NiTi形状记忆合金的拉伸实验与物理模型_英文_

s: by h 10072026); h 0120042004 Z W A N G X X K e(A ry fo r Sm 29 N 210016, P. R. Ch T he iT i w by A m is to of ry ) w N um (1) a of on m p w w m ( rm em T he M A w is h ly (2) no iT iw (3) by in w ; 81 D en t D: 100521120 (2004) 0420267205m em o ry s) be w to of to p t re se of no le m of rm fo b w m 1- 3 . Bu t it lt to a le m fo rm r M A ex in cu w of ts en A m in th is 4- 11 , bu t is a m Am n s M A , T 4 ,L 5 6 m by m bu t m is t qu to u i w T fu ld be th is a m is p cu iT iw en t m T he m is in w h iT iw It is n m in s of u cu M A w at s M u in iT w p n te t i, 15 W cu t in to p a 50 T fo r p M T en t n te T p le in an en 2004 T A o l. 21 N o. 4n 1.F 1 le in an M m p M A , lu s w m rm F 2 s of cu iT w at t It be of w un o ex m rm by cu iT i w =313 K as an p T he en re is 0 C at 0 C, sm f s. T he p le is in a s. It be tw o p on cu 2. T he p co w w 19 m rm by It is no no le iT i w b l m is lt to a su le m fo r r M A cu w of ts en D a)(b)F 2 T M A at p cu in to m p le en ts to m cu T en t is n 3,w po in t A rm po in t C to Rs rm r rm 3 T yp is w n m k m ts in m s o i. e, E= 0. Fo r p m 1) T ju st tw o k of m O ne m fo r rm A o l. 21o of m s up of rm r ( 0) w v + at am om en t; o m st rm of m rm Er,w v - = 1- v + at a m om en t. H to of a N iT i w to be by v + v - (2v + - 1) )w is m s of iT i w in in m 2)W is on ly of m ak fo r rm cu a N iT i w is po en ts in to l k k of en of e rm r e m lu s E , o r t k of en t of t rm se k of en ts a am t of n (i) , en e rm v i+ e in T hu 1n (i) (2) 1 + (3)L = 1n (i) N l01n (i) 4)w li of a en t, L to of en i of a en t k (2v i+ - 1) 5)To of en ts be L - N 1n (i)N 6)D (i) = n (i)N w 1L(i) = 1 (7)(5- 7) 21L(i) v i+ - 1 8)W to (7, 8) e (R) 1 (9)E= 2) v + (R) 1 10)w 1s ls te of rm in (10) is en sh ip w ax to (R) is as fo s. A to (10) E(R) = 2) ) 1 11)F q. (9) , (R) 1 - (R) 12)q. (12) in q. (11) , q. (11) w , ) = E E (R) - 1E 3)213 er l 1s te co to po in t on cu to po in t. L be m lu s iT i w on cu T hu s (10, 13)be o. 4 et T iT i E= 2) v + (R) 1 2) v + (R) 1 R - 4)L(R) =E E (R) - 1E R E (R) - 1E R 5)Fo r p v + (R) = 1, o E , Er (R) be O n,ob u s by p q. (14). R n 4. It be cu in en t w en a)(b)F 4 N um ) W m ( , rm em a of on m p M A r, iT i w is h ly 2) T no no le iT i w b 3) on en t m m 2E iT i w fo r u u cu in en tw en 1 A. T he n of m J s 1993, 4 (1): 4- 12. 2 Sm m of 1st . T T 1996 (h 3 T Sm m D 1997 ( 4 T . A of ry rJ . T 1986, 18 (3): 2515 L , A. O fo r m . s 1990, 1 (4): 207- 234. 6 B C, H S. of m ry J . s 1996, 7 (1): 108- 118.7 W G, , M i S. m m fo r sm s. I. ry . 1998, 33 (15):3763- 3783.8 Ro m in M A J . T , 1999, 121 (1): 86- 92. 9 , L C. T po M A s T . 1999, 37 (9): 1089- A o l. 21 10 B . R of m of m J . A pp 1997, 50 (11): 629- 645.11 . D m of ry . s 1996, 7 (1): 71.N iT i 形状记忆合金的拉伸实验与物理模型胡自力 , 王鑫伟 , 熊克(南京航空航天大学智能材料与结构航空科技重点实验室 , 南京 , 210016, 中国 )摘要 : 根据 N iT i 丝的拉伸实验结果 , 基于滞后元方法 , 建立了拉伸状态下应力 2应变曲线的唯象物理模型 , 并进行了数值模拟。研究结果表明 : (1) 丝在马氏体相变 ,特别是 R 相变时出现一系列物理、力学性质的异常变化 ,其应力 2应变关系呈现高度非线性 ; (2) 在 N iT i