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Mechanical Engineering

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Electronic Theses and Dissertations

1978

Articles 1 - 2 of 2

Full-Text Articles in Engineering

Torsional Vibrations Of A Composite Elastic/Viscoelastic Cylindrical Shaft, Deepak Kumar Mullick Jan 1978

Torsional Vibrations Of A Composite Elastic/Viscoelastic Cylindrical Shaft, Deepak Kumar Mullick

Electronic Theses and Dissertations

The primary objective of this research is to analyze the torsional vibrations of a composite bar, and the parameters associated with the vibrations. The ultimate goal in this study of vibrations is to determine their effect on the performance and safety of the system under consideration.


Comparison Of Theoretical And Experimental Results Pertaining To R-Curves In Low And High Ductility Solids, Rabindra Nath Dash Jan 1978

Comparison Of Theoretical And Experimental Results Pertaining To R-Curves In Low And High Ductility Solids, Rabindra Nath Dash

Electronic Theses and Dissertations

Existing linear elastic fracture mechanics and J-integral analyses are well suited for safety assessments of high-strength, low-toughness materials. These analyses apply only to the onset of crack growth, which is usually tantamount to crack instability and structural failure in that class of materials. However, this is not the case for the low-strength, high-toughness materials in which crack instability may be preceeded [sic] by extensive stable crack growth under rising loads. Here, a substantial margin of safety may exist even when the onset of crack growth is imminent. This thesis describes research leading to a ductile fracture-mechanics methodology designed to treat …