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Hexahedral Solid Element with Rotational Degrees of Freedom Based on a Novel Trail-Correction Displacement Interpolation Scheme

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Iranian Journal of Science and Technology, Transactions of Mechanical Engineering Aims and scope Submit manuscript

Abstract

To address the issue of incompatible nodal parameters between finite elements of different dimensions, this paper introduces a new interpolation formula, named “trial-correction” displacement interpolation, utilizing trilinear and cubic interpolations. This interpolation method is applied to construct an 8-node hexahedral solid element (Solid-H8-TC) with rotational degrees of freedom, featuring 6 nodal parameters including 3 translational and 3 rotational displacements. The element successfully passed the patch test and demonstrated convergence. Subsequent numerical examples show that the Solid-H8-TC element achieves a numerical accuracy of over 99% as the mesh is refined. Furthermore, the Solid-H8-TC element can be directly combined with shell elements, effectively resolving the compatibility issues of nodal parameters between finite elements of different dimensions. Lastly, the trial-correction displacement interpolation method employed in this study exhibits excellent scalability and provides a new theoretical basis for finite element analysis of plane, beam, and shell structures.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. U20A6004), the National Key R &D Program of China (Grant No. 2022YFB4701001), the Guangzhou Science and Technology Plan Project (Grant No. 202201010277). The authors greatly acknowledge the financial support.

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Correspondence to Zhijun Yang or Xin Chen.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Huang, G., Li, H., Lu, Y. et al. Hexahedral Solid Element with Rotational Degrees of Freedom Based on a Novel Trail-Correction Displacement Interpolation Scheme. Iran J Sci Technol Trans Mech Eng (2024). https://doi.org/10.1007/s40997-024-00763-0

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  • DOI: https://doi.org/10.1007/s40997-024-00763-0

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