18 1
1. 1 2. 4 3. 11 4. 4.1 17 4.2 22 4.3 26 4.4 29 5. 31 33 34 2
3 1. (Fraxinus lanuginosa) ( 2005) 2 7
4 1.1 (Fraxinus americana) (Acer saccharum) ( ) ( )( ) ( ) (MOR) (U)5% (5%LBS) (SG) (MOE)
5
2. ( ) ( 10~15 40 2.1) ( 37 90 )2.2 1980 (Larix kaempferi) (Fraxinus mandshurica var. japonica) 20 ( 2005) 2.3 2.4 ( 37 90 ) (2.5) (2.6) ( ) 2.1 6
7 2020 4 60 35 25 2 2~3 2.7 20 65( 3068) 12% 2
8
2.1 2.2 9
2.3 2.4 10
2.5 11
2.6 ( ) a. b. 2 c. 20 2 3 d. 2.7 12
3. (ARW) 4.9N140 150 (G) G =Mk1 3 h k1( )0.141 () Sa SaSb SaSb FFT (Ed) Ed (Pa) 4fr 2 l 2 fr (Hz) l (m) (kg/m 3 ) 13
10t JIS-Z-2101 (MOE)(MOR) (U) U 3.1 0.8Pmax x 3 Pl MOE 48I Pl MOR 4 Z P P l I 2 Z 0.8P max 3.1 14
5% (5%LBS) 60 P 05 5%LBS 0. bh P0.05 5(1 ) b, h (CS) CS =PmaxA Pmax A (SS) SS PmaxA Pmax A 15
(Ud)JIS-Z-2101 Ud ( ) U Ud Ud =mr(cos(1180)cos(0180)) 1 () 0 155.8 3.1 16
4. ( ) 4.1 4.2 17
18
4.1 7 ARW 1%SGG5LBS CS 5 (4.3) 4.14.2 ARW 7 0.9~1.7 1.3 2 CV 30% (4.1) SG 0.69~0.78 7 0.73 G 1391~1753MPa 7 1522MPa Ed 13.1~14.8GPa 7 14.1GPa MOE 10.3~12.0GPa 7 11.4GPa SG MOR 107~118MPa 7 113MPa U 20.1~26.4Nm 7 23.3Nm Ud 3 34.2~46.7Nm 3 43.3Nm U 19
Ud ( 1985) 5LBS 20.0~26.1MPa 7 22.4MPa 4 CS 41.0~55.8MPa 7 48.9MPa 4 SS 14.1~17.3MPa 7 15.7MPa SG 5%LBS 2 SG 5%LBS SG 5%LBS MOEMORU 20
21
ARW (mm) 2 1 0 MOE (GPa) Ed (GPa) G (MPa) SG 0.8 0.7 0.6 2000 1500 1000 16 14 12 10 14 12 10 8 4.1 (1) 22
MOR (MPa) 140 120 100 80 CS (MPa) 5%LBS (MPa) Ud (N m) U (Nm) 30 20 10 60 40 20 30 25 20 15 60 50 40 30 SS (MPa) 20 15 10 4.2 (2) 23
4.2 20 3.5 7 4.1 9.9% 2% MOEMOR5%LBSCSSS 12% Wood Handbook (USDA 1994, 4-34) Wood Handbook P = P 12 P 12 P g 12 M M p 12 P M% P12 12% 1 Pg 1 M (%) Mp (%) 2 1 224(%) 24
ARW CV 29.2% SG 0.73 ARW SG (4.5) 1 ( 1979) (4.4) ARW SG U 38%U ARW (r=0.569) U ARW (5) ARW ( 19791985) ARW 1.2~1.4 ARW 2 ARW 2 ARW ARW 25
10 4.3 () 4.4 (20) 26
SG G (MPa) MOR (MPa) MOE (GPa) Ed (GPa) 0.90 0.80 0.70 0.60 2000 1500 1000 20 15 10 5 15 10 5 150 100 50 0 1 2 3 4 5 ARW (mm) SS (MPa) CS (MPa) 5%LBS (MPa) Ud(N m) U (Nm) 60 40 20 0 80 60 40 20 0 40 30 20 10 70 60 50 40 30 20 15 10 0 1 2 3 4 5 ARW (mm) 4.5 ARW 27
4.3 4.7 4.4 GEdMOEMOR5%LBSCS SS 1% SG G 21% Ed MOE MOR 10% MOE U Ud 5%LBS 20%CS 2 SS 10% 3 G5%LBSSS Ed MOE MOEMORCS 5LBS SS 28
G ( ) MOE MOR SG 5%LBS 3 29
SG G (MPa) MOR (MPa) MOE (GPa) Ed (GPa) 0.80 0.75 0.70 0.65 1800 1600 1400 1200 1000 18 16 14 12 10 14 12 10 8 130 120 110 100 90 SS (MPa) CS (MPa) 5%LBS (MPa) Ud(Nm) U (Nm) 40 30 20 10 60 50 40 30 20 25 20 15 60 50 40 18 16 14 12 4.7 30
31 4.4 4.1 SG 4.8 7 ( ) 1 G5LBS SS 1 MOE MOE 14.0GPa 13.1GPa 13.6GPa SG (MOE/SG) MOE ( 18.1GPa) 10%
ARW SG G MOE MOR U 5%LBS CS SS 32
5. (1) SG 5%LBS MOE MOR (2) ARW 2 ARW SG ARW SG (3) ARW ARW (>2 ) U 33
34 (4) GEdMOEMOR5%LBSCSSS MOEMOR5%LBS 3 ( ) (5) (MOE/MOR)
35 3
Forest Products Laboratory(1994)Wood Handbook. USDA Forest Service, Madison, WI, USA. (1986) No.2612-5 (1985) (1986) 53(5)16-20 (1978) 2387-95 (2002) 45(1)14-17 17 (1979) 36(2) 421-450 (1985) 42(3)609-624 (1994) 63133-35 36