The aim of the present work was to evaluate if a subject-specific finite element modelling technique from CT data that accurately predicted strains in quasi-axial loading configurations is suitable to accurately predict strains also when applying low magnitude loads in sideways configurations. To this aim, a combined numerical–experimental study was performed to compare finite element predicted strains with strain-gauge measurements from three cadaver proximal femurs instrumented with sixteen strain rosettes and tested non-destructively under twelve loading configurations, spanning a wide cone (0–30° for both adduction and internal rotation angles) of sideways fall scenarios. The results of the present study evidenced a satisfactory agreement between experimentally measured and predicted strains (R2 greater than 0.9, RMSE% lower than 10%) and displacements. The achieved strain prediction accuracy is comparable to those obtained in state of the art studies in quasi-axial loading configurations. Still, the presence of the highest strain prediction errors (around 30%) in the lateral neck aspect would deserve attention in future studies targeting bone failure. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2298311
- author
- Grassi, Lorenzo
LU
; Schileo, Enrico
; Taddei, Fulvia
; Zani, Lorenzo
; Juszczyk, Mateusz
; Cristofolini, Luca
and Viceconti, Marco
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Finite element, Sideways fall, Human femur, Experimental validation
- in
- Journal of Biomechanics
- volume
- 45
- issue
- 2
- pages
- 394 - 399
- publisher
- Elsevier
- external identifiers
-
- scopus:84455208194
- ISSN
- 1873-2380
- language
- English
- LU publication?
- no
- id
- fdbc63c7-ec45-4dd3-b456-d7b6fcea3839 (old id 2298311)
- alternative location
- http://www.sciencedirect.com/science/article/pii/S0021929011006531
- date added to LUP
- 2016-04-04 11:21:58
- date last changed
- 2022-04-24 00:30:14
@article{fdbc63c7-ec45-4dd3-b456-d7b6fcea3839,
abstract = {{Abstract in Undetermined<br/>Subject-specific finite element models have been used to predict stress-state and fracture risk in individual patients. While many studies analysed quasi-axial loading configurations, only few works simulated sideways load configurations, such as those arising in a fall. The majority among these latter directly predicted bone strength, without assessing elastic strain prediction accuracy. The aim of the present work was to evaluate if a subject-specific finite element modelling technique from CT data that accurately predicted strains in quasi-axial loading configurations is suitable to accurately predict strains also when applying low magnitude loads in sideways configurations. To this aim, a combined numerical–experimental study was performed to compare finite element predicted strains with strain-gauge measurements from three cadaver proximal femurs instrumented with sixteen strain rosettes and tested non-destructively under twelve loading configurations, spanning a wide cone (0–30° for both adduction and internal rotation angles) of sideways fall scenarios. The results of the present study evidenced a satisfactory agreement between experimentally measured and predicted strains (R2 greater than 0.9, RMSE% lower than 10%) and displacements. The achieved strain prediction accuracy is comparable to those obtained in state of the art studies in quasi-axial loading configurations. Still, the presence of the highest strain prediction errors (around 30%) in the lateral neck aspect would deserve attention in future studies targeting bone failure.}},
author = {{Grassi, Lorenzo and Schileo, Enrico and Taddei, Fulvia and Zani, Lorenzo and Juszczyk, Mateusz and Cristofolini, Luca and Viceconti, Marco}},
issn = {{1873-2380}},
keywords = {{Finite element; Sideways fall; Human femur; Experimental validation}},
language = {{eng}},
number = {{2}},
pages = {{394--399}},
publisher = {{Elsevier}},
series = {{Journal of Biomechanics}},
title = {{Accuracy of finite element predictions in sideways load configurations for the proximal human femur}},
url = {{http://www.sciencedirect.com/science/article/pii/S0021929011006531}},
volume = {{45}},
year = {{2012}},
}