Comparison of gradient elasticity models for the bending of micromaterials
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- 作者：Christian Liebold ; Christian.Liebold@tu-berlin.de" class="auth_mail" title="E-mail the corresponding author ; Wolfgang H. Mü ; ller
- 关键词：Strain gradient elasticity ; Size effect ; Micropolar theory ; Finite element variational formulation
- 刊名：Computational Materials Science
- 出版年：2016
- 出版时间：15 April 2016
- 年：2016
- 卷：116
- 期：Complete
- 页码：52-61
- 全文大小：1702 K
文摘
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A modified strain gradient- and micropolar continuum theory is presented.
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An analytical and numerical solution is derived from the equilibrium formulations.
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The finite element variational formulations are solved within the FEniCS project.
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AFM bending experiments with epoxy and SU-8 microbeams show a positive size effect.
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The material length scale parameters are fitted in a least square approach.