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Conference Papers Year : 2009

Dynamics of Plastic Deformation Based on a Field Theory


The dynamics of plastic deformation and fracture is formulated based on the field equation derived by physical mesomechanics, a recent gauge theory of deformation and fracture. A constitutive equation in plasticity has been derived from the field equation, and the dynamics associated with the transition from a late stage of plastic deformation to the fracturing stage is discussed. These concepts have been applied to an attempt to reveal the loading history of materials. Aluminum specimens have been preloaded with a tensile machine to different stress levels. After released from the preload, these specimens have been reloaded within the linear range of the loading curve, and the resultant displacement field has been analyzed with the use of in-plane sensitive electronic speckle pattern interferometry. Consequently, it has been found that through analysis of the interferometric fringe patterns it is possible to infer the stress level that the specimen has experienced under the preloading. The observed feathers in the fringe patterns have been explained via the above-mentioned constitutive equation and related dynamics.
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hal-01092038 , version 1 (08-12-2014)


  • HAL Id : hal-01092038 , version 1


S Yoshida, T Sasaki, G.A. Gaffney. Dynamics of Plastic Deformation Based on a Field Theory. SEM 2009 Annual Conference & Exposition on Experimental & Applied Mechanics, Jun 2009, Albuquerque, United States. ⟨hal-01092038⟩
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