Cartilage injury by ramp compression near the gel diffusion rate
نویسندگان
چکیده
منابع مشابه
Micromechanical Factors in Cartilage Injury under Ramp Compression of Explants for Deformations Applied near the "gel Diffusion" Rate
Introduction: Nonphysiologic mechanical loading of articular cartilage, as can arise in obesity or traumatic injury, may be a contributing factor in the development of degenerative diseases of cartilage. Previous investigations [1] have suggested that relatively rapid (strain rate ~0.5 s) and very slow (strain rate ~0.00005 s) ramp loads applied to osteochondral explants can give rise to differ...
متن کاملRamp-Rate Effects on Transient Enhanced Diffusion and Dopant Activation
Use of high ramp rates ~.400°C/s! in rapid thermal annealing after ion implantation leads to experimentally observed improvements in junction depth and the reverse narrow-channel effect. However, a straightforward explanation for this effect has been lacking. Via modeling, we find that increasing the heating rate permits clusters with dissociation energies lower than the maximum of 3.5-3.7 eV t...
متن کاملNonlinear analysis of cartilage in unconfined ramp compression using a fibril reinforced poroelastic model.
OBJECTIVE To develop a biomechanical model for cartilage which is capable of capturing experimentally observed nonlinear behaviours of cartilage and to investigate effects of collagen fibril reinforcement in cartilage. DESIGN A sequence of 10 or 20 steps of ramp compression/relaxation applied to cartilage disks in uniaxial unconfined geometry is simulated for comparison with experimental data...
متن کاملStrain-rate dependent stiffness of articular cartilage in unconfined compression.
The stiffness of articular cartilage is a nonlinear function of the strain amplitude and strain rate as well as the loading history, as a consequence of the flow of interstitial water and the stiffening of the collagen fibril network. This paper presents a full investigation of the interplay between the fluid kinetics and fibril stiffening of unconfined cartilage disks by analyzing over 200 cas...
متن کاملInstability of supersonic compression ramp flow.
The instability of supersonic compression ramp flow is investigated. It is assumed that the Reynolds number is large and that the governing equations are the unsteady triple-deck equations. The mean flow is first calculated by solving the steady equations for various scaled ramp angles α, and the numerical results suggest that there is no singularity for increasing ramp angles. The stability of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Orthopaedic Research
سال: 2004
ISSN: 0736-0266,1554-527X
DOI: 10.1016/s0736-0266(03)00164-5