Spatially-dependent material uncertainties in anisotropic nonlinear elasticity: Stochastic modeling, identification, and propagation
Spatially-dependent material uncertainties in anisotropic nonlinear elasticity: Stochastic modeling, identification, and propagation
复制标题
各向异性非线性弹性中的空间相关材料不确定性:随机建模、识别和传播
DOI:
10.1016/j.cma.2022.114897
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发表时间:
2022
影响因子:
7.2
通讯作者:
Guilleminot, Johann
中科院分区:
文献类型:
--
作者:
Chen, Peiyi;Guilleminot, Johann
This paper develops a stochastic model for the spatially-dependent material parameters parameterizing anisotropic strain energy density functions. The construction is cast within the framework of information theory, which is invoked to derive a least-informative model while ensuring consistency with theoretical requirements in finite elasticity. Specifically, almost sure polyconvexity and uniform growth conditions are enforced through proper repulsion constraints and regularization, hence making the forward problem of uncertainty propagation well posed. In addition, transformations arising from the linearization procedure are introduced for consistency and induce statistical dependencies in the primary variables. The latter include material moduli, a weight balancing between the isotropic and anisotropic contributions, and the angle defining the structural tensors. The identification of the model is subsequently performed, using an existing database on human arterial walls. Maximum likelihood estimators are obtained and provided for the adventitia, media, and intima layers, which enables the use of the proposed model as a generative surrogate for, e.g., training and classification in data-driven approaches integrating inter-patient variability. Finally, uncertainty propagation on a realistic, patient-specific geometry is conducted to demonstrate the efficiency of the stochastic modeling framework.
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DOI:
10.1098/rspa.2017.0858
发表时间:
2018
期刊:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
L. A. Mihai;T. Woolley;A. Goriely
通讯作者:
A. Goriely
DOI:
10.1016/j.cma.2018.12.036
发表时间:
2019-04
影响因子:
7.2
作者:
B. Staber;J. Guilleminot;Christian Soize;J. Michopoulos;A. Iliopoulos
通讯作者:
B. Staber;J. Guilleminot;Christian Soize;J. Michopoulos;A. Iliopoulos
影响因子:
7.2
作者:
Staber, B.;Guilleminot, J.
通讯作者:
Guilleminot, J.
DOI:
10.1137/120898346
发表时间:
2013
期刊:
Multiscale Model. Simul.
影响因子:
--
作者:
J. Guilleminot;Christian Soize
通讯作者:
Christian Soize
影响因子:
2
作者:
L. A. Mihai;Danielle Fitt;Thomas E. Woolley;A. Goriely
通讯作者:
A. Goriely