Estimation of conditions evoking fracture in finger bones under pinch loading based on finite element analysis.
A finger finite element (FE) model was created from CT images of a Japanese male in order to obtain a shape-biofidelic model. Material properties and articulation characteristics of the model were taken from the literature. To predict bone fracture and realistically represent the fracture pattern under various loading conditions, the ESI-Wilkins-Kamoulakos rupture model in PAM-CRASH (ESI Group S.A., Paris, France) was utilized in this study with parameter values of the rupture model determined by compression testing and simulation of porcine fibula. A finger pinch simulation was then conducted to validate the finger FE model. The force-displacement curve and fracture load from the pinch simulation was compared to the result of finger pinch test using cadavers. Simulation results are coincident with the test result, indicating that the finger FE model can be used in an analysis of finger bone fracture during pinch accident. With this model, several pinch simulations were conducted with different pinching object's stiffness and pinching energy. Conditions for evoking finger bone fracture under pinch loading were then estimated based on these results. This study offers a novel method to predict possible hazards of manufactured goods during the design process, thus finger injury due to pinch loading can be avoided.
a Department of Mechanical and Production Engineering , Niigata University , Niigata , Japan.
Jonas A
JA
Pramudita
b Department of Mechanical and Environmental Informatics , Tokyo Institute of Technology , Tokyo , Japan.
Seiji
S
Kamiya
b Department of Mechanical and Environmental Informatics , Tokyo Institute of Technology , Tokyo , Japan.|c Nippon Bunri University , Oita , Japan.
Sadayuki
S
Ujihashi
d Department of Mechanical System Design Engineering , HongIk University , Seoul , Korea.
Hyung-Yun
HY
Choi
e Analysis Center , Panasonic Corporation , Osaka , Japan.
Masato
M
Ito
e Analysis Center , Panasonic Corporation , Osaka , Japan.
Ryoji
R
Watanabe
f Center for Applied Biomechanics , University of Virginia , Charlottesville , VA , USA.
Jeff R
JR
Crandall
f Center for Applied Biomechanics , University of Virginia , Charlottesville , VA , USA.
Richard W
RW
Kent
D000818:Animals; D002102:Cadaver; D050278:Finger Phalanges / Q000000981:diagnostic imaging* / Q000293:injuries*; D020342:Finite Element Analysis; D050723:Fractures, Bone / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008297:Male; D008954:Models, Biological; D015203:Reproducibility of Results; D013552:Swine
EWK rupture model; Injury biomechanics; bone fracture; finger pinch; finite element simulation