Deformation-induced hydrolysis of a degradable polymeric cylindrical annulus.
Deformation-induced hydrolysis of a degradable polymeric cylindrical annulus.
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DOI：
10.1007/s10237-009-0168-z
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发表时间：
2010-04
影响因子：
3.5
通讯作者：
Moore, James E., Jr.
中科院分区：
文献类型：
--
作者：
Soares, Joao S.;Rajagopal, Kumbakonam R.;Moore, James E., Jr.
开发了一种用于描述材料变形诱导降解反应的物理一致性框架，并将其应用于特定的可生物降解聚合物系统。在目前的情况下，能量耗散通过水解降解的机制，其影响被纳入本构模型，通过适当规定的形式耗散率和降解依赖的亥姆霍兹势的变化与材料的降解程度。当不发生降解时，材料的响应遵循幂律广义neo-Hookean材料的响应，其适合单轴拉伸下未降解的聚（L-乳酸）的响应。我们研究了退化圆柱环的膨胀和延伸以及变形对退化机制及其随之而来的力学响应的影响。由于降解而导致的机械性能的降低赋予可生物降解材料的响应时间依赖性特征：当受到保持固定变形松弛所需的恒定载荷和应力时，材料蠕变。
A thermodynamically consistent framework for describing the response of materials undergoing deformation-induced degradation is developed and applied to a particular biodegradable polymer system. In the current case, energy is dissipated through the mechanism of hydrolytic degradation and its effects are incorporated in the constitutive model by appropriately stipulating the forms for the rate of dissipation and for the degradation-dependent Helmholtz potential which changes with the extent of the degradation of the material. When degradation does not occur, the response of the material follows the response of a power-law generalized neo-Hookean material that fits the response of the non-degraded poly(L-lactic acid) under uniaxial extension. We study the inflation and extension of a degrading cylindrical annulus and the influence of the deformation on the mechanism of degradation and its consequent mechanical response. Depreciation of mechanical properties due to degradation confers time-dependent characteristics to the response of the biodegradable material: the material creeps when subjected to constant loads and stresses necessary to keep a fixed deformation relax.
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影响因子：
2.5
作者：
KNOWLES, JK
通讯作者：
KNOWLES, JK
影响因子：
9.8
作者：
Rajagopal, K. R.;Srinivasa, A. R.;Wineman, A. S.
通讯作者：
Wineman, A. S.
DOI：
10.1016/j.ijengsci.2008.07.001
发表时间：
2009-01-01
影响因子：
6.6
作者：
Soares, J. S.
通讯作者：
Soares, J. S.
影响因子：
5.9
作者：
Lunt, J
通讯作者：
Lunt, J
DOI：
10.1007/s00033-004-4019-6
发表时间：
2004-09-01
影响因子：
2
作者：
Rajagopal, KR;Srinivasa, AR
通讯作者：
Srinivasa, AR