Two-Dimensional Stress Waves Resulting from Axisymmetric Impact of Finite-Length Rods.
NORTH CAROLINA STATE UNIV RALEIGH
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A numerical analysis has been developed to study the dynamic problem of axisymmetrically impacting, finite-length rods. The analysis is based upon the method of characteristics and the medium is assumed elasticviscoplastic, satisfying von Mises yielding criterion, isotropic hardening, and viscoplastic incompressibility. The numerical results are in general comparable to those of elastic-plastic solids by the numerical finite-difference method. The paper examines the influence of viscoplasticity on two-dimensional stress wave propagation, dynamic Saint Venants principle, reflection of two-dimensional stress waves from free boundaries, and internal phenomena due to stress wave interactions. Author