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Doctoral Dissertations

Theses/Dissertations

1972

<p>Concrete -- Fracture -- Mathematical models<br />Deformations (Mechanics)<br />Stress-strain curves -- Mathematical models</p>

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Deformation And Fracture Of Concrete Under Uniaxial Impact Loading, Esteban Eulogio Miranda Jan 1972

Deformation And Fracture Of Concrete Under Uniaxial Impact Loading, Esteban Eulogio Miranda

Doctoral Dissertations

"Stress wave propagation and interaction in plain concrete leading up to spall fracture was investigated experimentally with a computer numerical analysis of the bar-geometry axial-impact loading. The critical normal fracture strain energy U and mechanical energy W criteria are proposed for the spatial and time dependence explanation of spallation in concrete. The energy criteria are special cases of a more generalized cumulative damage model of the form:....

Finite-difference analyses of the wave propagation and interactions in the split Hopkinson bar showed that early failure in brittle materials limits the application of the conventional method of analysis because equilibrium in the …