KS M ISO 4651-2008 Cellular rubbers and plastics－Determination of dynamic cushioning performance《泡沫橡胶和塑料 动态弹性的测定》.pdf

1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS M ISO 4651 KS M ISO 4651： 2008 2008 9 12 http:/www.kats.go.krKS M ISO 4651:2008 : ( ) ( ) () () ( ) : (http:/www.standard.go.kr) ： ： 2003 12 31 ： 2008 9 12 2008-0531 ： ： ( 02-509-7301) (http:/www.kats.go.kr). 10 5 , . KS M ISO 4651:2008 Cellular rubbers a

2、nd plastics Determination of dynamic cushioning performance 1988 2 ISO 4651, Cellular rubbers and plastics Determination of dynamic cushioning performance . . . . 1 . . A . . 2 . . ( ) . KS M ISO 291, KS M ISO 845, KS M ISO 1923, KS M ISO 2231, KS M ISO 23529, ISO 3205, Preferred test temperatures 3

3、 . KS M ISO 4651:2008 2 3.1 (static stress) ST (hammer) gn . 3.2 (peak deceleration) a . (SI) m/s2 . 3.3 (displacement curve) ( A ) 3.4 (dynamic stress) . 3.5 (deceleration force) . 3.6 (strain) 3.7 (dynamic compression diagram) ( ) ( / ) . ( ) ( A ). 3.8 (cushioning diagram) Lo ST Lmax a ( A ) 3.9

4、(corrected value of peak deceleration) ac50 mm . 50 mm . 3.10 (equivalent drop height) h (vacuo) KS M ISO 4651:2008 3 m . n22gvh = v ： (m/s) gn ： ( 9.806 65 m/s2) 4 4.1 100 (anvil) . ( 1 2 ). . / . . 5 % . 5 % . 25 mm 1 % . 5 mm . 4.2.1 (transducer) . . . . . . 1 000 Hz . . 95 % . . hgvn2= v ： (m/s)

5、 gn： ( 9.806 65 m/s2) h ： (m) . KS M ISO 4651:2008 4 1 2 3 (displacement potentiometer) 4 5 6 ( ), 950 g 7 (pressure cell), 0 50 kN 8 9 (photographic illumination) 10 11 (AC) 12 (double beam oscilloscope), 0 300 kHz 13 (carrier frequency linear amplifier), 50 kHz 1 7 5 6 4 3 2 8910111 12 13KS M ISO

6、4651:2008 5 2 , (dual trace) ( ) (2 000 kg) 0.1 s 1 s KS M ISO 4651:2008 6 4.2 , , . (piezoelectric) . . ( ) 5 % (response) . 1/2 (half sine) 3 (spire) . ( ) . . . a) 1/2 b) c) 3 KS M ISO 4651:2008 7 4.2.1 . (damping) , . T 1/20 . 1/2 , 1/6 1/10 . (critical) 0.4 0.7 . 5 % 1/2 , 1/3 . , 1/6 . (annula

7、r shear) . . (cathode follower) . 1/2 5 % T 7 . 20T . (charge) 1/2 5 % 1/22T 5 % . 1/50T . 5 % (AC coupling) . 4.2.2 (cathode ray oscilloscopes) . (galvanometer) 0.4 0.7 . 1/2 1/3 . . . . . 2 5 % . . 50 mm 10 25 ms . 25 ms . . 5 5.1 KS M ISO 4651:2008 8 . (1505) mm (1505) mm (505) mm , . . 10 1 2 mm

8、 . KS M ISO 1923 . 20 mm 2 . 5.2 10 1 10 % . 5.3 . . 5.4 10 . 6 72 . KS M ISO 291, KS M ISO 23529 KS M ISO 2231 16 . (232) , (505) % RH . 72 . . 7 7.1 5.1 . KS M ISO 845 . . , . 7.2 7.3 (6015) 3 . . . KS M ISO 4651:2008 9 3 5 . 7.2 250 mm 750 mm 2 . 1 250 mm . 4.1 95 % . . 7.3 5 4 10 20 % . 10 % 2 .

9、 . 8 8.1 (Residual set) . 100oVo LLL Lo ： (mm) LV ： (mm) 8.2 ac . manSocaVVLLa= Lo： (mm) Ls： (50 mm)(mm) Vn ： (m/s) Va ： (m/s) am ： , 9 . a) KS M ISO 4651:2008 10 b) c) d) e) , , f) g) h) KS M ISO 4651:2008 11 A ( ) . A.1 . A.1.1 ST(kPa) a(m/s2) . 7.2 A.2.2 A.2.1 7.1 A.2.5 7.2 A.2.2 A.2.1 7.2 A.2.2

10、A.2.1 A.1.2 (A.1.1 ) , ST Lmax(mm) . A.1 . A.1.3 DYN(kPa) Lmax /Lo . . A.2 A.2.1 ( ) (open cell foam) . . . . (505) mm . KS M ISO 4651:2008 12 10 mm, 25 mm, 50 mm, 75 mm, 100 mm, 125 mm . , , . A.2.2 . . . A.2.3 ST 0.5 kPa 15 kPa . 6 . A.2.4 A.1.2 A.1.3 . A.2.5 . . 4 A.1.1 . A.2.6 40 55 . ISO 3205 .

11、 . A.2.7 (402) (905) % RH . . KS M ISO 4651:2008 13 V1, V2, V3 V4 . (M) ST , amax . A.1 amax (m/s2) ac LmaxLmax(mm) ST(kPa) 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS M ISO 4651:2008 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Cellular rubbers and plastics Determination of dynamic cushioning performance ICS 83.100