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Keywords: Stress Relaxation
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Journal Articles
Article Type: Research-Article
J Biomech Eng. September 2020, 142(9): 091006.
Paper No: BIO-19-1455
Published Online: April 13, 2020
... (low), 0.5/s (medium), and 1.25/s (high), ranging in the physiological loading rate of connective tissue, on the stress-relaxation response of the porcine dermis. Results show that in the initial phase of the relaxation, the value of stress relaxation (extent of relaxation) was found higher for high...
Journal Articles
Article Type: Technical Briefs
J Biomech Eng. April 2014, 136(4): 044502.
Paper No: BIO-13-1380
Published Online: March 24, 2014
... that could preserve growth plate biomechanical properties. Porcine ulnar growth plate explants (n = 5 per condition) were stored at either 4 °C for periods of 1, 2, 3, and 6 days or frozen at −20 °C with slow or rapid sample thawing. Samples were tested using stress relaxation tests under unconfined...
Journal Articles
Article Type: Research-Article
J Biomech Eng. September 2013, 135(9): 091007.
Paper No: BIO-12-1607
Published Online: July 10, 2013
... behavior characterized by an instantaneous displacement followed by a creep phase and a stress relaxation phase. Stress relaxation behavior is that which provides the long-term loading to and causes remodelling of the alveolar bone, which is responsible for the long-term permanent displacement of the tooth...
Journal Articles
Article Type: Technical Briefs
J Biomech Eng. March 2013, 135(3): 034501.
Paper No: BIO-12-1195
Published Online: February 11, 2013
...-independent mechanism may contribute at different structural levels. We hypothesized that the stress relaxation response of a single tendon fascicle is consistent with the flow-dependent mechanism described by the biphasic theory (Armstrong et al., 1984, “An Analysis of the Unconfined Compression of Articular...
Journal Articles
Article Type: Research Papers
J Biomech Eng. February 2012, 134(2): 021001.
Published Online: February 15, 2012
... material model was used for the cartilages and menisci to simulate the poromechanical, nonlinear, and anisotropic behavior of these tissues. To compare the responses of the intact and meniscectomized knees, three different loading protocols were considered: stress relaxation, simple creep, and combined...
Journal Articles
Article Type: Research Papers
J Biomech Eng. January 2012, 134(1): 011011.
Published Online: February 10, 2012
... ± 0.9 The Kelvin solid viscoelastic model was able to fit all stress-relaxation curves with a high degree of accuracy (R 2  > 0.90). Experimental results are shown in Fig. 3 and the raw data can be found in Table 1 . Regional variations in all compressive properties of the TMJ disc...
Journal Articles
Article Type: Research Papers
J Biomech Eng. September 2011, 133(9): 091007.
Published Online: October 11, 2011
... fibers were subjected to incremental stress relaxation tests to characterize the dependence of passive muscle stress on time, strain and strain rate. A model was then developed to describe fiber viscoelasticity incorporating the observed nonlinearities. The results of this model were compared with two...
Journal Articles
Article Type: Research Papers
J Biomech Eng. August 2011, 133(8): 081004.
Published Online: September 6, 2011
... strains (20%). The constitutive material parameters were determined using a coupled finite element-optimization algorithm that utilized stress relaxation indentation tests at relatively high strains. The proposed model incorporates the strain-hardening, tension-compression, permeability, and finite...
Journal Articles
Article Type: Research Papers
J Biomech Eng. July 2011, 133(7): 071009.
Published Online: July 29, 2011
...Benjamin S. Elkin; Ashok Ilankova; Barclay Morrison, III Stress relaxation tests using a custom designed microindentation device were performed on ten anatomic regions of fresh porcine brain (postmortem time <3 h). Using linear viscoelastic theory, a Prony series representation was used...
Journal Articles
Article Type: Research Papers
J Biomech Eng. July 2011, 133(7): 071006.
Published Online: July 18, 2011
... is that the experimental protocols influence the mechanical properties of both annulus fibrosus and nucleus pulposus. IVD extracted from bovine tails were tested in unconfined compression stress-relaxation experiments according to six different protocols, where for each protocol, the initial swelling of the samples...
Journal Articles
Article Type: Research Papers
J Biomech Eng. April 2011, 133(4): 041006.
Published Online: March 15, 2011
... in indentation, and ex vivo human cervical tissue in unconfined compression. Our results indicate that the identified rheological configurations provide good agreement with experimental data, including multiple constant strain rate load/unload tests and stress relaxation tests. Our experience suggests...
Journal Articles
Article Type: Research Papers
J Biomech Eng. July 2010, 132(7): 071014.
Published Online: June 2, 2010
... bovine humeral heads were embedded in agarose gel and cultured in vitro for up to 4 weeks. The nFCD of the cartilage was determined using the MRI gadolinium exclusion method. The equilibrium modulus was determined using a compressive stress relaxation test, and the dynamic modulus was determined...
Journal Articles
Article Type: Research Papers
J Biomech Eng. July 2010, 132(7): 071001.
Published Online: May 14, 2010
...Shruti Pai; William R. Ledoux Accurate quantification of soft tissue properties, specifically the stress relaxation behavior of viscoelastic tissues such as plantar tissue, requires precise testing under physiologically relevant loading. However, limitations of testing equipment often result...
Journal Articles
Article Type: Research Papers
J Biomech Eng. October 2009, 131(10): 101007.
Published Online: September 2, 2009
... permeability in a single osteon. Data from an experimental stress-relaxation test in a single osteon are used to derive the PLC permeability by curve fitting to theoretical results from a compressible transverse isotropic poroelastic model of a porous annular disk under a ramp loading history ( 2007...
Journal Articles
Article Type: Research Papers
J Biomech Eng. August 2009, 131(8): 081005.
Published Online: July 2, 2009
... model (BPVE) from confined compression-stress relaxation measurements to extract the strain dependent hydraulic permeability variation and cone-plate rheometer measurements to obtain the flow-independent viscoelastic constants for the solid-matrix phase. The model is then applied to simulate...
Journal Articles
Article Type: Research Papers
J Biomech Eng. July 2009, 131(7): 071001.
Published Online: June 5, 2009
... show that temperature has great influence on the stress-relaxation behavior of skin tissue under both hyperthermal and hypothermic temperatures; the quantitative relationship that has been found between temperature and the viscoelastic parameter (the elastic fraction or fractional energy dissipation...
Journal Articles
Article Type: Research Papers
J Biomech Eng. June 2009, 131(6): 061008.
Published Online: April 29, 2009
.... The present study investigates the regional variations in the elastic and equilibrium moduli of the condylar cartilage under high strains using unconfined compression and stress relaxation, with aims to facilitate future tissue engineering studies. Porcine condylar cartilages from five regions (anterior...
Journal Articles
Article Type: Research Papers
J Biomech Eng. June 2009, 131(6): 061005.
Published Online: April 27, 2009
... of this work was to further characterize the biomechanical characteristics from stress relaxation and dynamic cyclical indentation testing of normal and damaged articular cartilage and to correlate the biotribological characteristic findings with the biomechanical data. Quasilinear viscoelastic (QLV) theory...
Journal Articles
Article Type: Research Papers
J Biomech Eng. May 2009, 131(5): 051004.
Published Online: March 24, 2009
... molecule. 04 02 2008 17 11 2008 24 03 2009 biochemistry biomechanics deformation elongation enzymes molecular biophysics reaction kinetics collagen cleavage deformation enzyme mechanokinetics stress relaxation Collagen degradation is a mechanism...
Journal Articles
Article Type: Research Papers
J Biomech Eng. April 2009, 131(4): 041009.
Published Online: February 4, 2009
.... Biomechanically, this is the first study in the literature to quantify torsional stress relaxation, failure torque, and failure angle for the intact and repaired human scapholunate ligament. Surgically, reconstruction with bovine tendon may warrant further investigation as a method to potentially retain function...