Performance Evaluation of Elastoviscoplastic Concrete Model
Publication: Journal of Engineering Mechanics
Volume 126, Issue 9
Abstract
In this study we examine the dynamic strength enhancement and the regularization properties of viscoplasticity with regard to strain softening in tension. To this end we extend the elastoplastic concrete model by Kang and Willam to the viscoplastic Duvaut-Lions overstress formulation. Our main focus is (1) the difference of dynamic strength increase in tension, compression, and shear when only a single viscosity parameter is introduced in the form of the relaxation time, and (2) the regularization of localized failure when we compare elastoviscoplastic with elastoplastic strain softening. Thereby, it is understood that the brittle/ductile modes of failure in tension, compression, and shear depend not only on the loading path, but also on the loading rate at high-speed impact.
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Published In
Journal of Engineering Mechanics
Volume 126 • Issue 9 • September 2000
Pages: 995 - 1000
History
Received: Sep 17, 1999
Published online: Sep 1, 2000
Published in print: Sep 2000
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