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Experimental and Numerical Analysis of Notched Composites Under Tension Loading

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Abstract

Experimental quasi-static tests were performed on center notched carbon fiber reinforced polymer (CFRP) composites having different stacking sequences made of G40-600/5245C prepreg. The three-dimensional Digital Image Correlation (DIC) technique was used during quasi-static tests conducted on quasi-isotropic notched samples to obtain the distribution of strains as a function of applied stress. A finite element model was built within Abaqus to predict the notched strength and the strain profiles for comparison with measured results. A user-material subroutine using the multi-continuum theory (MCT) as a failure initiation criterion and an energy-based damage evolution law as implemented by Autodesk Simulation Composite Analysis (ASCA) was used to conduct a quantitative comparison of strain components predicted by the analysis and obtained in the experiments. Good agreement between experimental data and numerical analyses results are observed. Modal analysis was carried out to investigate the effect of static damage on the dominant frequencies of the notched structure using the resulted degraded material elements. The first in-plane mode was found to be a good candidate for tracking the level of damage.

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Acknowledgments

The authors would like to acknowledge the support of ESM laboratory supervisors Mac McCord and Danny Reed in operating the MTS machine and constructing the materials

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The authors declare that they have no conflicts of interest.

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Authors and Affiliations

  1. Department of Biomedical Engineering and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA

    Bilel Aidi & Scott W. Case

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  1. Bilel Aidi
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  2. Scott W. Case
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Correspondence to Bilel Aidi.

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Aidi, B., Case, S.W. Experimental and Numerical Analysis of Notched Composites Under Tension Loading. Appl Compos Mater 22, 837–855 (2015). https://doi.org/10.1007/s10443-015-9439-2

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  • DOI: https://doi.org/10.1007/s10443-015-9439-2

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