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Full-Field Strain and Temperature Measurement of Epoxy Resin PR-520 Subjected to Tensile, Compressive, and Torsional Loading at Various Strain Rates

Konieczny, Mark J
http://rave.ohiolink.edu/etdc/view?acc_num=osu1556880386878411

Abstract Details

2019, Master of Science, Ohio State University, Aero/Astro Engineering.
With aircraft and aircraft engine manufacturers’ goal to create lighter more efficient components, there has been a trend of replacing traditional aircraft materials such as aluminum and titanium with various composites. The high strength to weight ratio, and application specific manufacturing of composites, make them excellent candidates for components such as fan blades, engine cases, fuselages, and even parts of wings. However, from the rigorous testing that must be passed to certify airworthiness, comes a need for computational modeling of these composite components to greatly reduce the costs incurred from manufacturing to final testing. Some of the most costly testing comes from the blade out engine test to prove that a fan blade dislodged from the rotor will be contained by the engine case. When attempting to model an impact situation, where the force is applied transversely to the case, it becomes necessary to know the properties of the polymer matrix, because it is the primary factor affecting the strain rate dependency and failure of the composite as a whole. The purpose of this study is to simultaneously measure the full field thermal and full field deformation response of epoxy resin PR-520 in tension, compression, and torsion tests conducted at strain rates of approximately 0.01 s-1, 1.0 s-1, and 350 s-1. 2-D and 3-D digital image correlation is used for full-field measurement of deformation, and high-speed infrared thermography is used for simultaneous full-field temperature measurements. The testing is conducted on several test apparatus, a servo-hydraulic load frame for the low and intermediate rate tests, and a tension, compression, and torsion Split-Hopkinson bar for the high rate tests, respectively. The results show a coupling between temperature change and strain in the test specimens, with cooling occurring during elastic deformation, and heating occurring during plastic deformation. The results also show a dependence of both thermal and mechanical response, on strain rate. However, the magnitude of these results is highly dependent on the loading mechanism with compression and shear showing more plastic deformation and temperature rise. The data generated in these tests can be used to modify the constitutive equations for the matrix material to allow better prediction of characteristics such as failure strain and failure stress, yield strain and yield stress, and fatigue in full composite models.
Amos Gilat (Advisor)
Prasad Mokashi (Committee Member)
105 p.
Aerospace Engineering; Mechanical Engineering
Thermo-mechanical Response; Infrared Thermography; Polymers; Composites;

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Citations

  • Konieczny, M. J. (2019). Full-Field Strain and Temperature Measurement of Epoxy Resin PR-520 Subjected to Tensile, Compressive, and Torsional Loading at Various Strain Rates [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556880386878411

    APA Style (7th edition)

  • Konieczny, Mark. Full-Field Strain and Temperature Measurement of Epoxy Resin PR-520 Subjected to Tensile, Compressive, and Torsional Loading at Various Strain Rates. 2019. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1556880386878411.

    MLA Style (8th edition)

  • Konieczny, Mark. "Full-Field Strain and Temperature Measurement of Epoxy Resin PR-520 Subjected to Tensile, Compressive, and Torsional Loading at Various Strain Rates." Master's thesis, Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556880386878411

    Chicago Manual of Style (17th edition)

osu1556880386878411
177
© 2019, some rights reserved.Creative Commons License Full-Field Strain and Temperature Measurement of Epoxy Resin PR-520 Subjected to Tensile, Compressive, and Torsional Loading at Various Strain Rates by Mark J Konieczny is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by The Ohio State University and OhioLINK.
Release 3.2.12