Dear All,
i tried to simulate both loading and unloading process during nano indentation. Part of both input and log script are mentioned below for your reference. The forces measured during loading “30-stepdt0.5” (30 angstrom to 25 angstrom) was fine where as after unfix command indentation is not following the variable z equal “25+stepdt0.5” (25 angstrom to 30 angstrom) rather it is following 30+stepdt0.5 (30 angstrom to 35 angstorm ) , hence showing zero force by the indenter. Kindly, suggest how the indentation will occur just after loading ?
loading :
variable z equal “30-stepdt0.5” (30 =z coordinate +indenter radius(10 angstorm))
fix 3 mobile indent 10.0 sphere 40 40 v_z 10.0 units box
…
unloading :
unfix 3
variable z equal “25+stepdt0.5”
fix 4 mobile indent 10.0 sphere 40 40 v_z 10.0 units box
.
.
.
30.1285 0 0 0
10500 210.22726 30.25 0 0 0
11000 212.04907 30.5 0 0 0
11500 203.71086 30.75 0 0 0
12000 212.6003 31 0 0 0
12500 209.50829 31.25 0 0 0
13000 200.34148 31.5 0 0 0
13500 211.66192 31.75 0 0 0
14000 196.25385 32 0 0 0
14500 210.45152 32.25 0 0 0
15000 214.95019 32.5 0 0 0
15500 218.51511 32.75 0 0 0
16000 210.86573 33 0 0 0
16500 219.24366 33.25 0 0 0
17000 212.23266 33.5 0 0 0
17500 204.80275 33.75 0 0 0
18000 224.66105 34 0 0 0
18500 203.16825 34.25 0 0 0
19000 208.72892 34.5 0 0 0
19500 212.75782 34.75 0 0 0
20000 207.28187 35 0 0 0
20257 211.36393 35.1285 0 0 0
thank you in advance
with regards
Arun