...Luke Nigro; Elisa S. Arch Natural ankle quasi-stiffness (NAS) is a mechanical property of the ankle joint during dynamic motion. NAS has been historically calculated as the average slope (linear regression) of the net ankle moment versus ankle angle during discrete phases of stance. However, recent...

... properties of the annulus. e-mail:  sino9020@mylaurier.ca 1 Corresponding author. e-mail:  dgregory@wlu.ca 28 02 2022 06 06 2022 01 07 2022 annulus fibrosus intervertebral disc biomechanics tensile properties stiffness Natural Sciences and Engineering Research...

...-mail:  john.eberth@uscmed.sc.edu e-mail:  jay.humphrey@yale.edu 17 05 2021 14 10 2021 15 12 2021 hypertension Marfan syndrome extracellular matrix remodeling stiffness phenotype National Institutes of Health 10.13039/100000002 R01 HL145064 National Science Foundation...

... SPARC-null (n = 36) and WT (n = 18) mice aged 14–25 months were subjected to cyclic axial tension and compression to determine neutral zone (NZ) length and stiffness. Three separate mechanical tests were completed for each spine to determine the effect of the number of IVDs tested in series (one versus...

... pathological development in the cells; pathological or aging cells, on the other hand, can alter their micro-environment to become abnormal. In this minireview, we discuss four important biophysical cues of the micro-environment—stiffness, curvature, extracellular matrix (ECM) architecture and viscosity...

...Alex M. Noonan; Derek P. Zwambag; Nicole Mazara; Erin Weersink; Geoffrey A. Power; Stephen H. M. Brown Studies on single muscle fiber passive material properties often report relatively large variation in elastic modulus (or normalized stiffness), and it is not clear where this variation arises...

... of the anisotropic properties of white matter. This work is in part a work of the U.S. Government. ASME disclaims all interest in the U.S. Government's contributions. e-mail:  clj@udel.edu 21 01 2019 21 01 2020 04 03 2020 magnetic resonance elastography brain stiffness...

..., HR-pQCT scans were performed on the standard scan segment, a segment distal to the standard segment, and a segment proximal to the standard segment. Whole distal radius and tibia stiffness were determined through mechanical testing. Segment bone stiffness was estimated using linear finite element (FE...

...Clare Y. L. Chao; Gabriel Y. F. Ng; Kwok-Kuen Cheung; Yong-Ping Zheng; Li-Ke Wang; Gladys L. Y. Cheing Our findings suggest that the stiffness of wound tissues measured by the air-jet system could be an indicator for monitoring wound healing and contraction. A faster rate of recovery...

... on the predictions of deformation and stiffness, and more realistic representations of the anisotropy can be advantageous. In contrast, for models of the entire vertebral body, and in the absence of specimen-specific data on the anisotropic mechanical behavior of the peripheral trabecular bone and shell, material...

... bending from 50 N to 300 N at 1 Hz for 25 cycles. All femurs were tested in both anteroposterior (AP) and mediolateral (ML) bending planes. Bending stiffness (i.e., slope of the force-vs-displacement curve) and linearity R 2 (i.e., coefficient of determination) of each loading cycle were measured...

... portion of the third cycle was used to measure the stiffness. Indentation tests were performed on two polyurethane foams and polymethyl-methacrylate for validation ( n = 15 ) . Regression analysis was used to compare the moduli with reference values. Subchondral bone moduli of tibial plateaus from Sprague...

... spinal segments (Occiput-C2, C4-C5, and C6-C7) for measurement of tensile structural response and failure testing. The upper cervical spine (Occiput-C2) was found to be significantly less stiff, absorb less strain energy, and fail at higher loads than the lower cervical spine (C4-C5 and C6-C7...

... and the force acting on the needles. This relationship allows the force on the microneedle to be determined from a known field gradient. This together with a measurement of the displacement of the needle in a given gel allows one to determine the stiffness ( F ∕ δ ) of the gel and the elastic modulus, provided...

... of mixtures for fiber composites to evaluate the dependence of age-related changes in tendon tensile strength ( σ ) and stiffness ( E ) on the collagen fibril cross-sectional area fraction ( ρ ) , which is related to the fibril volume fraction. Tail tendons from C57BL6 mice from age groups 1.6 – 35.3 months...

... rapidly decreases. The shear modulus estimates in Table 3 slightly suggest higher stiffness in the anterior section of the brain than in the posterior section analyzed. The results also suggest higher stiffness in the subcortical gray matter of the mouse brain than in the cortical gray matter...

... bone compressive strength orthopaedics tensile strength yield stress Young's modulus human cortical bone strain rate effects ductile-brittle transition stiffness strength In a failure scenario, bone will often have been exposed to high strain rates. From equine and canine studies...

... with a different constitutive relation, the graphs show the same trend in both the near uniformity of c and the changing ratio of circumferential to meridional stiffness, an indirect indication of regionally different properties. Stress-strain simulations for the Choi-Vito model based on material...

...J. A. Simo˜es; J. Monteiro; M. A. Vaz The aim of this paper is to describe a new numerical–experimental method to determine the stiffness of a conceptual proximal femoral prototype. The methodology consists of the comparison of the numerical and experimental displacement distributions...