1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS M ISO 6721 8 8: KS M ISO 6721 8:2008 2008 10 28 http:/www.kats.go.krKS M ISO 6721 8:2008 : ( ) ( ) () ()SK () ( ) : (http:/www.standard.go.kr) : : 2003 11 25 : 2008 10 28 2008-0705 : : ( 025097301) (http:/www.kats.go.kr). 10 5 , . KS M ISO 6721 8:2008 8:
2、 Plastics Determination of dynamic mechanical properties Part 8: Longitudinal and shear vibration Wave-propagation method 1997 1 ISO 6721 8, Plastics Determination of dynamic mechanical properties Part 8: Longitudinal and shear vibration Wave-propagation method , . 1 0.5 5 MHz L G . 0.01 200 GPa , 1
3、 MHz 0.1 . . 50 mm20 mm5 mm , . (10.5 ) . 2 . . ( ) . KS M ISO 1183, KS M ISO 6721 1, 1: 3 KS M ISO 6721 1 KS M ISO 6721 8:2008 2 3.1 0 . KS M ISO 6721 1 5 . 3.2 3.3 3.4 . . . 4 . . . . 2 . . . ( ) . . 2 , . . . 5 5.1 . 2 . 5.1.1 A: KS M ISO 6721 8:2008 3 1 . 2 , T R . . 1 ms . . 0.5 T R . . . . 1 b
4、) . ( 1 ). 1 , 2 . KS M ISO 6721 8:2008 4 a) b) 1 1 5.1.2 B: 2 a) . 1 . 2 . . 2 b) . ( 1 ). / KS M ISO 6721 8:2008 5 a) b) 1 2 5.2 3 4 . 3 . . 2 2 , , . / KS M ISO 6721 8:2008 6 3 5.3 0.5 % 2 ( 2 ). 2 . , mm 1 . . 5.4 KS M ISO 6721 1 5.5 3 3 2 . , . ( ) KS M ISO 6721 8:2008 7 0.5 K , 0.2 K . 6 KS M
5、ISO 6721 1 6. 6.1 . . d 0.2 % . (4.4 ), 3 . (m) f(Hz) vL(ms 1) . fvL= (1) 6.2 KS M ISO 6721 1 6.2 7 KS M ISO 6721 1 7. 8 KS M ISO 6721 1 8. 9 9.1 KS M ISO 6721 1 9.1 9.2 3 . 0.5 % . 9.3 9.3.1 A: . 3 0 . ( 4 ). KS M ISO 6721 8:2008 8 4 (multiphase) . . . 0.5 . . . ( 5 ) . 5 . . . . 0 , . 9.3.2 B: 2(a
6、) 2(b) . . 9.3.1 . . 0.5 % . ( 4 ). . . 9.3.3 KS M ISO 1183 0.5 % . 10 10.1 d(m) tL, tT(s) tR(s) t2L, t2T(s) I KS M ISO 6721 8:2008 9 R vL(ms 1) vT(ms 1) vW(ms 1) (kgm 3) 10.2 vL 10.2.1 A: 1(a) . )(LRWVLWttvddv= (2) 1 1(b) . )(22LRwVLWttvddv= (3) 2 . LL2L2ttdv= (4) 10.2.2 B: 2(a) . RLLttdv= (5) 1 2(
7、b) . RLL2ttdv= (6) 2(a) . LL2L2ttdv= (7) 10.3 vT 10.3.1 A: 1(a) . KS M ISO 6721 8:2008 10 RttvIRddvcos)()cos(TRWVTw= (8) )(cossintanTRWttvIdIdR= (9) 1 1(b) . RttvIRddvcos)()cos(22TRWVTw= (10) )(cos2sin2tanTRWttvIdIdR= (11) 10.3.2 B: 2(a) . RTTttdv= (12) 1 2(b) . RTT2ttdv= (13) 2 . TT2T2ttdv= (14) 10
8、.4 L . 2LvL = (15) G . 2TvG = (16) E . GLGLGE=)43( (17) K . 3/4 GLK = (18) . )(22GLGL= (19) KS M ISO 6721 8:2008 11 )(222T2L2T2Lvvvv= (20) 10.5 . vL vT . (1) (15) (16) (20) . . . I (8) (10) R vT . vT R G (16) L E , K , (17) (20) . 11 . . 12 . a) b) m) KS M ISO 6721 1 12. 8: 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS M ISO 6721 8:2008KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Plastics Determination of dynamic mechanical properties Part 8: Longitudinal and shear vibration Wave-propagation method ICS 83.080.01
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