Linearized Bayesian inference for Young’s modulus parameter field in an elastic model of slender structures
Linearized Bayesian inference for Young’s modulus parameter field in an elastic model of slender structures
复制标题
细长结构弹性模型中杨氏模量参数场的线性贝叶斯推理
DOI:
10.1098/rspa.2019.0476
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Goyal, Sachin
中科院分区:
文献类型:
--
作者:
Fatehiboroujeni, Soheil;Petra, Noemi;Goyal, Sachin
The deformations of several slender structures at nano-scale are conceivably sensitive to their non-homogenous elasticity. Owing to their small scale, it is not feasible to discern their elasticity parameter fields accurately using observations from physical experiments. Molecular dynamics simulations can provide an alternative or additional source of data. However, the challenges still lie in developing computationally efficient and robust methods to solve inverse problems to infer the elasticity parameter field from the deformations. In this paper, we formulate an inverse problem governed by a linear elastic model in a Bayesian inference framework. To make the problem tractable, we use a Gaussian approximation of the posterior probability distribution that results from the Bayesian solution of the inverse problem of inferring Young’s modulus parameter fields from available data. The performance of the computational framework is demonstrated using two representative loading scenarios, one involving cantilever bending and the other involving stretching of a helical rod (an intrinsically curved structure). The results show that smoothly varying parameter fields can be reconstructed satisfactorily from noisy data. We also quantify the uncertainty in the inferred parameters and discuss the effect of the quality of the data on the reconstructions.
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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:
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作者:
L. A. Mihai;T. Woolley;A. Goriely
通讯作者:
A. Goriely
影响因子:
2.4
作者:
Hilfinger, Andreas;Chattopadhyay, Amit K.;Juelicher, Frank
通讯作者:
Juelicher, Frank
影响因子:
7.2
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通讯作者:
Guilleminot, J.
DOI:
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发表时间:
2006
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作者:
D. Lesnic
通讯作者:
D. Lesnic
DOI:
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