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Article

Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework

1
Institute of Mechanics, TU Dortmund University, Leonhard-Euler-Str. 5, 44227 Dortmund, Germany
2
Division of Solid Mechanics, Lund University, P.O. Box 118, 22100 Lund, Sweden
*
Author to whom correspondence should be addressed.
Materials 2020, 13(14), 3156; https://doi.org/10.3390/ma13143156
Received: 15 June 2020 / Revised: 6 July 2020 / Accepted: 7 July 2020 / Published: 15 July 2020
The simulation of complex engineering components and structures under loads requires the formulation and adequate calibration of appropriate material models. This work introduces an optimisation-based scheme for the calibration of viscoelastic material models that are coupled to gradient-enhanced damage in a finite strain setting. The parameter identification scheme is applied to a self-diagnostic poly(dimethylsiloxane) (PDMS) elastomer, where so-called mechanophore units are incorporated within the polymeric microstructure. The present contribution, however, focuses on the purely mechanical response of the material, combining experiments with homogeneous and inhomogeneous states of deformation. In effect, the results provided lay the groundwork for a future extension of the proposed parameter identification framework, where additional field-data provided by the self-diagnostic capabilities can be incorporated into the optimisation scheme. View Full-Text
Keywords: rate-dependent material behaviour; gradient-enhanced damage at large strains; parameter identification; finite elements rate-dependent material behaviour; gradient-enhanced damage at large strains; parameter identification; finite elements
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MDPI and ACS Style

Schulte, R.; Ostwald, R.; Menzel, A. Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework. Materials 2020, 13, 3156. https://doi.org/10.3390/ma13143156

AMA Style

Schulte R, Ostwald R, Menzel A. Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework. Materials. 2020; 13(14):3156. https://doi.org/10.3390/ma13143156

Chicago/Turabian Style

Schulte, Robin; Ostwald, Richard; Menzel, Andreas. 2020. "Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework" Materials 13, no. 14: 3156. https://doi.org/10.3390/ma13143156

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