A simplified approach to quasi-linear viscoelastic modeling
A simplified approach to quasi-linear viscoelastic modeling
复制标题
DOI：
10.1016/j.jbiomech.2007.03.019
复制
发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Genin, Guy M.
中科院分区：
文献类型：
--
作者：
Nekouzadeh, Ali;Pryse, Kenneth M.;Genin, Guy M.
拟线性粘弹性（QLV）本构模型的材料数据的拟合往往涉及到一些繁琐的数值卷积。提出了一种新的处理I-D中准线性的方法，并将其应用于表征重构胶原的行为。这种方法是基于一个新的原则，包括非线性和需要相当少的计算比其他可比模型的模型校准和响应预测，特别是平稳应用拉伸。此外，该方法允许松弛适应应变history.The建模方法是通过纯重组胶原蛋白的测试证明。对矩形胶原标本进行了一系列的“斜升-保持”拉伸试验。“保持”的松弛力数据用于校准新的“自适应QLV模型”和文献中的几个模型，“斜坡”的力数据用于检查模型预测的准确性。此外，模型的能力，以预测对重新加载的标本的力响应进行了评估。“自适应QLV模型”的基础上，这种新的方法预测胶原蛋白的行为，或优于现有的模型，计算量少得多。(c)2007爱思唯尔有限公司保留所有权利。
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.