A CONSTITUTIVE MODEL FOR THE MECHANICAL-BEHAVIOR OF SOFT CONNECTIVE TISSUES
A CONSTITUTIVE MODEL FOR THE MECHANICAL-BEHAVIOR OF SOFT CONNECTIVE TISSUES
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DOI：
10.1016/0021-9290(87)90034-0
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发表时间：
1987-01-01
影响因子：
2.4
通讯作者：
EGAN, JM
中科院分区：
文献类型：
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作者：
EGAN, JM
通过考虑组织内胶原蛋白和糖胺聚糖 (GAG) 成分的作用，开发了软结缔组织的机械行为模型，以便检查 GAG 成分的变化可能对组织的机械性能施加控制的机制。据建议，存储在负载组织的胶原原纤维内的应变能可以转移到由带电 GAG 成分及其与胶原原纤维的静电相互作用产生的势场中。描述了一个基本机械单元来模拟这种能量传递，并且使用这些单元的组合来表示组织。所提出的组织模型的计算机实现表明它可以再现许多在软组织的速率相关机械行为中已被识别的特征。其中包括力-变形行为的非线性特性以及应力松弛行为随变形的近似不变性。该模型也与早期组织行为的本构表示一致。
A model of the mechanical behaviour of soft connective tissue has been developed by considering the role of the collagen and glycosaminoglycan (GAG) components within the tissue in order to examine the mechanism by which a variation in the GAG components may exert a control over the mechanical properties of the tissue. It is proposed that the strain energy stored within the collagen fibrils of the loaded tissue can be transferred into a potential field created by the charged GAG components and their electrostatic interaction with the collagen fibrils. A fundamental mechanical unit is described to simulate this energy transfer and a combination of such units is used to represent the tissue. The computer implementation of the proposed tissue model shows it to reproduce many features which have been recognized in the rate dependent mechanical behaviour of soft tissues. These include the characteristic non-linearity of the force-deformation behaviour and the approximate invariance of the stress relaxation behaviour with deformation. The model is also consistent with earlier constitutive representations of tissue behaviour.