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Hookean materials Materials that demonstrate a linear stress–strain relationship (also called linear-elastic), therefore obeying Hooke’s law. Young’s modulus Slope of the stress–strain diagram from the origin to any point. For linear-elastic materials it is constant. Also called the constant of proportionality or modulus of elasticity.
Some materials have linear elasticity. That is, when you plot stress versus strain, you get a straight line whose slope conveys the elastic stiffness, or modulus, of the material. Like most bio logical materials, however, blood vessels exhibit nonlinear elasticity. Their elastic stiffness is not constant but increases with the magnitude of ...
26 Δεκ 2019 · Top, the typical nonlinear relation between luminal pressure and area in large elastic arteries, explained by the progressive shift in load bearing from elastin to collagen fibers. Data translate into distensibility and pulse wave velocity (PWV) with the use of the Bramwell-Hill relation.
In elastic arteries, the smooth muscles cells are arranged in medial lamellar units which are concentric layers separated by fenestrated elastic laminae, see Figure 2. Up to 60 of these...
1 Αυγ 2018 · Large, elastic arteries are composed of cells and a specialized extracellular matrix that provides reversible elasticity and strength. Elastin is the matrix protein responsible for this reversible elasticity that reduces the workload on the heart and dampens pulsatile flow in distal arteries.
Keywords: Arteries; Mechanical properties elasticity 1. Introduction It is well known that the elasticity of materials is expressed in Hooke’s law as follows: Tensile stress of a solid is proportional to the amount of deformation, provided the deformation is not permanent. Hooke’s law applied to an elastic bar of length l can be expressed ...
Conducting (elastic) arteries are the largest. Some examples are the pulmonary arteries, aorta, and common carotid arteries. Their tunica media consists of numerous sheets of elastic tissue, perforated like slices of Swiss cheese, alternating with thin layers of smooth muscle, collagen, and elastic fibers. Conducting arteries expand when the
