Heng Li

TL;DR: In this paper, several criteria under the categories of uncoupled damage and coupled damage were investigated to determine their reliability in ductile failure prediction in metal plastic deformation, including the continuum damage mechanics (CDM)-based Lemaitre model and the Gurson-Tvergaard-Needleman (GTN) model, and the two categories of criteria were coded into finite element models based on the unconditional stress integration algorithm in the VUMAT/ABAQUS platform.

TL;DR: In this article, a unified continuum-based discontinuous (CBD) framework is constructed, in which SSM and SIM are introduced to capture the distorted shape of the yielding, and an interpolation approach is adopted to smoothly present the nonlinear evolution of the distorted plasticity in the full stress space.

TL;DR: For contact dominated rotary-draw-bending of thin-walled tube, friction role should be focused to achieve precision bending under small bending radii ratio (Rd/D) as discussed by the authors.

TL;DR: In this article, the role of push assistant loading (PAL) in rotary draw bending of thin-walled tube with small bending radii is investigated, where the axial pushing force is applied to the tube to control the flow states of tube materials.

TL;DR: In this paper, the deformation behaviors of thin-walled tube NC bending with large diameter D/t (50.0-87.0) and small bending radius Rd/D (1.0 -2.2) are explored via a series of reliable 3D-FE models under ABAQUS platform.