期刊
JOURNAL OF BIOMECHANICS
卷 40, 期 14, 页码 3070-3078出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2007.03.019
关键词
quasi-linear viscoelasticity; viscoelastic modeling; reconstituted collagen
资金
- NHLBI NIH HHS [K25 HL079165-01A1, HL079165, K25 HL079165] Funding Source: Medline
- NIAMS NIH HHS [R01 AR047591, AR47591] Funding Source: Medline
- NIGMS NIH HHS [GM038838] Funding Source: Medline
- NINDS NIH HHS [NS055951, R01 NS055951, R56 NS055951, R01 NS055951-02, R01 NS055951-01A1] Funding Source: Medline
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [K25HL079165] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES [R01AR047591] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM038838] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS055951] Funding Source: NIH RePORTER
The fitting of quasi-linear viscoelastic (QLV) constitutive models to material data often involves somewhat cumbersome numerical convolution. A new approach to treating quasi-linearity in I-D is described and applied to characterize the behavior of reconstituted collagen. This approach is based on a new principle for including nonlinearity and requires considerably less computation than other comparable models for both model calibration and response prediction, especially for smoothly applied stretching. Additionally, the approach allows relaxation to adapt with the strain history. The modeling approach is demonstrated through tests on pure reconstituted collagen. Sequences of ramp-and-hold stretching tests were applied to rectangular collagen specimens. The relaxation force data from the hold was used to calibrate a new adaptive QLV model and several models from literature, and the force data from the ramp was used to check the accuracy of model predictions. Additionally, the ability of the models to predict the force response on a reloading of the specimen was assessed. The adaptive QLV model based on this new approach predicts collagen behavior comparably to or better than existing models, with much less computation. (c) 2007 Elsevier Ltd. All rights reserved.
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