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- Plexiglas -- Fracture -- Testing<br />Plexiglas -- Fracture -- Measurement<br />Surface energy -- Measurement -- Mathematical models<br />Notched bar testing<br />Plexiglas -- Analysis (1)
- Rock deformation<br />Granular materials<br />Granular materials -- Mechanical properties -- Mathematical models<br />Strains and stresses (1)
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Surface Energy Determinations In Plexiglas, Li-King Chen
Surface Energy Determinations In Plexiglas, Li-King Chen
Masters Theses
"Under irreversible conditions an effective surface energy of plexiglas for notched bars deformed in three-point bending was measured. The various equations proposed for evaluating surface energy are described and values of surface energy obtained using these equations are reported for a variety of sample dimensions. A comparison has been made between the results obtained. The effect of different notch shapes, sharp V, square U and round, on calculated values and fracture characteristics are noted. The Griffith theory is shown to be valid for large crack dimensions"--Abstract, page ii.
The Failure Criteria And Deformational Moduli Of Granular Rock, Kyung Chul Ko
The Failure Criteria And Deformational Moduli Of Granular Rock, Kyung Chul Ko
Masters Theses
"Analytical solutions of stress for composite material are obtained by means of mathematical theory of elasticity, assuming spherical inclusions and uniform displacements of boundaries of representative elements. These solutions show that the failure criteria of composite materials are complicated functions of the elastic moduli of matrix, inclusion and composite, and the volume ratio of matrix and inclusion. Combining this theory with Griffith's theory gives a new criteria for brittle failure of granular rook. This theory appears to provide a nearly perfect model for granular rooks, inasmuch as: a) most assumptions used in other criteria are eliminated, b) most phenomena in …