Results 271 to 280 of about 9,485 (315)

Modeling of Damage of Ductile Materials

2019
The paper discusses a thermodynamically consistent anisotropic continuum damage model for ductile metals. It takes into account different elastic potential functions to simulate the effect of damage on elastic material behavior. In addition, a yield condition and a flow rule describe plastic behavior whereas a damage criterion and a damage rule ...
Michael Brünig, Moritz Zistl, Steffen Gerke   +2 more
openaire   +1 more source

Damage initlation prediction in ductile failure

Scripta Metallurgica, 1988
Determination des parametres des materiaux necessaires a la prevision de la rupture. L'un de ces parametres est la deformation moyenne e N decrite sous la forme: √e N =1/H(σ c -σ m ) ou σ m est la contrainte moyenne, H et σ c sont des constantes de materiaux. Determination de H et σ c par des essais de choc et de traction sur un alliage d'aluminium
I.M. Fyfe, J.P. Bonhomme
openaire   +1 more source

Damage Model for Ductile Fracture

1986
Large plastic strain in metals is accompanied by nucleation and growth of microvoids and microcracks. This phenomenon is called “ductile plastic damage”; it leads to plastic (“ductile”) fracture. This kind of fracture is considered, for example, in the book of McClintock and Argon [1], from the viewpoint of physics.
openaire   +1 more source

A damage model for ductile metals

Nuclear Engineering and Design, 1989
Abstract A physically-based theory of damage for ductile metals is outlined. It rests upon a direct extension of the authors recently proposed viscoplastic model for finite deformations to include the effects of dislocation—void interactions as they manifest themselves in void nucleation, growth, and coalescence.
D.J. Bammann, E.C. Aifantis
openaire   +1 more source

Radiation Damage Evolution in Ductile Materials

2015
The problem investigated in the present work concerns the physical processes involved in radiation damage and the way they affect the mechanical properties of ductile materials. Multiscale modeling of evolution of radiation induced micro-damage in ductile materials subjected to periodic stress states in the inelastic range is presented.
Błażej Skoczeń, Aneta Ustrzycka
openaire   +1 more source

Damaging micromechanisms in ferritic–pearlitic ductile cast irons

Materials Science and Engineering: A, 2008
Abstract Microstructure influences on damaging mechanisms in ferritic–pearlitic ductile cast irons (DCIs) were investigated. Four different ferrite/pearlite volume fractions were considered, and in situ scanning electron microscope observations were performed during step by step tensile tests in a microtensile holder.
IACOVIELLO, Francesco, DI COCCO, Vittorio, V. PIACENTE, O. DI BARTOLOMEO   +3 more
openaire   +2 more sources

Bifurcation Effects in Ductile Metals With Nonlocal Damage

Journal of Applied Mechanics, 1994
The purpose of this paper is to investigate some bifurcation phenomena in a porous ductile material described by the classical Gurson (1977) model, but with a modified, nonlocal evolution equation for the porosity. Two distinct problems are analyzed theoretically: appearance of a discontinuous velocity gradient in a finite, inhomogeneous body, and ...
Leblond, J. B., Perrin, G., Devaux, J.
openaire   +1 more source

Fatigue Damaging Micromechanisms in Ductile Cast Irons

2006
Ductile iron discovery in 1948 gave a new lease on life to the cast iron family. In fact these cast irons are characterised both by a high castability and by high toughness values, combining cast irons and steel good properties. Ductile cast irons are also characterised by high fatigue crack propagation resistance, although this property is still not ...
CAVALLINI, Mauro, O. DI BARTOLOMEO, F. IACOVIELLO   +2 more
openaire   +2 more sources

Void Coalescence Model for Ductile Damage

AIP Conference Proceedings, 2002
A model for void coalescence for high strain rate ductile damage in metals is presented. The basic mechanism is void linking through an instability in the intervoid ligament. The formation probability of void clusters is calculated, as a function of cluster size, imposed stress, and strain.
openaire   +1 more source

Comparison of Ductile Damage Models

International Journal of Forming Processes, 2001
Cyril Bordreuil, Emmanuelle Vidal-Sallé, Jean-Claude Boyer, Antonio Bugini   +3 more
openaire   +4 more sources