PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 6830

[Constitution and structure of human tendons].

B József·J László
View original source ↗Export metadata ↓

Abstract

In this introductory study our actual knowledge on the tendons is resumed and it is pointed out that on the basis of this knowledge no explanation is given as regards the pathomechanism of the "spontaneous" tendon ruptures. The authors' concept on the tendons as motor units is discussed. The examinations are dealt with, by which the authors intend to revise the conventional static tendon model.

Explore related subjects

ElasticityHumansRupture, SpontaneousTendonsEnglish AbstractJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

B József, J László. 1976. [Constitution and structure of human tendons].. https://pubmed.ncbi.nlm.nih.gov/6830/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1992

Leukocyte deformability: finite element modeling of large viscoelastic deformation.

An axisymmetric deformation of a viscoelastic sphere bounded by a prestressed elastic thin shell in response to external pressure is studied by a finite element method. The research is motivated by the need for understanding the passive behavior of human leukocytes (white blood cells) and interpreting extensive experimental data in terms of the mechanical properties. The cell at rest is modeled as a sphere consisting of a cortical prestressed shell with incompressible Maxwell fluid interior. A large-strain deformation theory is developed based on the proposed model. General non-linear, large strain constitutive relations for the cortical shell are derived by neglecting the bending stiffness. A representation of the constitutive equations in the form of an integral of strain history for the incompressible Maxwell interior is used in the formulation of numerical scheme. A finite element program is developed, in which a sliding boundary condition is imposed on all contact surfaces. The mathematical model developed is applied to evaluate experimental data of pipette tests and observations of blood flow.

Elasticity↗
PubMed1992

The elastic deformability of closed multilayered membranes is the same as that of a bilayer membrane.

The elastic behavior of closed multilayered membranes is analyzed with the assumption that the constituent layers are in close contact but are unconnected in the sense that they are free to slide by one another. The system exhibits three independent elastic deformation modes for any number of the constituent layers equal to or larger than two. These are the area expansivity of the membrane neutral surface, and the local and non-local membrane bending. The corresponding elastic moduli are expressed in terms of the elastic moduli of the constituent layers, their areas, and distances between their neutral surfaces. Closed multilayered membranes only differ from a closed bilayer membrane in that for any of their shapes some of the constituent layers are expanded and some compressed.

Elasticity↗
PubMed1992

Characterization of surgical suture materials using dynamic mechanical analysis.

Dynamic mechanical analysis (DMA) has been used to characterize the viscoelastic properties of four suture materials, Prolene, Maxon, Vicryl and silk. The technique identified the main transitions for the sutures and frequency multiplexing was used to define the variation of modulus with time. The monofilament Prolene has a beta transition and the monofilament Maxon has an alpha transition close to room temperature, indicating that both materials exhibit a change in stiffness with time. The alpha transitions (Tgs) of silk and Vicryl occur at temperatures significantly above room temperature and frequency multiplexing data indicate that both materials exhibit stable moduli with respect to time at room temperature. Determination of the viscoelastic behaviour through DMS appears to be very useful in predicting the performance of suture materials.

Elasticity↗