Inhomogeneous Beam of Circular Cross-Section with Concentric Lengthwise Cracks: A Fracture Analysis with Considering Viscoplastic Behaviour

Victor Iliev Rizov

doi:10.4028/p-3welmb

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 419Inhomogeneous Beam of Circular Cross-Section with...

Inhomogeneous Beam of Circular Cross-Section with Concentric Lengthwise Cracks: A Fracture Analysis with Considering Viscoplastic Behaviour

Abstract:

In this paper, a lengthwise fracture analysis of a viscoplastic inhomogeneous cantilever beam of circular cross-section acted upon by a torsion moment is presented. The beam is with an arbitrary number of concentric lengthwise cracks. The time-dependent mechanical behaviour of the beam is treated by a viscoplastic model representing a series of units which are combinations of springs, dashpots and frictional sliders. Due to the sliders, the model units start to deform one after another with increasing of the external load. Constitutive laws of the viscoplastic model are obtained and applied to treat the beam mechanical behaviour when deriving time-dependent strain energy release rates for the lengthwise cracks.

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Periodical:

Defect and Diffusion Forum (Volume 419)

Pages:

85-90

DOI:

https://doi.org/10.4028/p-3welmb

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Online since:

October 2022

Authors:

Victor Iliev Rizov*

Keywords:

Beam, Concentric Cracks, Inhomogeneous Structural Material, Lengthwise Fracture, Viscoplastic Mechanical Behaviour

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