3~5
2 ( 1989) 6
( ) 1/3 (1/3h)
1/2 (1/2h) 2/3 (2/3h)
2 ( 1989)
(kgf/cm2)
(MOR) (MOE)
0.6 514 954 118‚110
0.8 686 1‚367 157‚500
0.6 591 1‚085 78‚192
0.8 893 2‚092 172‚565
(2013) 4
700 kg/m3 900 kg/m3 126.8
Mpa 152.9 Mpa 10.7 Gpa 12.3 Gpa
3-5
Ibrahim(1995)
- 15 -