Topic
Necking
About: Necking is a research topic. Over the lifetime, 5280 publications have been published within this topic receiving 113945 citations.
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TL;DR: In this paper, the effect of shear deformation and the superimposed hydrostatic pressure on the formability of magnesium alloy sheet is simulated in terms of the forming limit diagram (FLD).
35 citations
TL;DR: In this article, an iterative correction procedure using 3D finite element analysis (FEA) was carried out to determine more accurately the effective true stress-true strain curves of aluminum, copper, steel, and titanium sheet metals with various gage section geometries up to very large strains just prior to the final tearing fracture.
Abstract: An iterative correction procedure using 3D finite element analysis (FEA) was carried out to determine more accurately the effective true stress–true strain curves of aluminum, copper, steel, and titanium sheet metals with various gage section geometries up to very large strains just prior to the final tearing fracture. Based on the local surface strain mapping measurements within the diffuse and localized necking region of a rectangular cross-section tension coupon in uniaxial tension using digital image correlation (DIC), both average axial true strain and the average axial stress without correction of the triaxiality of the stress state within the neck have been obtained experimentally. The measured stress–strain curve was then used as an initial guess of the effective true stress–strain curve in the finite element analysis. The input effective true stress–strain curve was corrected iteratively after each analysis session until the difference between the experimentally measured and FE-computed average axial true stress–true strain curves inside a neck becomes acceptably small. As each test coupon was analyzed by a full-scale finite element model and no specific analytical model of strain-hardening was assumed, the method used in this study is shown to be rather general and can be applied to sheet metals with various strain hardening behaviors and tension coupon geometries.
35 citations
TL;DR: In this paper, an Al-(TiB2+TiC)p/6063 laminated composite was successfully prepared for the first time using accumulative roll bonding (ARB) process up to three cycles.
35 citations
TL;DR: In this paper, the fracture strain is defined as the strain at necking under uniaxial tension or the local strain at cracking initiation, and the results obtained on 250nm-thick aluminium films using a novel concept of micro and nano-machines allowing multiple loading configurations and geometries.
35 citations
TL;DR: In this paper, ductile fracture simulations are performed with large thin-walled steel structures employing four different fracture criteria that differently account low stress triaxialities and deformation history.
35 citations