Mesh Dependence of True Stress-Strain Curves in Finite Element Analysis of Steel Structures

PDF

Authors
  1. Gannon, L.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
Finite element analysis is used to calculate true stress-strain curves using data from tensile coupon tests. An iterative process is used to determine the true stress-strain curve after necking begins. Finite element models of tensile coupons are created using 2D and 3D elements, and the mesh density is varied to evaluate the effect of element type and mesh density on strain localization and the true stress-strain curves that characterize the material behaviour. For both 2D and 3D elements, an exponential relationship between element size and true strain at fracture was observed. Results indicate that for a finite element model meshed with a particular element type of various sizes, a family of element size-dependent true stress-strain curves is necessary to accurately characterize material behaviour after necking begins.

Il y a un résumé en français ici.

Report Number
DRDC-ATLANTIC-TM-2011-283 — Technical Memorandum
Date of publication
01 Nov 2011
Number of Pages
50
DSTKIM No
CA037231
CANDIS No
536967
Format(s):
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: