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# 2d LJ crack simulation(ÎÊÌâµÄ»ù±¾³õʼ»¯)
dimension        2 #2ά·Ö×Ó¶¯Á¦Ñ§Ä£Äâ
boundary        s s p #x,y·½Ïò²»´æÔÚÖÜÆÚ±ß½çÌõ¼þ£¬z·½ÏòÖÜÆÚ±ß½çÌõ¼þ¡£

atom_style         atomic #Ô­×ÓÀàÐÍ£¨½ðÊô£©
neighbor  0.3 bin #½¨½üÁÚ±í²ÎÊý£¨rc+0.3£©bin±íʾΪ½üÁÚ±íÀàÐÍ¡£
neigh_modify  delay 5 #¼ä¸ô¶àÉÙÔØºÉ²½ÖØÐÂÐγɽüÁÚ±í


# create geometry ´´½¨³õʼ¼¸ºÎ¹¹ÐÎ
lattice  hex 0.93  #Ö¸¶¨¾§¸ñÀàÐÍ£¨¶þάhex£©ºÍ¾§¸ñ³£Êý
region  box block 0 100 0 40 -0.25 0.25  #¶¨ÒåÒ»¸öÇøÓò
create_box        5   box  #ÔÚÖ¸¶¨ÇøÓò½¨Á¢Ò»¸ösimulation box,5±íʾԭ×ÓÀàÐ͵ÄÖÖÀàÊý
create_atoms  1  box   #ÔÚsimulation boxÖд´½¨ÀàÐÍΪ1µÄÔ­×Ó£¨Ô­×ÓλÖóõʼ»¯£©

mass   1 1.0
mass  2 1.0
mass  3 1.0
mass  4 1.0
mass  5 1.0  #Ö¸¶¨µ¥¸öÔ­×ÓµÄÖÊÁ¿


# LJ potentials(Ö¸¶¨Ô­×Ó×÷ÓÃÊÆ)
pair_style        lj/cut 2.5       #Ö¸¶¨ljÊÆ£¬½Ø¶Ï°ë¾¶Îª2.5
pair_coeff * * 1.0 1.0 2.5    #Ö¸¶¨ljÊÆ²ÎÊý

# define groups£¨±ãÓÚ¼ÓÔØ£©
region  1 block INF INF INF 1.25 INF INF
group  lower region 1   #¶¨Òålower×飨±ãÓÚÊ©¼ÓÍâ¼ÓËÙ¶È£©
region 2 block INF INF 38.75 INF INF INF
group upper region 2  #¶¨Òåupper×飨±ãÓÚÊ©¼ÓÍâ¼ÓËÙ¶È£©
group boundary union lower upper #¶¨Òå×ܱ߽ç×é
group mobile subtract all boundary #¶¨Òå¿É¶¯Ô­×Ó×飨±ãÓÚͳ¼ÆÎ¶ȣ©


region                leftupper block INF 20 20 INF INF INF
region                leftlower block INF 20 INF 20 INF INF
group                leftupper region leftupper
group                leftlower region leftlower           #¶¨Òå×óÉÏ¡¢×óÏÂÔ­×Ó×飨±ãÓÚÖ¸¶¨ÁÑÎÆµÄ´æÔÚ£©

set                group leftupper type 2
set                group leftlower type 3
set                group lower type 4
set                group upper type 5                   #Ö¸¶¨Ô­×ÓÀàÐÍ£¨±ãÓÚÖ¸¶¨ÁÑÎÆµÄ´æÔÚ£©

# initial velocities³õʼ»¯ËÙ¶È
compute        new mobile temp     #¶¨ÒåζȵļÆË㣨¿É¶¯ÇøÓòÄÚͳ¼ÆÆ½¾ù£©
#compute new2 mobile stress/atom      #¶¨ÒåÔ­×ÓÓ¦Á¦µÄ¼ÆË㣨Õû¸öÇøÓò£©
velocity mobile create 0.01 887723 temp new   #°´Ö¸¶¨µÄζȣ¨0.01£©¼ÆËã·½·¨£¬³õʼ»¯Ô­×ÓµÄËÙ¶È
velocity upper set 0.0 0.3 0.0   #upperÔ­×Ó×éy·½ÏòµÄËÙ¶ÈΪ0.3
velocity mobile ramp vy 0.0 0.3 y 1.25 38.75 sum yes    #mobileÔ­×ÓµÄËÙ³õʼ¶È´Ó0µ½0.3ÏßÐԱ仯
# fixesÊ©¼ÓÔ¼Êø
fix        1 all nve
#nveϵ×۵Ļý·ÖËã·¨
fix        2 boundary setforce NULL 0.0 0.0
#±ß½çboundaryÉÏÁ¦Ìõ¼þ£¬¸Ö»¯Ô­×Ó£¬±ãÓÚ¼ÓÔØ£¡£¡


# runÔËÐмÆËã
timestep        0.003  #ʱ¼ä¼ä¸ô²½
thermo  200   #ÿ200²½Êä³öÈȶ¯Á¦Ñ§Í³¼ÆÁ¿
thermo_modify  temp new  #¼ÆËãζÈͨ¹ýnewָʾµÄ·½·¨¼ÆËã

neigh_modify exclude type 2 3  #Ô­×Ó2£¬3Ö®¼ä×÷ÓÃÈ¡Ïû£¨Ò²¾ÍÊÇͨ¹ý²»Ê¹ËûÃÇÔÚ½üÁÚ±íÖгöÏÖʵÏÖ£©
dump 1 all atom 500 dump.crack  #ÿ¸ô500²½½«Ô­×ÓÐÅϢдÈëÎļþdump.crack
dump 2 mobile custom 500 dump2.crack tag x y z c_new2[2]
run                5000   #½øÐÐ5000²½µÄÄ£Äâ



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Tanya_snail

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Tanya_snail

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ldj168168

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