STEREOMETRY OF COMPRESSED CONOIDS OF ELEMENT Q8
DOI:
https://doi.org/10.34185/1991-7848.itmm.2021.01.024Keywords:
basis functions of finite element q8, polynomial conoid, trigonometric conoid, compression of conoid directrix effectAbstract
The paper considers new models of bases of serendipity finite elements (FE) Q8. In recent years, the library of serendipity finite elements has been significantly replenished with non-standard (alternative) models. The reasons for the inadequacy of the spectrum were identified and "recipes" were proposed to eliminate this shortcoming of standard serendipity models. New approaches to modeling bases with the help of hierarchical forms force to abandon conoids - linear surfaces that are associated with intermediate nodes of standard elements. Therefore, research is being conducted today, and it is not necessary to give up conoids. The paper shows how by compressing the surface of the conoid it is possible to obtain a mathematically sound and physically adequate spectrum of nodal loads.
References
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