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哥是传说

铁杆木虫 (正式写手)

[求助] elastic

下面是用vasp计算弹性常数,cubic立方体系c11得到的summary,怎么从这些数据拟合得到c11的值呢?

-0.012 -18.279909 -18.279885 -18.279880 -18.279878 -18.279879 -18.279879 -18.279879 -18.279879 -18.279879 -18.279879
-0.009 -18.280393 -18.279952 -18.279935 -18.279934 -18.279931 -18.279932 -18.279932 -18.279932 -18.279932 -18.279932
-0.006 -18.280538 -18.280178 -18.280168 -18.280169 -18.280165 -18.280167 -18.280166 -18.280166 -18.280166 -18.280166
-0.003 -18.280553 -18.280533 -18.280543 -18.280535 -18.280538 -18.280538 -18.280538 -18.280538 -18.280538 -18.280538
0.000 -18.288128 -18.281363 -18.281008 -18.281009 -18.281004 -18.281002 -18.281003 -18.281003 -18.281003 -18.281003
0.003 -18.281413 -18.281025 -18.281013 -18.281014 -18.281011 -18.281012 -18.281012 -18.281012 -18.281012 -18.281012
0.006 -18.281530 -18.281169 -18.281156 -18.281157 -18.281152 -18.281154 -18.281154 -18.281154 -18.281154 -18.281154
0.009 -18.281661 -18.281278 -18.281261 -18.281258 -18.281256 -18.281257 -18.281257 -18.281257 -18.281257 -18.281257
0.012 -18.281721 -18.281281 -18.281253 -18.281252 -18.281248 -18.281250 -18.281249 -18.281249 -18.281249 -18.281249
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calos818

木虫 (著名写手)

新人菜鸟

引用回帖:
2楼: Originally posted by 哥是传说 at 2011-09-28 14:34:41:
已解决

请问怎么解决的 这些数据代表啥意思
3楼2011-09-28 14:43:30
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困龙

金虫 (小有名气)

★
uuv2010(金币+1): 欢迎参加交流 2011-09-28 19:34:35
引用回帖:
3楼: Originally posted by calos818 at 2011-09-28 14:43:30:
请问怎么解决的 这些数据代表啥意思

呵呵,第一列应该是不同形变大小,最后一列是该形变下的体系总能。拟合总能和形变的曲线就可以了。个人理解。这个是很具体的问题,不做相应的研究,不需要知道的。
4楼2011-09-28 18:33:53
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哥是传说

铁杆木虫 (正式写手)

★
gzqdyouxia(金币+1): 谢谢提示 2011-09-30 11:19:57
引用回帖:
3楼: Originally posted by calos818 at 2011-09-28 14:43:30:
请问怎么解决的 这些数据代表啥意思

三楼说的没错,第一列是给处于平衡体系的一个形变的大小,后面的10列都是相应的应变能,2-10列是拟合过程,只有最后一列的能量有用。
5楼2011-09-30 09:35:43
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