Finite element analysis of brittle materials in axial compression typically uses element deletion to allow continued global deformation post-element-failure. However, element deletion produces cyclic load-displacement curves that underestimate energy absorption and are not representative of a continuum system. Two key observations support the conclusion that results from an appropriately discretized model can be an adequate representation of a continuum system. Specifically, the frequency of the oscillations in the load-displacement curve is directly dependent upon element length in the loading direction, and the peak amplitudes of oscillations are mesh size independent. A method of post-processing the analysis results, by connecting the peak amplitudes of oscillations, is proposed and applied to a series of continuous carbon fiber composite crush tubes. The load-displacement curve, stable crushing load, and specific energy absorption of the post-processed results compare well to an experimental study of crush tubes with similar layups.
Cutting, Rebecca A., et al. "A novel post-processing method for progressive failure analysis of brittle composite compression." Journal of Composite Materials, vol. 56, no. 19, May. 2022. https://doi.org/10.1177/00219983221101985
Cutting, Rebecca A., Favaloro, Anthony J., & Goodsell, Johnathan E. (2022). A novel post-processing method for progressive failure analysis of brittle composite compression. Journal of Composite Materials, 56(19). https://doi.org/10.1177/00219983221101985
Cutting, Rebecca A., Favaloro, Anthony J., and Goodsell, Johnathan E., "A novel post-processing method for progressive failure analysis of brittle composite compression," Journal of Composite Materials 56, no. 19 (2022), https://doi.org/10.1177/00219983221101985
@article{osti_1980941,
author = {Cutting, Rebecca A. and Favaloro, Anthony J. and Goodsell, Johnathan E.},
title = {A novel post-processing method for progressive failure analysis of brittle composite compression},
annote = {Finite element analysis of brittle materials in axial compression typically uses element deletion to allow continued global deformation post-element-failure. However, element deletion produces cyclic load-displacement curves that underestimate energy absorption and are not representative of a continuum system. Two key observations support the conclusion that results from an appropriately discretized model can be an adequate representation of a continuum system. Specifically, the frequency of the oscillations in the load-displacement curve is directly dependent upon element length in the loading direction, and the peak amplitudes of oscillations are mesh size independent. A method of post-processing the analysis results, by connecting the peak amplitudes of oscillations, is proposed and applied to a series of continuous carbon fiber composite crush tubes. The load-displacement curve, stable crushing load, and specific energy absorption of the post-processed results compare well to an experimental study of crush tubes with similar layups.},
doi = {10.1177/00219983221101985},
url = {https://www.osti.gov/biblio/1980941},
journal = {Journal of Composite Materials},
issn = {ISSN 0021-9983},
number = {19},
volume = {56},
place = {United States},
publisher = {SAGE},
year = {2022},
month = {05}}
ASME 2016 International Mechanical Engineering Congress and Exposition, Volume 14: Emerging Technologies; Materials: Genetics to Structures; Safety Engineering and Risk Analysishttps://doi.org/10.1115/IMECE2016-66635