1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS M ISO 17281 (1 m/s) (GIC KIC)KS M ISO 17281: 2007 2007 10 30 http:/www.kats.go.krKS M ISO 17281: 2007 : ( ) ( ) ( ) ( )SK ( ) ( ) : (http:/www.standard.go.kr) : :2007 10 30 20070894 : : ( 025097 301) (http:/www.kats.go.kr). 7 5 , . KS M ISO 17281: 2007 (1
2、 m/s) (GIC KIC) Plastics Determination of fracture toughness (GICand KIC) at moderately high loading rates(1 m/s) 2002 1 ISO 17281, Plastics Determination of fracture toughness (GICand KIC) at moderately high loading rates(1 m/s) , . 1 1 m/s (LEFM) ( I) . KS M ISO 13586 KS M ISO 13586 . . , , . , .
3、( ) . 0.1 m/s(10 ms ) , KS M ISO 13586 . 1 m/s (1 ms ), . KS M ISO 13586 , . m/s (1 ms ) , , . KS M ISO 13586 , . KS M ISO 13586 . , , . , KS M ISO KS M ISO 17281: 2007 13586 . KS M ISO 13586: 2007 6.1 8.1 “ ” . 2 . . ( ) . KS M ISO 13586: 2007, (GIC KIC) (LEFM) 3 , KS M ISO 13586 . 4 4.1 KS M ISO 1
4、3586 , 3 ( SENB .) (CT .) . 1 . , , KS M ISO 13586: 2007 4. . 4.2 4.2.1 KIC KS M ISO 13586 , KIC . a 0.45 a/w 0.55 . , KIC 5 . 4.2.2 GIC KS M ISO 13586 , GIC . SENB 0.20 a/w 0.70 , CT 0.40 a/w 0.75 , 15 . KIC 0.45 a/w 0.55 5 . 10 . SENB 6 0.20 a/w 2 KS M ISO 17281: 2007 0.45 , 4 0.55 a/w 0.70 , CT 3
5、 0.40 a/w 0.45 , 7 0.55 a/w 0.70 . 4.3 KS M ISO 13586: 2007 5.6 . 5 5.1 . 10 % (6.1 ). 5.2 1 m/s . , . 3 KS M ISO 17281: 2007 a) SENB b) CT 1 4.1 6.2 ( , ) . , tf 8.1 . , . ( , 1 ms) , ( ) . , , ( , ) . , tf . 5.3 KS M ISO 13586: 2007 5.5 5.7 . 6 4 KS M ISO 17281: 2007 6.1 ( , , ) . ( , ) , . , 10 %
6、 . 6.2 (rig) , 3 (SENB) (anvil) . KS M ISO 13586: 2007 4. . 3 (SENB ) , ( , ) . , . 6.3 / KIC . , GIC . , . . ( .) 1 m/s 100 N ( 2 ), . 20 % . , 1/200 . , 200 . 7 7.1 . . . . “ ” . 5 KS M ISO 17281: 2007 , F , t a 2 / 7.2 . . “ ” . ( , ) . (SENB) , . , 0.05 mm . 3 0.1 mm . (CT) , . . 7.3 8.1 10 % .
7、, . . 6 KS M ISO 17281: 2007 1 2 3 SENB . , . 8.1 . , : . 7.4 , . , , , (5.2 .) . , . 8 8.1 KS M ISO 13586 . , . , . FQ KS M ISO 13586 , 7 KS M ISO 17281: 2007 . , “ (pop-in)” . , 1/2 . F(t) , Fmax Fmax/3 ( 4 ). (curve-fitting) . . nttbttmtF )()()(00= (1) t0, m, b n( ): . n 5 . ( A ) . Fmax/3 Fmax .
8、 t0 . , t0 , )(tF t t0, F 0 . , KS M ISO 13586: 2007 6.1( ) , )(tF ( 4) QF . , “ ”maxF ( 4 ) t tmax )(tF . )(tF ( 5 ) , . F(t) 2/QF QF QF 5 % )(tF . , 2/QF QF QF 5 % )(tF . , F(t) 10 % . F(t) , . 7. . , QF (KS M ISO 13586: 2007 6.1) )(0ttmF = )(05.0/(0ttmF = , 5F )1/(15)05.1/(05.0)05.1/(=nbamF . 5QF
9、F = , tf t5 t0 0.05m/(1.05b)1/(n 1) . 8 KS M ISO 17281: 2007 , F , t 4 QF tf , F , t 5 8.2 8.2.1 9 KS M ISO 17281: 2007 KS M ISO 13586 , GIC . , WQ( 6) , WB . GIC . ( , ) , . ( ) . 8.2.2 . WQ (Ukin) (Uinert) . 8.2.3 . , F , u 6 WQ 8.2.2 , , KS M ISO 13586: 2007 5.4 . 7 a) b) SENB CT . , . / QF ( 8 )
10、 , Wcor / WQ ( 6 ). 10 KS M ISO 17281: 2007 a) SENB b) CT 7 , F , u a b 8 8.2.1 Wcor ( ) Wcor , a/w QF . , WQ . 11 KS M ISO 17281: 2007 KS M ISO 13586: 2007 5.4 , ( QF ) , tf . , . , . , 50 % , . . , . , , KS M ISO 13586 , 0 . . 8.2.3 , Ukin Uinert , WQ,cor (WQ Wcor) GIC WB . ( hw hw ) GIC . KS M IS
11、O 13586: 2007 (6) 9(a) . Ukin Uinert , ( hw) WB 9(b) . WQ Wcor WQ . Wcor ( ) , (8.2.1 ). 9 9.1 KIC 8.1 QF KS M ISO 13586: 2007 6.3 KQ . KQ KIC , KS M ISO 13586: 2007 6.4 . , QF “ ” 8.1 maxF . tf QF t0 tf tQ t0 . 9.2 y y . ty 12 KS M ISO 17281: 2007 tf 20 % . y , . , y . , y . , WBa) WB hw b) WQ,cor (WQ Wcor) hw 9 GIC , y . y . 9.3 GIC . ( ) . 8.1 QF , 9.1 ( ) . (QF ) , WQ ( 6 ). QF , Wcor ( 8 ). hw , WQ,cor (WQ Wcor) 9(b) . GIC . 1 (Ukin Uinert) . , . 2 , 13 KS M ISO 17281: 2007 ( , ) . , GIC KIC . 3