Collageneous tissues, such as ligaments and tendons, are viscoelastic materials: they creep under constant stress, relax under constant strain, and show hysteresis when cyclically loaded and unloaded . Although these tissues are viscoelastic, researchers in biomechanics often study their “pseudo-elastic” properties after subjected them to “preconditioning.” Preconditioning is an experimental procedure consisting of loading and unloading biological tissues repeatedly until no further change between the loading and unloading stress-strain curves are observed. This procedure significantly affects the measurement of mechanical properties . Unfortunately, because there is no standard preconditioning protocol used in biomechanical testing, comparison among different experimental studies that quantify the mechanical properties of biological tissues remains difficult .
- Bioengineering Division
A Constitutive Model for Preconditioining in Ligaments and Tendons
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Sopakayang, R, & De Vita, R. "A Constitutive Model for Preconditioining in Ligaments and Tendons." Proceedings of the ASME 2009 Summer Bioengineering Conference. ASME 2009 Summer Bioengineering Conference, Parts A and B. Lake Tahoe, California, USA. June 17–21, 2009. pp. 673-674. ASME. https://doi.org/10.1115/SBC2009-206286
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