1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS M ISO 6721 1 1:KS M ISO 6721 1:2012 2012 12 24 http:/www.kats.go.krKS M ISO 6721 1:2012 : ( ) ( ) SREAP ( ) : (http:/www.standard.go.kr) : :2002 11 30 :2012 12 24 2012-0751 : : ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , . KS M ISO 6721 1:2012 i ii 1 1
2、2 1 3 .1 4 8 5 10 6 11 6.1 .11 6.2 11 6.3 11 7 .11 8 .11 9 .11 9.1 11 9.2 11 9.3 11 9.4 .12 9.5 12 9.6 .12 10 .12 11 13 12 .13 A( ) .14 B( ) .19 20 KS M ISO 6721 1:2012 ii 2011 3 ISO 6721 1, Plastics Determination of dynamic mechanical properties Part 1: General principles . KS M ISO 6721 1:2012 1:
3、Plastics Determination of dynamic mechanical properties Part 1: General principles 1 KS M ISO 6721 . 1 . , . , , . , . 2 . . ( ) . KS M ISO 291, KS M ISO 295, KS M ISO 1268( ), KS M ISO 4593, KS M ISO 6721 2, 2: KS M ISO 6721 3, 3: ISO 293, Plastics Compression moulding of test specimens of thermopl
4、astic materials ISO 294(all parts), Plastics Injection moulding of test specimens of thermoplastic materials ISO 2818, Plastics Preparation of test specimens by machining 3 . KS M ISO 472, , KS M ISO 6721 1:2012 2 KS M ISO 472 . 3.1 M * (t) Aexp(i2ft) (t) Aexp i(2ft ) Pa . , A A , f , (3.5 1 ) , t .
5、 1 Pa . 2 E*, G*, K* L* ( 3 ). M* M iM (3.2 3.3 ) (1) i ( 1)1/2 1 1 . 3 G*, E*, K*, L* * 2 (* , * ). 4 1 2 , 0.5 0.3 0 0.4 . 1 . 1 1 2 K L E G . K L . 5 K , K(t) . 6 L . K L (G, L) (E, L) 1 2 . G (G, L) . 7 1 (3.4 ). 8 KS M ISO 6721 . , . 1 h . ( C 1, 2 ). 9 C* M* . M* (C*) 1(2) 22)()(iiCCCCMM+=+ (3
6、) KS M ISO 6721 1:2012 3 a) /2f(A A , f ) b) M, M , M* | M | 1 1 G E K G E G K E K G La , 1 2bGE3 KGKG3/1/+ KE31/1GL , G )1(2 +E)1(2)21(3+KKEE3/3 , E 2G(1 ) 3K(1 2 ) KGG3/13+LGLGG/1)3/41(3 Kc)21(3)1(2+G)21(3 E)1/3(3 EGG34GL , L 21)1(2G)21)(1()1(+E+1)1(3K1/3)1/4(EGEGG34GK +KEKEK9/1)3/1(+a3.1 6 b3.1 4
7、 c3.1 5 KS M ISO 6721 1:2012 4 3.2 M M* 1 b) . 1 Pa . 2 . 3 Et, Ef, Gs, Gto, K, Lc LW . 3.3 M 1 b) . 1 Pa . 2 1 . (3.2 ) 3 . , Et . 3.4 | M | . | M |2 (M )2 (M )2 (A/A)2(4) A, A: 1 Pa . 2 (M ), (M ), () | M | 1 b) . 3 . , | Et| . 3.5 ( 1 ). 1 (rad) . 2 (3.2 ) 3 . , t . 3.6 tan . tan M/M (5) KS M ISO
8、 6721 1:2012 5 : (3.5 ) 1 . 2 tan . (3.2 ) 3 . , tan t . 3.7 . ( 2 ). 2 3.8 X(t) ( 3 ), . X(t) X0exp( t)sin2 fdt(6) X0: 0 fd: : (3.9 ) KS M ISO 6721 1:2012 6 X , Xq q , X0 (6) . 3 3.9 , Xq 3 (6) . (: s 1). 3.10 2 ( 3 ), . ln(Xq /Xq 1)(7) Xq Xq 1: 2 1 . 2 . 3 fd . /fd(8) 4 tan . tan / (9) 5 ( ) ( B )
9、. Xoexp( t)KS M ISO 6721 1:2012 7 3.11 (LA) (DA) (RA) ( 4 A ). 4 ( - RA f , ) 3.12 fri 1 i 2 Hz . 3 . ( A ). - . , . . 3.13 fii f1 f2 . f1 f2 (RAh) i (RAMi) ( 4 ) RAh 2 1/2RAM 0.707RAM (10) 1 Hz . 2 fi (11) (tan ) . tan fi/fri (11) KS M ISO 6721 1:2012 8 - fi (11) ( A ). 4 . , , 4 I IV . 2 . ( 3 ).
10、4 . 5 . 2 ( , .) I II III IVa (sweep), b (excitation) / a A B (KS M ISO 6721 2 1 2 ). b . 3 ( ) Et Ef Gs Gto K Lc( ) LW KS M ISO 6721 1:2012 9 4 KS M ISO 6721 HzGtoIV 2 0.1 10 EfIII 3 10 1 000EfI 5 GtoI 7 EtI 4 GsI 6 10 3 100LcI 10 3 100EfI 10 3 10 EfII 3 60 1 , 2 3 KS M ISO 6721 1:2012 10 5 KS M IS
11、O 6721 ( 3 ) ( 2 ) EtEfGsGtoK LcLWI 4 5 6 7 8 I III 3 IV 2 5 5.1 ( ) (4. ). 5.2 , KS M ISO 6721 . 5.3 . ( , 100 300 ). . 1 . (9.5 ), 1 . ( ) 120 /h . 1 ( , ) 0.5 . 5.4 . 5.5 0.5 . . 5.6 . . , , 0.5 % (KS M ISO 4593 ). KS M ISO 6721 1:2012 11 6 6.1 ( , , ) . , . , . 6.2 KS M ISO 6721 . 6.3 , ( ) . (I
12、SO 293, KS M ISO 295 KS M ISO 1268 .) (ISO 2818 .) . (ISO 294 .) . 7 3 . 1 . 2 . 8 . KS M ISO 291 . 9 9.1 ( ), ( ) . 9.2 5 0.5 % . , 3 % . , . . 9.3 KS M ISO 6721 1:2012 12 KS M ISO 6721 . 9.4 . ( I), ( II IV) ( III)( 2 ). . . (1 2) /min 2 5 3 5 . III 10 . . - . - . . . . . 9.5 . . 9.6 , A . , . 1 H
13、z . , . , . , . , . , . 10 3 2 . , Ef(III)- KS M ISO 6721 1:2012 13 . , . . . KS M ISO 6721 . 11 KS M ISO 6721 . 12 . a) b) : , , . c) : d) e) f) g) h) I) , j) k) : , l) 10. m) 10. n) 10. KS M ISO 6721 1:2012 14 A ( ) A.1 , . DA RA . A.2 , DA f . DA(f) A.2.1 A.2.4 . A.2.1 DA “ ” DA0(f 0) , 2( 40 dB/ decade) ( A.1 ). 1 DA f 2 RA 1 2 . tan 0.6 . DAM RAM fRD frR , fn ( , tan 0
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