ssnp166a

There is a validation test in Code-Aster "ssnp166a" where a notched beam under three point bending is simulated using plain strain and cohesive zone modeling. I ran this test and produced load vs time curve. ( Please see "ssnp166a" folder at yadi.sk/d/MaGVVrwGoyMFj ) Next, using GMSH, I produced a mesh file which is almost similar to the original file given with the test. Other than mesh file I kept every thing else same and again produced the load vs time plot. ( Please see "myssnp166a" folder at yadi.sk/d/mtA-mAuGoyLr4 ) The two curves are drastically different. I'll be highly obliged if someone can tell me the source of this discrepancy. Thank you.