Cyclic Bending Response of Single- and Polycrystalline Thin Films: Two Dimensional Discrete Dislocation Dynamics

Hai Dong Fan; Qingyuan Wang; Muhammad Kashif Khan

doi:10.4028/www.scientific.net/AMM.275-277.132

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 275-277Cyclic Bending Response of Single- and...

Cyclic Bending Response of Single- and Polycrystalline Thin Films: Two Dimensional Discrete Dislocation Dynamics

Abstract:

The bending behavior of single- and polycrystalline thin films is modeled by two-dimensional discrete dislocation dynamics (DDD) to study the cyclic bending response. In the polycrystalline films, grain boundaries (GBs) are simulated with a penetrable dislocation-GB interaction model. Our results reveal that the single- and polycrystalline thin films under pure bending exhibit strong Bauschinger effect but no cyclic hardening or softening. Furthermore, the uploading response of each cycle can be divided into three stages, which are associated with the glide, annihilation and nucleation of dislocations, respectively.

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Periodical:

Applied Mechanics and Materials (Volumes 275-277)

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132-137

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https://doi.org/10.4028/www.scientific.net/AMM.275-277.132

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Online since:

January 2013

Authors:

Hai Dong Fan, Qingyuan Wang, Muhammad Kashif Khan

Keywords:

Cyclic Bending Response, Discrete Dislocation Dynamics, Penetrable Grain Boundary Model

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