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Alehmn

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[ÇóÖú] LAMMPS ·Ö×Ó¶¯Á¦Ñ§¼ÆËãÄÉÃ׸߷Ö×Ó¸´ºÏÌåϵÀ­ÉìÇúÏßʱÓöµ½µÄÎÊÌâ ÒÑÓÐ1È˲ÎÓë

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Ö÷ÒªÊÇΪÁ˼ÆËãÌåϵµÄstress-strain behavior , ʹºÐ×ÓÔÚx ·½ÏòÀ­³¤£¬ÎªÁËÌå»ý²»±äÄÇôy ºÍz·½Ïò°´Àí˵Ӧ¸ÃÒ²ÒªËõС£¬µ«ÊÇͬʱΪÁË׼ȷ¼ÆËãÔÚx·½ÏòµÄÊÜÁ¦¾Í²»µÃ²»±£³ÖyºÍz·½ÏòµÄѹǿΪ0£¬ÈçÏÂÊÇÎÒµÄinÎļþ£¬ÔËÐкóÔÚ×îºóµÄ15000¿ªÊ¼Ê±±¨´í£º
ERROR: Cannot use fix npt and fix deform on same component of stress tensor

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# VARIABLES
variable fname index PE.data
variable simname index PE
# in.file
dimension               3   
boundary               p p p
units            lj
atom_style           molecular
neighbor               0.3 bin
neigh_modify           delay 2 every 2 one 20000 page 1000000
special_bonds    lj 1.0 1.0 1.0
  
read_data       PE.data
  
bond_style      fene
bond_coeff      1 30.0 1.5 0.0 1.0
bond_coeff      2 30.0 1.5 0.0 1.0
angle_style     cosine
angle_coeff     1    10.00000   
angle_coeff     2    10.00000   
pair_style      lj/expand   2.500000   
pair_modify     shift yes
pair_coeff      1*2 1*2 1.0 1.0 0.0 1.12246
pair_coeff      1*2 3  1.000  1.00  2.00  2.50
pair_coeff      3 3 3.0 1.0   4.000000       1.122460   
  
group           chain type 1 2
group           np type 3
  
fix             1 all nve/limit 0.0005
  
thermo                   50000
dump                       1 all custom 50000 dump.all.lammpstrj id type x y z
  
timestep              0.005
run             50000
write_restart run1.restart

unfix           1
velocity        chain create 2.0       733994 dist gaussian

fix             3 all nvt temp 2.0 1.0 50.0
run             1500000
fix             3 all nvt temp 1.0 1.0 50.0
run             1500000
unfix     3
variable e equal "(lx-35.0)/35.0"
variable p equal "((pxx+pyy+pzz)/3-pxx)*1.5"
fix             4 all npt temp 1.0 1.0 50 y 0 0 1000 z 0 0 1000 drag 2
fix                5 all deform 1 x scale 2.0 y volume z volume
fix def1 all print 100 "${e} ${p}" file ${simname}.def1.txt screen no
thermo_style        custom step temp pxx pyy pzz lx ly lz epair ebond eangle vol v_e v_p
thermo          300
timestep        0.005
run             15000
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brucefan

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Alehmn

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2Â¥: Originally posted by brucefan at 2018-04-12 03:17:23
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3Â¥2018-04-12 14:41:40
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brucefan

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4Â¥2018-04-12 23:46:03
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Alehmn

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ÒýÓûØÌû:
4Â¥: Originally posted by brucefan at 2018-04-12 23:46:03
ÓÃfix npt Ö¸¶¨´¹Ö±·½ÏòµÄѹǿ¼´¿É¡£À­Éì·½ÏòµÄѹǿ²»¿ÉÔÙÖ¸¶¨¡£

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panhui326

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Alehmn

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ÒýÓûØÌû:
6Â¥: Originally posted by panhui326 at 2019-08-10 16:36:36
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