Theses and Dissertations
FAILURE OF COMPOSITE PLATES SUBJECTED TO SHOCK LOADING
(Monterey, CA; Naval Postgraduate School, 2020-12)
Underwater explosions and their associated devastating effects are not new to the U.S. Navy. Accurately modeling and scaling them for research and development, however, are areas in need of further study as large explosions ...
STUDY OF COMPOSITE STRUCTURES SUBJECTED TO UNDERWATER SHOCK LOADING
(Monterey, CA; Naval Postgraduate School, 2021-12)
Underwater explosions (UNDEX) produce severe and complex loadings in naval applications. Increased use of composite materials in naval applications requires better understanding of how composite structures will respond and ...
TRIBOELECTRIC NANOGENERATORS (TENG) WITH ROTATIONAL MOTION
(Monterey, CA; Naval Postgraduate School, 2020-03)
Fossil fuels produce most of the world’s energy. They have a high energy density, but they release greenhouse gases and are a limited resource. Renewable energy is a relatively new concept that produces low to zero emissions ...
A COMPARISON OF DUCTILE AND BRITTLE MATERIAL FAIL CHARACTERISTICS IN RESPONSE TO TENSILE AND CYCLIC LOADING
(Monterey, CA; Naval Postgraduate School, 2022-12)
Understanding when a material will fail is of utmost importance to the military. Fail characteristics of emerging materials like composites are not well known. Additionally, the understanding of how composites compare to ...
SIMULATION AND VALIDATION OF COMPOSITE FLUID STRUCTURE INTERACTIONS
(Monterey, CA; Naval Postgraduate School, 2022-12)
As the U.S. Navy’s use of composite materials in marine structures expands, the material’s response to dynamic loading, especially that from underwater explosions, is becoming more vital to understand. To improve this ...
FAILURE OF BOLT FASTENED BRITTLE MATERIALS
(Monterey, CA; Naval Postgraduate School, 2022-12)
Since the early twentieth century, a substantial number of models, theories, and computational methods have been developed to predict material failure in brittle and quasi-brittle materials. In most cases, the proposed ...
CYLINDRICAL STRUCTURE UNDER SHOCK LOADING
(Monterey, CA; Naval Postgraduate School, 2023-03)
Underwater pressure vessels experience a multitude of dynamic and pressure loading when in a submerged environment. Internally, those forces are negligible because of the sound structural integrity the vessel is providing. ...
STUDY OF FATIGUE FAILURE OF COMPOSITE MATERIALS
(Monterey, CA; Naval Postgraduate School, 2020-06)
The use of composite materials in U.S. Navy aircraft and other vessels has become increasingly popular due to the composites’ high strength to weight ratio. The nature of these military structures causes them to be exposed ...
HYBRID INSPIRED TRIBOELECTRIC NANOGENERATOR USING CONTACT SEPARATION MODE
(Monterey, CA; Naval Postgraduate School, 2021-06)
The triboelectric nanogenerator (TENG) concept was used to build four contact separation TENG models to harvest mechanical vibration from an aircraft wing on an unmanned air and surface vehicle. The first three models used ...
ROTATIONAL MOTION TRIBOELECTRIC NANOGENERATORS (TENG)
(Monterey, CA; Naval Postgraduate School, 2020-12)
The triboelectric nanogenerator (TENG) experiments conducted for this research are a continuation of previous research at the Naval Postgraduate School in Monterey, California. Teflon and copper were used as the primary ...
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Didoszak, Jarema M. (17)
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Mechanical Engineering (17)