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Coulomb, Cooper, Casagrande

Coulomb, Cooper, Casagrande - Casagrande Cooper and Coulomb...

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Casagrande, Cooper, and Coulomb Arthur Casagrande was a geotechnical engineer who began Harvard’s soil mechanics program in 1932. He motivated his students to study soil mechanics and taught the creators of modern Geotechnical Engineering. Casagrande researched soil classification, the leakage of soil through the earth and shear strength. On the plasticity chart, the “A-line” was named after him. Casagrande found from tests that the critical void ratio (e c ) changed with confining pressure. He invented the Casagrande device which is used to find the liquid limit of a sample of soil or clay relative to the Atterberg limits. These values are necessary and applied in soil mechanics, for example, plasticity index or activity. Theodore Cooper was a civil engineer who worked on the Newburyport Bridge, the Hoosac Tunnel and Eads Bridge along with other projects. Cooper’s most impressive works were bridges, although he worked on various other structures. The third Sixth Street Bridge is the only one project completely designed by Cooper that is still standing.
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