نتایج جستجو برای: localized necking
تعداد نتایج: 103908 فیلتر نتایج به سال:
Abstract The forming limit diagram (FLD) of high-purity niobium sheets used for the manufacturing superconducting radiofrequency (SRF) cavities is presented. Marciniak (in-plane) test was with blanks a thickness 1 mm and blank carriers annealed oxygen-free electronic (OFE) copper. A high formability measured, an approximate true major strain at necking plane 0.44. likely caused by its rate sens...
To enable an accurate simulation of manufacturing processes, it is essential to characterise and model the mechanical behaviour sheet metals up large deformations. However, after onset necking, deformation becomes highly heterogeneous stress triaxial. By combining full-field measurements inverse methods, possible calibrate beyond necking. A possibility use virtual fields method, by extending it...
In this paper, we have modified the stress integration scheme proposed by Choi and Yoon [1]; which is based on numerical approximation of yield function gradients, to implement in finite element code ABAQUS three elastic isotropic, plastic anisotropic constitutive models with yielding described Yld2004-18p [2], CPB06ex2 [3] Yld2011-27p [4] criteria, respectively. We developed both VUMAT UMAT su...
Purpose Although ultrasound shows great potential for aiding assessment of LS disease activity, its use has been limited because both image acquisition and interpretation are operator dependent. To facilitate evaluating and to standardize interpretation of jLS ultrasound scans, we generated a scoring measure for evaluating echogenicity and vascularity differences (U-DA, Ped Rheum 2010;8:14). Ob...
forming limit curves are used as a parameter in finite element analysis to control the material's level of formability. in this research, forming limit diagram (fld) of ss304l sheet was obtained by abaqusfinite element software. in practice, the experimental determination of a forming limit curve is a very time-consuming procedure which requires special and expensive equipment. forming limit di...
The anisotropic material behaviour of a recrystallized AA2198 Al-Cu-Li alloy in T3 and T8 conditions was assessed by proportional loading uniaxial-tension specimens rolling (L), transverse (T) diagonal (D) orientations. width longitudinal strains were measured to quantify plastic anisotropy. Notched-tension samples tested L T directions. showed weak anisotropy terms stress strain curves moderat...
Forming limit curves are used as a parameter in finite element analysis to control the material's level of formability. In this research, forming limit diagram (FLD) of SS304L sheet was obtained by ABAQUSfinite element software. In practice, the experimental determination of a forming limit curve is a very time-consuming procedure which requires special and expensive equipment. Forming limit di...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید