scholarly journals The Mechanical Properties of Rat Tail Tendon

1959 ◽  
Vol 43 (2) ◽  
pp. 265-283 ◽  
Author(s):  
Bernard J. Rigby ◽  
Nishio Hirai ◽  
John D. Spikes ◽  
Henry Eyring
Keyword(s):  
Mechanical Properties ◽  
Simple Model ◽  
Stress Relaxation ◽  
Connective Tissue ◽  
Mechanical Behavior ◽  
Biological Significance ◽  
Connective Tissue Disorders ◽  
Stress Relaxation Behavior ◽  
Tail Tendon ◽  
Rat Tail

The load-strain and stress-relaxation behavior of wet rat tail tendon has been examined with respect to the parameters strain, rate of straining, and temperature. It is found that this mechanical behavior is reproducible after resting the tendon for a few minutes after each extension so long as the strain does not exceed about 4 per cent. If this strain is exceeded, the tendon becomes progressively easier to extend but its length still returns to the original value after each extension. Extensions of over 35 per cent can be reached in this way. Temperature has no effect upon the mechanical behavior over the range 0–37°C. Just above this temperature, important changes take place in the mechanical properties of the tendon which may have biological significance. The application of the techniques used here to studies of connective tissue disorders is suggested. Some of the mechanical properties of tendon have been interpreted with a simple model.

On mechanical models for tendon: addendum and corrigendum

1981 ◽  
Vol 211 (1184) ◽  
pp. 391-392 ◽  
Keyword(s):  
Mechanical Properties ◽  
Deformation Behaviour ◽  
Mechanical Deformation ◽  
Load Bearing ◽  
Mechanical Models ◽  
Tail Tendon ◽  
Bearing Structure ◽  
Published Paper ◽  
Rat Tail ◽  
Western Reserve

The purpose of this note is to comment on some models for the mechanical properties of tendon and to draw attention to a misprint in an earlier paper, Diamant et al , (1972), to which we were contributors. In the study published in 1972 we and our coauthors at Case Western Reserve University, Cleveland, Ohio, presented optical and mechanical evidence for a planar zig-zag model of the basic load-bearing structure in rat-tail tendon interpreting the mechanical deformation by the theory of the extensible elastica. Because of an unfortunate misprint in the published paper, the validity of the elastica model has been called into question, and other theories explaining the load deformation behaviour of tendon have been proposed (Lanir 1978; Comninou & Yannas 1976).

Mechanical properties of collagen fibres: a comparison of reconstituted and rat tail tendon fibres

Biomaterials ◽  
1989 ◽  
Vol 10 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Y.Pedro Kato ◽  
David L. Christiansen ◽  
Rita A. Hahn ◽  
Sheu-Jane Shieh ◽  
Jack D. Goldstein ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Collagen Fibres ◽  
Tail Tendon ◽  
Rat Tail

Der Einfluß von D-Penicillamin auf den Gehalt einiger Organe an Spurenelementen sowie auf die mechanischen Eigenschaften von Kollagen / Trace Elements in Several Organs and Mechanical Properties of Collagen under the Influence of D-Penicillamin

1978 ◽  
Vol 33 (5-6) ◽  
pp. 346-358 ◽  
Author(s):  
H. Wesch ◽  
R. Jonak ◽  
H. Nemetschek-Gansler ◽  
H. Riedl ◽  
Th. Nemetschek
Keyword(s):  
Mechanical Properties ◽  
Trace Elements ◽  
Schiff Base ◽  
Connective Tissue ◽  
Functional Groups ◽  
Schiff Bases ◽  
Collagen Fibrils ◽  
Principal Effect ◽  
Tail Tendon ◽  
Cu Ions

Abstract The content of trace elements in several organs of rats under the influence of D-penicillamine (D-PA) was investigated by the neutronactivation-analysis. It could be shown an diminution of Cu, and Co under D-PA-treatment, the content of Fe, Mn, Rb and Zn was not influenced. The investigat­ ed organs didn’t show any submicroscopic alterations under D-PA. On isolated collagen fibrils of tail tendon was seen a significantly diminuition of E-moduls. In accordance with Siegel the principal effect of D-PA is thought to block the synthesis of functional groups from Schiff-base crosslink precursors but not to inhibit lysyloxidase by loss of Cu-ions of connective tissue. The thermostability of D-PA influenced fibrils is changed in stretched state only and will be due to the lack of crosslink Schiff-bases; where as the shrinking point of not stretched fibrils shows only aging dependent changes.

Age-Dependent Influence of Strain Rate on the Tensile Failure of Rat-Tail Tendon

1983 ◽  
Vol 105 (3) ◽  
pp. 296-299 ◽  
Author(s):  
R. C. Haut
Keyword(s):  
Tensile Strength ◽  
Energy Density ◽  
Connective Tissue ◽  
Strain Rate ◽  
Failure Strain ◽  
Tensile Failure ◽  
Strength Failure ◽  
Age Dependent ◽  
Tail Tendon ◽  
Rat Tail

Sensitivity of tensile strength, failure strain, and failure energy density to strain rate was studied for rat-tail tendon (RTT), a collagen-rich connective tissue. Tendons from animals aged 1–27 months were stretched at a high (720 percent/s) and low (3.6 percent/s) strain rate. Each failure parameter increased with strain rate. However, the sensitivity of tendon failure to rate of strain decreased rapidly during growth and sexual maturation of the animal. The study provides basic data on the rate-sensitive strength of collagen fibers using RTT.

scholarly journals Time-Dependent Mechanical Properties in Polyetherimide 3D-Printed Parts Are Dictated by Isotropic Performance Being Accurately Predicted by the Generalized Time Hardening Model

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 678 ◽  
Author(s):  
A. G. Salazar-Martín ◽  
A. A. García-Granada ◽  
G. Reyes ◽  
G. Gomez-Gras ◽  
J. M. Puigoriol-Forcada
Keyword(s):  
Mechanical Properties ◽  
Stress Relaxation ◽  
Relaxation Behavior ◽  
Time Dependent ◽  
Secondary Creep ◽  
Stress Relaxation Behavior ◽  
Build Orientation ◽  
Fused Deposition ◽  
3D Printed ◽  
Generalized Time

The Fused-Deposition Modelling (FDM) technique has transformed the manufacturing discipline by simplifying operational processes and costs associated with conventional technologies, with polymeric materials being indispensable for the development of this technology. A lack of quantification of viscoelastic/plastic behavior has been noted when addressing FDM parts with Polyetherimide (PEI), which is currently being investigated as a potential material to produce functional end-products for the aerospace and health industry. Primary and secondary creep along with stress relaxation tests have been conducted on FDM PEI specimens by applying stresses from 10 to 40 MPa for 100 to 1000 min. Specimens were 3D printed by varying the part build orientation, namely XY, YZ, and XZ. Creep results were fitted to the Generalized Time Hardening equation (GTH), and then this model was used to predict stress relaxation behavior. FDM PEI parts presented an isotropic creep and stress relaxation performance. The GTH model was proven to have a significant capacity to fit viscoelastic/plastic performances for each single build orientation (r > 0.907, p < 0.001), as well as a tight prediction of the stress relaxation behavior (r > 0.998, p < 0.001). Averaged-orientation coefficients for GTH were also closely correlated with experimental creep data (r > 0.958, p < 0.001) and relaxation results data (r > 0.999, p < 0.001). FDM PEI parts showed an isotropic time-dependent behavior, which contrasts with previous publications arguing the significant effect of part build orientation on the mechanical properties of FDM parts. These findings are strengthened by the high correlation obtained between the experimental data and the averaged-coefficient GTH model, which has been proven to be a reliable tool to predict time-dependent performance in FDM parts.

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