Examination of intrinsic and extrinsic size effect in thin specimens through crystal plasticity frameworks

Examination of intrinsic and extrinsic size effect in thin specimens through crystal plasticity frameworks


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Abstract. Manufacturing devices at the microscale requires a precise analysis for desirable mechanical behavior. As the products of microscale forming operations have a comparable thickness dimension with grain size, the ratio between thickness and grain size (t/d) becomes an important aspect of mechanical behavior. A number of experimental studies investigated this phenomenon and have shown the influence of the t/d ratio in micron-sized sheet specimens. On the other hand, the computational studies addressing this phenomenon employing micromechanics-based models are quite restricted. The current study aims to investigate the t/d ratio effect through finite element method (FEM) simulations with both local and nonlocal crystal plasticity frameworks. The numerical analyses with the local crystal plasticity framework are obtained by utilizing two different methodologies, where the initial slip resistance is taken as constant or modified using a subroutine based on grain size effects and slip system interactions (see [1]).

Crystal Plasticity, Size Effect, t/d Ratio Influence

Published online 4/19/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: GÜNAY Enes, BULUT Orhun, YALÇINKAYA Tuncay, Examination of intrinsic and extrinsic size effect in thin specimens through crystal plasticity frameworks, Materials Research Proceedings, Vol. 28, pp 1471-1480, 2023

DOI: https://doi.org/10.21741/9781644902479-159

The article was published as article 159 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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