瀹炵敤鏍囧噯鏂囨。
鏂囨澶у叏
鏉愭枡鏈瀯妯″瀷鍙婄紪绋?/p>
-ABAQUS-UMAT
鏉愭枡鏈瀯妯″瀷鍙婄紪绋嬪疄鐜帮細绠�浠?/p>
1
銆佷粈涔堟椂鍊欑敤鐢ㄦ埛瀹氫箟鏉愭枡锛?/p>
User-defined
material,
UMAT
锛夛紵
寰堢畝鍗曪紝褰?/p>
ABAQUS
娌℃湁鎻愪緵鎴戜滑闇�瑕佺殑鏉愭枡妯″瀷鏃躲�傛墍浠ワ紝鍦ㄥ喅瀹氳嚜宸卞畾涔変竴绉嶆柊鐨勬潗鏂欐ā鍨嬩箣鍓嶏紝鏈�濂藉
ABAQUS
宸茬粡鎻愪緵鐨勬ā鍨嬪績涓湁鏁帮紝骞?/p>
涓斿敖閲忎娇鐢ㄧ幇鏈夌殑妯″瀷锛屽洜涓鸿繖浜涙ā鍨嬪凡缁忕粡杩囪缁嗙殑楠岃瘉锛屽苟琚箍娉涙帴鍙椼�?/p>
2
銆佸ソ瀛﹀悧锛熼渶瑕佸摢浜涘熀纭�鐭ヨ瘑锛?/p>
鍏堢湅涓�涓?/p>
ABAQUS
鎵嬪唽锛?/p>
ABAQUS
Analysis
User's
Manual
锛夐噷鐨勪竴娈佃瘽锛?/p>
Warning:
The
use
of
this
option
generally
requires
considerable
expertise.
The
user
is
cautioned
that
the
imple
mentation
of
any
realistic
constitutive
model
requires
extensive
development
and
testing.
Initial
testing
on
a
s
ingle
element
model
with
prescribed
traction
loading
is
strongly
recommended.
浣嗚繖骞朵笉鎰忓懗鐫�闈炲姏瀛︿笓涓氾紝鎴栬�呭姏瀛﹀熀纭�鐭ヨ瘑涓嶅緢涓板瘜鑰呭氨鍙兘鏈涙磱鍏村徆锛屽洜涓烘垜浠殑浠诲姟涓嶆槸寮�鍙戜竴濂楀畬鏁寸殑鏈夐檺鍏冭蒋浠讹紝鑰屽彧鏄彁渚涗竴涓弿
杩版潗鏂欏姏瀛︽�ц兘鐨勬湰鏋勬柟绋嬶紙
Constitutive
equation
锛夎�屽凡銆傚綋鐒讹紝鏈�鍩烘湰鐨勪竴浜涙蹇靛拰鐭ヨ瘑杩樻槸瑕佸叿澶囩殑锛屾瘮濡?/p>
搴斿姏
(stress),
搴斿彉锛?/p>
strain
锛夊強鍏跺垎閲忥紱
volumetric
part
鍜?/p>
deviatoric
part
锛涙ā閲忥紙
modulus
锛夈�佹硦鏉炬瘮
(Poisson
鈥?/p>
s
ratio)
銆佹媺缇庡父鏁?/p>
(Lame
constant)
锛涚煩闃电殑鍔犲噺涔橀櫎鐢氳嚦姹傞�嗭紱杩樻湁涓�浜涢珮绛夋暟瀛︾煡璇嗗绉垎銆佸井鍒嗙瓑銆?/p>
3
銆?/p>
UMAT
鐨勫熀鏈换鍔★紵
鎴戜滑鐭ラ亾锛屾湁闄愬厓璁＄畻锛堝閲忔柟娉曪級鐨勫熀鏈棶棰樻槸锛?/p>
宸茬煡绗?/p>
n
姝ョ殑缁撴灉锛堝簲鍔涳紝搴斿彉绛夛級
锛岋紱
鐒跺悗缁欏嚭涓�涓簲鍙樺閲?/p>
,
璁＄畻鏂扮殑搴斿姏
銆?/p>
UMAT
瑕佸畬鎴愯繖涓�璁＄畻锛屽苟瑕佽绠?/p>
Jacobian
鐭╅樀
DDSDDE(I,J)
=
銆傛槸搴斿姏澧為噺鐭╅樀锛堝紶閲忔垨璁告洿鍚堥�傦級锛?/p>
鏄簲鍙樺閲忕煩闃点�?/p>
DDSDDE(I,J)
瀹氫箟浜嗙
J
涓簲鍙樺垎閲忕殑寰皬鍙樺寲瀵圭
I
涓簲鍔涘垎閲?/p>
甯︽潵鐨勫彉鍖栥�傝鐭╅樀鍙奖鍝嶆敹鏁涢�熷害锛屼笉褰卞搷璁＄畻缁撴灉鐨勫噯纭�э紙褰撶劧锛屼笉鏀舵暃鑷劧寰椾笉鍒扮粨鏋滐級銆?/p>
4
銆佹�庢牱寤虹珛鑷繁鐨勬潗鏂欐ā鍨嬶紵
鏈瀯鏂圭▼灏辨槸鎻忚堪鏉愭枡搴斿姏搴斿彉锛堝閲忥級鍏崇郴鐨勬暟瀛﹀叕寮忥紝涓嶆槸鍑┖鎯宠薄鍑烘潵鐨勶紝鑰屾槸鏍规嵁瀹為獙缁撴灉浣滃嚭鐨勫悎鐞嗗綊绾炽�傛瘮濡傚寮规�ф潗鏂欙紝瀹為獙鍙?/p>
鐜板簲鍔涘拰搴斿彉鍚屾绾挎�у闀匡紝鎵�浠ョ敤涓�涓畝鍗曠殑鏁板鍏紡鎻忚堪銆備负浜嗚В閲婂脊濉戞�ф潗鏂欑殑瀹為獙鐜拌薄锛屽張鎻愬嚭浜嗕竴浜涘脊濉戞�фā鍨嬶紝骞剁敤鏁板鍏紡琛ㄧず鍑?/p>
鏉ャ�?/p>
瀵瑰悇鍚戝悓鎬ф潗鏂欙紙
Isotropic
material
锛?/p>
,
缁忓父閲囩敤鐨勫姙娉曟槸鍏堢爺绌舵潗鏂欏崟鍚戝簲鍔?/p>
-
搴斿彉瑙勫緥锛堝鍗曞悜鎷変几銆佸帇缂╄瘯楠岋級锛屽苟鐢ㄤ竴鏁板鍏紡鍔犱互
鎻忚堪锛岀劧鍚庢妸璁茶瑙勫緥鎺ㄥ箍鍒板悇搴斿姏鍒嗛噺銆傝繖鍙仛鈥滄硾鍖栤�?/p>
(generalization)
銆?/p>
5
銆佷竴涓畬鏁寸殑渚嬪瓙鍙婅В閲?/p>
涓嬮潰杩欎釜
UMAT
鍙栬嚜
ABAQUS
鎵嬪唽锛屾槸涓�涓敤浜庡ぇ鍙樺舰涓嬬殑寮瑰鎬ф潗鏂欐ā鍨嬨�傚笇鏈涙垜鐨勬敞閲婅兘甯姪鍒濆鑰呯悊瑙ｃ�傞渶瑕佷簡瑙?/p>
J2
鐞嗚銆?/p>
SUBROUTINE
UMAT(STRESS,STATEV,DDSDDE,SSE,SPD,SCD,RPL,DDSDDT,
1
DRPLDE,DRPLDT,STRAN,DSTRAN,TIME,DTIME,TEMP,DTEMP,PREDEF,DPRED,
2
CMNAME,NDI,NSHR,NTENS,NSTATV,PROPS,NPROPS,COORDS,DROT,
3
PNEWDT,CELENT,DFGRD0,DFGRD1,NOEL,NPT,LAYER,KSPT,KSTEP,KINC)
STRESS--
搴斿姏鐭╅樀锛屽湪澧為噺姝ョ殑寮�濮嬶紝淇濆瓨骞朵綔涓哄凡鐭ラ噺浼犲叆
UMAT
锛涘湪澧為噺姝ョ殑缁撴潫搴旇淇濆瓨鏇存柊鐨勫簲鍔涳紱
STRAN--
褰撳墠搴斿彉锛屽凡鐭?/p>
銆?/p>
DSTRAN
鈥斿簲鍙樺閲忥紝宸茬煡銆?/p>
STATEV--
鐘舵�佸彉閲忕煩闃碉紝鐢ㄦ潵淇濆瓨鐢ㄦ埛鑷繁瀹氫箟鐨勪竴浜涘彉閲忥紝濡傜疮璁″鎬у簲鍙橈紝绮樺脊鎬у簲鍙樼瓑绛夈�傚閲忔寮�濮嬫椂浣滀负宸茬煡閲忎紶鍏ワ紝澧為噺姝ョ粨鏉熷簲璇?/p>
鏇存柊锛?/p>
DDSDDE=
銆傞渶瑕佹洿鏂?/p>
DTIME
鈥旀椂闂村閲?/p>
dt
銆傚凡鐭ャ�?/p>
NDI
鈥旀搴斿姏銆佸簲鍙樹釜鏁?/p>
,
瀵逛笁缁撮棶棰樸�佽酱瀵圭О闂鑷劧鏄?/p>
3
锛?/p>
11,22,33
锛夛紝骞抽潰闂鏄?/p>
2(11,22)
锛涘凡鐭ャ�?/p>
NSHR
鈥斿壀搴斿姏銆佸簲鍙樹釜鏁帮紝涓夌淮闂鏃?/p>
3(12,13,23)
锛岃酱瀵圭О闂鏄?/p>
1(12)
锛涘凡鐭ャ�?/p>