Deformation and Ductile Fracture of a Low Alloy Steel under High Strain Rate Loading

Abdel-Malek, S.; Meyer, L. M.

Deformation and Ductile Fracture of a Low Alloy Steel under High Strain Rate Loading

dc.contributor.author	Abdel-Malek, S.	de
dc.contributor.author	Meyer, L. M.	de
dc.date.accessioned	2010-04-08T12:52:58Z
dc.date.available	2010-04-08T12:52:58Z
dc.date.issued	2006	de
dc.description.abstract	Ductile failure of metals always occurs after a specific amount of plastic deformation. Therefore, the investigation and characterization of the deformation behaviour is required to understand the damage process and to describe the failure by a suitable constitutive relation. The effects of temperature and strain rate on the mechanical properties are important for the description of the material behavior in many applications. The MTS model is used here to describe the material behavior of some low alloy steels in a wide range of temperature and strain rates. A new part of stress is added to the MTS model in order to consider the effect of the dynamic strain aging at low strain rate and high temperature. The determination of material data at high strain and high strain rate is needed to describe the real material behaviour, specially for the simulation of high deformation and fracture. A special technique is used here to stop the deformation of tension specimen at high strain rate in the necking zone to determine the true stress and true strain. Using FEM computations (LS-DYNA 3D), the stress triaxiality in the necking zone of a tensile specimen is calculated up to the crack initiation. It is shown that the strain hardening characteristics affect the development of stress triaxiality.	en
dc.identifier.uri	http://hdl.handle.net/2003/27074
dc.identifier.uri	http://dx.doi.org/10.17877/DE290R-12927
dc.language.iso	en	de
dc.publisher	Institut für Umformtechnik - Technische Universität Dortmund	de
dc.relation.ispartof	2nd international conference on high speed forming, March 20th - 21st, 2006, Dortmund, Germany	de
dc.subject	ductile failure	en
dc.subject	high plastic deformation	en
dc.subject	high strain rate	en
dc.subject.ddc	620	de
dc.subject.ddc	670	de
dc.title	Deformation and Ductile Fracture of a Low Alloy Steel under High Strain Rate Loading	en
dc.type	Text	de
dc.type.publicationtype	conferenceObject	de
dcterms.accessRights	open access

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