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Master thesis_Peiyu Yang.pdf (5.5 MB)

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Experimental Techniques and Mechanical Behavior of T800/F3900 at Various Strain Rates

Yang, Peiyu
http://rave.ohiolink.edu/etdc/view?acc_num=osu1480601677646997

Abstract Details

2016, Master of Science, Ohio State University, Mechanical Engineering.
Mechanical behavior of the composite material T800/F3900, a strengthened epoxy carbon-fiber reinforced polymer, is investigated in multiple types of loading conditions at various strain rates. The objective of the project is to generate experimental data for calibration of the material model, MAT_213, in LS-DYNA for better predictive accuracy of the composite material in numerical simulations. Anisotropic material properties, strain rate effects and geometry effects are studied. In-plane and out-of-plane tension and compression tests are conducted at strain rates ranging from 0.001 1/s to 1000 1/s. In-plane shear experiments are performed to learn shear characteristics of the material in 1-2 and 2-1 directions. In-plane tension, compression and shear test samples are cut from a 0.125” 16-ply panel, and out-of-plane tension and compression test samples are cut from a 0.7” 96-ply panel. Strain rate effects are noticeable in compression in the 90-degree and through thickness orientations, and more test data is required to see if strain rate effects exist in tension in the transverse direction. Anisotropic mechanical behavior is also significant in each orientation. Four geometries of tension test samples are attempted in tension test series since pre-mature failure is seen taking place in tension test samples. Tension test data from each geometry are studied and compared in order to learn how geometry influences the mechanical responses. Double notch shear specimen is used for investigating in-plane shear properties of the material. The physical loading conditions applied on the test samples and failure modes in 1-2 shear and 2-1 shear experiments are studied in the shear test series. Two-dimensional and three-dimensional Digital Image Correlation are used to measure full field strains. Numerical simulations are done using LS-DYNA for investigating the hydrostatic stress states at the endpoint of the parallel gage section of the tension dobgone test samples. Strain states from simulation results are also compared to DIC measurement data.
Amos Gilat, Dr. (Advisor)
Brian Harper, Dr. (Committee Member)
117 p.
Mechanical Engineering
Composites, split Hopkinson bar, Digital Image Correlation, Dynamic test, LS-DYNA, Finite Element Analysis

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Citations

  • Yang, P. (2016). Experimental Techniques and Mechanical Behavior of T800/F3900 at Various Strain Rates [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480601677646997

    APA Style (7th edition)

  • Yang, Peiyu. Experimental Techniques and Mechanical Behavior of T800/F3900 at Various Strain Rates. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1480601677646997.

    MLA Style (8th edition)

  • Yang, Peiyu. "Experimental Techniques and Mechanical Behavior of T800/F3900 at Various Strain Rates." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480601677646997

    Chicago Manual of Style (17th edition)

osu1480601677646997
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This open access ETD is published by The Ohio State University and OhioLINK.