VCCT delamination using plane182 with plane stress with thickness
I faced an issue while validating the DCB test for delamination using Ansys plane 182 plane stress option using VCCT.
-->The critical load as predicted by ansys doesn't seem to match with the expected values: It under-predicts the critical load for delamination.
-->Also, the initial slope of the force-deflection before the failure initiates also appears to be not matching.
I tried refining the mesh and using higher order but the issue still persists.
I have attached the input file: dcb.dat to reproduce this issue. Also attached is the image of the various simulated results.
The parameters of DCB are:
L=200 !* length
dh=40 !* total thickness
a0=100 ! pre-crack length
nel=200 !* no.elements along length
neh=40 !* no.elements along thick
emod=2.0e+05 ! E
thick=10 ! width
g1c=0.9628 !* critical energy-release rate
pratio=0.3 ! *Proisson ratio
Please let me know your comments on observed results and suggestions. also, may i know if there is any validation problem to verify using plane stress option.