Quantification of nonlinear elasticity for the valuation of submillimeter crack length in cortical bone
TypeArticles dans des revues avec comité de lecture
The objective of this study was to investig ate the sensitivity of the nonlinear elastic properties of cortical bon e to the presence of a single submillime tric crac k. Nonli near elasticity was measured by nonlinear resonant ultrasound spectroscopy (NRUS) in 14 human cortical bon e specimen s. The specimen s were parallelepiped beams (50 2 2 mm3). A central notch of 500 mm was made to control crack initiation and propagation during four-point bending. The nonlinear hysteretic elastic and dissipative parameters αf and α Q, and Young's modulus Eus were measured in dry condition for undamaged (control) specimens and in dry and wet conditions for damaged specimens. The length of the crack was assessed using synchrotron radiation micro-computed tomography (SR- μCT) with a voxel size of 1.4 μm. The initial values of αf, measured on the intact specimens, were remarkably similar for all the specimens (αf ¼ 5.57 1.5). After crack propagation, the nonlinear elastic coefficient α f increased significantly (p o 0.006), with values ranging from 4.0 to –296.7. Conversely, no significant variation was observed for αQ and Eus. A more pronounced nonlinear elastic behavior was observed in hydrated specimens compared to dry specimens (p o 0.001) after propagation of a single submillimetric crack. The nonlinear elastic parameter αf was found to be significantly correlated to the crack length both in dry (R ¼0.79, p o0.01) and wet (R ¼0.84, p o0.005) conditions. Altogether these results show that nonlinear elasticity assessed by NRUS is sensitive to a single submillimetric crack induced mechanically and suggest that the humidity must be strictly controlled during measurements.
Files in this item
Showing items related by title, author, creator and subject.
HAUPERT, Sylvain; GUERARD, Sandra; MITTON, David; PEYRIN, Françoise; LAUGIER, Pascal (Acoustical Society of America, 2012)Accumulation of bone microdamage is suspected to lead to severe impairment of mechanical properties with an increase in skeletal fragility and fracture risk. The objective of the study was to evaluate the sensitivity of ...
Non Destructive Characterization of Cortical Bone MicroDamage by Nonlinear Resonant Ultrasound Spectroscopy HAUPERT, Sylvain; GUERARD, Sandra; PEYRIN, Françoise; MITTON, David; LAUGIER, Pascal (PlosOne, 2014)The objective of the study was to evaluate the ability of a nonlinear ultrasound technique, the so-called nonlinear resonant ultrasound spectroscopy (NRUS) technique, for detecting early microdamage accumulation in cortical ...
Quantitative Ultrasound of Cortical Bone in the Femoral Neck Predicts Femur Strength: Results of a Pilot Study GRIMAL, Quentin; GRONDIN, Julien; GUERARD, Sandra; BARKMANN, Reinhard; ENGELKE, Klaus; GLÜER, Claus-C; LAUGIER, Pascal (wiley, 2013)A significant risk of femoral neck (FN) fracture exists for men and women with an areal bone mineral density (aBMD) higher than the osteoporotic range, as measured with dual-energy X-ray absorptiometry (DXA). Separately ...
GUERARD, Sandra; MANASSERO, Mathieu; VIATEAU, Véronique; MIGONNEY, Véronique; SKALLI, Wafa; MITTON, David (techno-press, 2014)This study aimed to assess the biomechanical performance of a new generation of artificial ligament, which can be considered “bioactive” and “biointegrated,” implanted in sheep. Thirty sheep were implanted: 15 sheep received ...
MORESCHI, Hélène; CALLE, Samuel; GUERARD, Sandra; MITTON, David; RENAUD, Guillaume; DEFONTAINE, Marielle (sage, 2011)Dynamic acousto-elastic testing (DAET) is based on the coupling of a lowfrequency (LF) acoustic wave and high-frequency ultrasound (US) pulses (probing wave). It was developed to measure US viscoelastic and dissipative ...