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Material dispersion in dynamic deformation process of solids under impact action
Authors:Adam Glema
Affiliation:Poznan University of Technology, Institute of Structural Engineering, Piotrowo 5, 60-965 Poznan, Poland
Abstract:
The dispersion phenomenon is studied to introduce the adequate material model for the advanced states of dynamic deformation processes. The evolution problem is formulated within the frame of theory of thermodynamics and viscoplasticity. Mathematical analysis for elastic, plastic and viscoplastic material evidence the non-dispersive or dispersive property. Occurrence of dispersion in the analysis problem has the consequences not only for constitutive relation. It influences the whole problem with advantages in formulation and solution. Numerical results of example problems present qualitatively different mechanical response for materials with different dispersion. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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