It shows that he results of the finite element model based on the modified stress-strain curve are in good agreement with the experimental results, the cross-sectional analysis method based on the 3D-DIC technique is verified. This method may be applied to ...
Application of the hydroforming strain- and stress-limit diagrams to pre- dict necking in metal bellows forming process. Int J Adv Manuf Tech 2010; 46(5-8): 551-561.Hashemi R, Faraji G, Abrinia K, Dezaji FA (2010) Application of the hydroforming strain- and stress-limit diagrams to ...
摘要: Triaxial state of stress is usually generated in the necked zone because of neck geometry, and as a consequence proper correction of true tensile stress–strain curve after necking is mandatory...关键词: correction factor digital image correlation finite element analysis necking true stress–st...
The procedure compensates for the combined effects of curvature and nonlinear strain path that occur during these tests, using measurements recorded by digital image correlation (DIC) throughout the deformation history of the point on the test specimen that eventually necks. The severity of forming ...
ficmaximum.Atthispointthetestsamplebeginstoneck.Thestateofstresschangesgraduallyfromthesimpleuniaxialtensiontoacompli-catedconditionoftriaxialstressforaroundbarorofbiaxialstressforathinstrip.Becausetheonsetofneckingdestroystheuniaxialstateofstressitisimpossibletodetermineauniaxialtruestress-strainrelationbythestandard...
3. Necking stress increases with aging time and an yield point appears in a further drawing after the necking. It suggests the formation of stronger intermolecular bonds by aging. 4. A very small increase is observed in density. The... Y Mitsuishi,Y Kuroda - 《Fiber》 被引量: 1发表: 20...
Application of the hydroforming strain- and stress-limit diagrams to predict necking in metal bellows forming processdoi:10.1007/s00170-009-2121-9R HashemiGhader FarajiKaren AbriniaAhmad Dizaji
Only a qualtitative picture of the stress-strain relations during necking can be given.When the loads on the testbar are directly transmitted by a liquid, the uniform strains at necking are constants, which are different, however, for axial and radial necking. The stress-strain relations during...
Finite Elements in Analysis & DesignS. Muhammad and P.-Y. B. Jar, "Determining stress-strain relationship for necking in polymers based on macro deformation behavior," Finite Elem. Anal. Des., vol. 70-71, pp. 36-43, Aug. 2013.
True stressFlow stressThe effect of the necking combined to that of the strain rate is analysed in dynamic split Hopkinson bar (SHTB) tests, by both experiments and finite elements. Experiments from the literature by Noble et al. are considered here together with other tests ran at the ...