Von Mises yield criteria and triaxiality factor have been used to determine the critical limits of stress triaxiality for the materials under plane strain condition. A generalized mathematical model for triaxia
Even higher levels of stress triaxiality are achieved in cracked specimens (e.g., the compact tension (CT) bars in Fig. 2.1) with maxima expected to be around 3.0 ahead of the crack tip of a strain-hardening material under plane strain conditions (McMeeking, 1977). The higher the strain-...
The effect of stress triaxiality on plastic instability and fracture strain was also examined. The deformation process should be considered as explained, and the anisotropic plastic response induced by the deformation could be introduced in constitutive equations of G'Sell....
The function g1n is approximated for plane stress by (Shih and Hutchinson, 1976; Ohji et al., 1981) (33)g1(n)=3.85n1/2(1-1n)+πnfor plane stress (34)g1(n)=π(πn/2)(n-1)/(2n-1)for plane stress For a plane strain crack subjected to remote normal tension σ∞ and ...
Similar to the PST ratio, the stress triaxiality ratioT(Eq.3) provides insight into the nature of the stress concentrations in front of the notch. Generally, a high tensile stress triaxiality favors crack growth by void formation and coalescence over plastic shear deformation, i.e. shear lip ...
This research uncovers the plastic characteristics and underlying mechanisms in an Mg–Gd–Y alloy under a wide range of stress triaxiality conditions using crystal plasticity modeling. The study covers uniaxial tension, uniaxial compression, plane strain tension, plane strain compression, and shear. ...
The stress triaxiality is, besides the strain intensity, the most important factor that controls initiation of ductile fracture. In this study, a series of tests including upsetting tests, shear tests and tensile tests on 2024-T351 aluminum alloy providing clues to fracture ductility for a wide ra...
a· A formal statement for the blue seal is the same as the white seal from original manufacturer;[translate] a· Distribution list in the last time and this time.[translate] aThe strain and stress triaxiality corresponding to the failure point were estimated. The[translate]...
The stress triaxiality is, besides the strain intensity, the most important factor that controls initiation of ductile fracture. In this study, a series of tests including upsetting tests, shear tests and tensile tests on 2024-T351 aluminum alloy providing clues to fracture ductility for a wide ...
At high triaxiality, void growth induces softening of the material, which overtakes the intrinsic strain hardening of the matrix phase, leading to a maximum in the effective stress–strain relation for the porous material, followed by loss of ellipticity by means of dilatant shear localization bands...