Application of Continuum Damage Mechanics in discontinuous crack formation: Forward extrusion chevron

Date

2008-06-01

Author

Soyarslan, Celal
TEKKAYA, AHMET ERMAN
Akyüz, Uğurhan

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Materializing Continuum Damage Mechanics (CDM), numerical modeling of discrete internal cracks, namely central bursts, in direct forward extrusion process is presented. Accordingly, in a thermodynamically consistent setting, a local Lemaitre variant damage model with quasi-unilateral evolution is coupled with hyperelastic-plasticity. The formulations are constructed in the principal axes where simultaneous local integration schemes are efficiently developed. To this end, the framework is implemented as ABAQUS/VUMAT subroutine to be used in an explicit FE solution scheme, and utilized in direct forward extrusion simulations for bearing steel, 100Cr6. Discontinuous cracks are obtained with the element deletion procedure, where the elements reaching the critical damage value are removed from the mesh. The periodicity of the cracks shows well accordance with the experimental facts. The investigations reveal that, application of the quasi-unilateral conditions together with the crack closure parameter has an indispensable effect on the damage accumulation zones by determining their internal or superficial character. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Subject Keywords

Fracture mechanisms (formation of central bursts), Finite elements, Finite strain, Damage coupled elasto-plasticity

URI

https://hdl.handle.net/11511/37482

Journal

ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK

DOI

https://doi.org/10.1002/zamm.200800013

Collections

Department of Civil Engineering, Article

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Citation Formats

C. Soyarslan, A. E. TEKKAYA, and U. Akyüz, “Application of Continuum Damage Mechanics in discontinuous crack formation: Forward extrusion chevron,” ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, pp. 436–453, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37482.