Imperial College London
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DrVitoTagarielli

Faculty of Engineering, Department of Aeronautics

Reader in Mechanics of Solids
 
 
 
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Contact

 

+44 (0)20 7594 5167v.tagarielli

 
 
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Location

 

218City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ge:2021:10.1038/s41598-021-94957-0,
author = {Ge, W and Tagarielli, V},
doi = {10.1038/s41598-021-94957-0},
journal = {Scientific Reports},
pages = {1--18},
title = {A computational framework to establish data-driven constitutive models for time- or path-dependent heterogeneous solids},
url = {http://dx.doi.org/10.1038/s41598-021-94957-0},
volume = {11},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We propose and implement a computational procedure to establish data-driven surrogateconstitutive models for heterogeneous materials. We study the multiaxial response of non-linearn-phase composites via Finite Element (FE) simulations and computational homogenisation.Pseudo-random, multiaxial, non-proportional histories of macroscopic strain are imposed onvolume elements of n-phase composites, subject to periodic boundary conditions, and thecorresponding histories of macroscopic stresses and plastically dissipated energy are recorded.The recorded data is used to train surrogate, phenomenological constitutive models based onneural networks (NNs), and the accuracy of these models is assessed and discussed. We analyseheterogeneous composites with hyperelastic, viscoelastic or elastic-plastic local constitutivedescriptions. In each of these three cases, we propose and assess optimal choices of inputs andoutputs for the surrogate models and strategies for their training. We find that the proposedcomputational procedure can capture accurately and effectively the response of non-linear nphase composites subject to arbitrary mechanical loading.
AU  - Ge,W
AU  - Tagarielli,V
DO  - 10.1038/s41598-021-94957-0
EP  - 18
PY  - 2021///
SN  - 2045-2322
SP  - 1
TI  - A computational framework to establish data-driven constitutive models for time- or path-dependent heterogeneous solids
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-021-94957-0
UR  - https://www.nature.com/articles/s41598-021-94957-0
UR  - http://hdl.handle.net/10044/1/90603
VL  - 11
ER  -
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