Engineering Mechanics

Proceedings Vol. 26 (2020)

ENGINEERING MECHANICS 2020

Copyright © 2020 Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics

 

Brož P., Dobiáš D.
pages 90 - 93, full text

Cyclic plasticity lies at the root of fatigue fracture in the ductile substances. Concurrently, plastic material models solving the total loading path are applying to computer processing very exacting, on the high numbers of load cycles. Consequently, for that end, in the treatise presented is introduced, in line with (Seiler, 2020), a model with especially small computational labor. It yields a macroscopic characterization of fatigue fracture by mixing the phase-field technique for brittle fracture with typical resistance interpretation. We obtain a local lifetime variable that depreciates the fracture durability gradually. When inferring the stress-strain path at the most, from cyclic material characteristic, only one increment per load cycle is needed. The version permits to depict fatigue crack initiation, growth and residual fracture.

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